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CVE-2021-20255

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device...

5.5 MediumFix available

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.41%Down 0.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.5

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
CVE-2021-20255
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-835, CWE-674
Updated
2026-11-02
CVE List No score

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
CVE-2021-20255
Weakness
CWE-835
Updated
2026-11-02
EUVDEUVD-2021-7693 No score

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
EUVD-2021-7693
Updated
2026-11-03
GitHub AdvisoriesGHSA-v6w7-gq3g-fwvm 5.5

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device...

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
GHSA-v6w7-gq3g-fwvm
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-674, CWE-835
Updated
2026-11-02
OSVALPINE-CVE-2021-20255 5.5

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
ALPINE-CVE-2021-20255
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSVAZL-35149 5.5

CVE-2021-20255 affecting package qemu for versions less than 6.2.0-18

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
AZL-35149
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-05
Show 21 moreShow less
OSVAZL-6829 5.5

CVE-2021-20255 affecting package qemu for versions less than 6.2.0-2

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
AZL-6829
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVBELL-CVE-2021-20255 5.5

CVE-2021-20255 does not affect BellSoft software

Record
BELL-CVE-2021-20255
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 5.5

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
CVE-2021-20255
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2021-20255 5.5

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
DEBIAN-CVE-2021-20255
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2021-20255 5.5

A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

Record
UBUNTU-CVE-2021-20255
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2021:1202-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • CVE-2021-3527: usb: unbounded stack allocation in usbredir (bsc#1186012)
  • CVE-2021-3582: Fix possible mremap overflow in the pvrdma (bsc#1187499)
  • CVE-2021-3592: Fix for slirp: invalid pointer initialization may lead to information disclosure (bootp) (bsc#1187364)
  • CVE-2021-3593: Fix for slirp: invalid pointer initialization may lead to information disclosure (udp6) (bsc#1187365)
  • CVE-2021-3594: Fix for slirp: invalid pointer initialization may lead to information disclosure (udp) (bsc#1187367)
  • CVE-2021-3595: Fixed slirp: invalid pointer initialization may lead to information disclosure (tftp) (bsc#1187366)
  • CVE-2021-3607: Ensure correct input on ring init (bsc#1187539)
  • CVE-2021-3608: Fix the ring init error flow (bsc#1187538)
  • CVE-2021-3611: Fix intel-hda segmentation fault due to stack overflow (bsc#1187529)
  • CVE-2021-3682: usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145)
  • CVE-2020-35503: NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432)
  • CVE-2020-35504,CVE-2020-35505,CVE-2020-35506: NULL pointer dereference in ESP (bsc#1180433 bsc#1180434 bsc#1180435)
  • CVE-2021-20255: eepro100: stack overflow via infinite recursion (bsc#1182651)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

Record
openSUSE-SU-2021:1202-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:2789-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)
Record
openSUSE-SU-2021:2789-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:2858-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)

Non-security issues fixed:

  • Use max host physical address if -cpu max is used (bsc#1188299)
Record
openSUSE-SU-2021:2858-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:3614-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • Fix out-of-bounds write in UAS (USB Attached SCSI) device emulation (bsc#1189702, CVE-2021-3713)
  • Fix heap use-after-free in virtio_net_receive_rcu (bsc#1189938, CVE-2021-3748)
  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)

Non-security issues fixed:

  • Use max host physical address if -cpu max is used (bsc#1188299)
Record
openSUSE-SU-2021:3614-1
Updated
2026-11-02
OSVSUSE-SU-2021:14848-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2021-0089: Fixed Speculative Code Store Bypass (XSA-375) (bsc#1186433).
  • CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654).
  • CVE-2021-28690: Fixed x86 TSX Async Abort protections not restored after S3 (XSA-377) (bsc#1186434).
  • CVE-2021-28692: Fixed inappropriate x86 IOMMU timeout detection / handling (XSA-373) (bsc#1186429).
  • CVE-2021-28697: Fixed grant table v2 status pages may remain accessible after de-allocation (XSA-379) (bsc#1189376).
  • CVE-2021-28698: Fixed long running loops in grant table handling. (XSA-380) (bsc#1189378).
  • CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632).
  • CVE-2021-28703: Fixed grant table v2 status pages may remain accessible after de-allocation (take two) (XSA-387) (bsc#1192555).
  • CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559).
  • CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554).
  • CVE-2021-3527: Fixed unbounded stack allocation in usbredir (bsc#1186013).
  • CVE-2021-3592: Fixed invalid pointer initialization may lead to information disclosure in slirp (bootp) (bsc#1187369).
  • CVE-2021-3594: Fixed invalid pointer initialization may lead to information disclosure in slirp (udp) (bsc#1187378).
  • CVE-2021-3595: Fixed invalid pointer initialization may lead to information disclosure in slirp (tftp) (bsc#1187376).
  • CVE-2021-3682: Fixed free call on invalid pointer in usbredir bufp_alloc (bsc#1189150).
  • CVE-2021-3930: Fixed off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c (bsc#1192526).
Record
SUSE-SU-2021:14848-1
Updated
2026-11-02
OSVSUSE-SU-2021:2789-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)
Record
SUSE-SU-2021:2789-1
Updated
2026-11-02
OSVSUSE-SU-2021:2813-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)
Record
SUSE-SU-2021:2813-1
Updated
2026-11-02
OSVSUSE-SU-2021:2858-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)

Non-security issues fixed:

  • Use max host physical address if -cpu max is used (bsc#1188299)
Record
SUSE-SU-2021:2858-1
Updated
2026-11-02
OSVSUSE-SU-2021:2924-1 No score

Security update for xen

This update for xen fixes the following issues:

Security issues fixed:

  • CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)
  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)
  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)
  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)
  • CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654)
  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).
  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).
  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).
  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).
  • CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).
  • CVE-2021-3592: slirp: invalid pointer initialization may lead to information disclosure (bootp)(bsc#1187369).
  • CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure (udp)(bsc#1187378).
  • CVE-2021-3595: slirp: invalid pointer initialization may lead to information disclosure (tftp)(bsc#1187376).

Other issues fixed:

  • Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)

  • Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)

  • Upstream bug fixes (bsc#1027519)

  • Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).

  • Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).

  • Fixed PVHVM SLES12 SP5 - NMI Watchdog CPU Stuck (bsc#1180846).

  • Core cannot be opened when using xl dump-core of VM with PTF (bsc#1183243)

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:2924-1
Updated
2026-11-02
OSVSUSE-SU-2021:2955-1 No score

Security update for xen

This update for xen fixes the following issues:

Security issues fixed:

  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).

  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).

  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).

  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).

  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)

  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)

  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)

  • CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654)

  • CVE-2021-3592: slirp: invalid pointer initialization may lead to information disclosure (bootp)(bsc#1187369).

  • CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure (udp)(bsc#1187378).

  • CVE-2021-3595: slirp: invalid pointer initialization may lead to information disclosure (tftp)(bsc#1187376).

  • CVE-2021-3308: Fixed IRQ vector leak on x86 (XSA-360)(bsc#1181254).

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:2955-1
Updated
2026-11-02
OSVSUSE-SU-2021:2957-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure (udp)(bsc#1187378).

  • CVE-2021-3595: slirp: invalid pointer initialization may lead to information disclosure (tftp)(bsc#1187376).

  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).

  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).

  • CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654)

  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)

  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)

  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).

  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)

  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).

  • CVE-2021-3592: slirp: invalid pointer initialization may lead to information disclosure (bootp)(bsc#1187369).

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:2957-1
Updated
2026-11-02
OSVSUSE-SU-2021:3322-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632).

  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: Fixed IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).

  • CVE-2021-28697: Fixed grant table v2 status pages that may remain accessible after de-allocation (XSA-379)(bsc#1189376).

  • CVE-2021-28698: Fixed long running loops in grant table handling (XSA-380)(bsc#1189378).

  • CVE-2021-20255: Fixed eepro100 stack overflow via infinite recursion (bsc#1182654).

  • CVE-2021-3592: Fixed invalid pointer initialization may lead to information disclosure (bootp) (bsc#1187369).

  • CVE-2021-3594: Fixed invalid pointer initialization may lead to information disclosure (udp) (bsc#1187378).

  • CVE-2021-3595: Fixed invalid pointer initialization may lead to information disclosure (tftp) (bsc#1187376).

  • CVE-2021-28692: Fixed inappropriate x86 IOMMU timeout detection / handling (XSA-373)(bsc#1186429).

  • CVE-2021-0089: Fixed Speculative Code Store Bypass (XSA-375)(bsc#1186433).

  • CVE-2021-28690: Fixed x86 TSX Async Abort protections not restored after S3 (XSA-377)(bsc#1186434).

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:3322-1
Updated
2026-11-02
OSVSUSE-SU-2021:3575-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)
Record
SUSE-SU-2021:3575-1
Updated
2026-11-02
OSVSUSE-SU-2021:3613-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • Fix heap use-after-free in virtio_net_receive_rcu (bsc#1189938, CVE-2021-3748)
  • Fix out-of-bounds write in UAS (USB Attached SCSI) device emulation (bsc#1189702, CVE-2021-3713)
  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)
Record
SUSE-SU-2021:3613-1
Updated
2026-11-02
OSVSUSE-SU-2021:3614-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • Fix out-of-bounds write in UAS (USB Attached SCSI) device emulation (bsc#1189702, CVE-2021-3713)
  • Fix heap use-after-free in virtio_net_receive_rcu (bsc#1189938, CVE-2021-3748)
  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)

Non-security issues fixed:

  • Use max host physical address if -cpu max is used (bsc#1188299)
Record
SUSE-SU-2021:3614-1
Updated
2026-11-02
OSVSUSE-SU-2021:3635-1 No score

Security update for qemu

This update for qemu fixes the following issues:

Security issues fixed:

  • Fix heap use-after-free in virtio_net_receive_rcu (bsc#1189938, CVE-2021-3748)
  • Fix out-of-bounds write in UAS (USB Attached SCSI) device emulation (bsc#1189702, CVE-2021-3713)
  • usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)
  • NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)
  • NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)
  • eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)
  • usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)
Record
SUSE-SU-2021:3635-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
qemu
Alpine:v3.14
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.15
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.16
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.17
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.18
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.19
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.20
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.21
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.22
 before 6.0.0-r1
6.0.0-r1
qemu
Alpine:v3.23
 before 6.0.0-r1
6.0.0-r1
Show 61 moreShow less
Affected packages
PackageAffectedFixed
qemu
Alpine:v3.24
 before 6.0.0-r1
6.0.0-r1
qemu
Azure Linux:3
 before 6.2.0-18
6.2.0-18
qemu
Azure Linux:2
 before 6.2.0-2
6.2.0-2
qemu
Debian:12
 All versions, plus listed versions
1:10.0.0+ds-11:10.0.0+ds-21:10.0.0+ds-2~bpo12+11:10.0.0+ds-2~bpo12+21:10.0.0~rc0+ds-1
Show 45 moreShow less
1:10.0.0~rc0+ds-21:10.0.0~rc1+ds-11:10.0.0~rc1+ds-21:10.0.0~rc2+ds-11:10.0.0~rc2+ds-21:10.0.0~rc3+ds-11:10.0.0~rc3+ds-21:10.0.2+ds-11:10.0.2+ds-21:10.0.2+ds-2~bpo12+11:10.0.3+ds-11:10.0.3+ds-21:10.0.3+ds-31:10.0.3+ds-41:10.1.0+ds-11:10.1.0+ds-21:10.1.0+ds-31:10.1.0+ds-41:10.1.0+ds-51:10.1.0~rc0+ds-11:10.1.0~rc0+ds-21:10.1.0~rc0+ds-31:10.1.0~rc0+ds-41:10.1.0~rc1+ds-11:10.1.0~rc1+ds-1a1:10.1.0~rc1+ds-1b1:10.1.0~rc1+ds-21:10.1.0~rc1+ds-31:10.1.0~rc2+ds-11:10.1.0~rc3+ds-11:10.1.0~rc3+ds-21:10.1.1+ds-11:10.1.2+ds-11:10.1.2+ds-21:10.1.2+ds-31:10.1.3+ds-11:10.2.0+ds-11:10.2.0+ds-21:10.2.0~rc1+ds-11:10.2.1+ds-11:10.2.2+ds-11:11.0.0+ds-11:11.0.0+ds-21:11.0.0~rc0+ds-11:11.0.0~rc0+ds-2
 None known
qemu
Debian:13
 before 1:8.1.0+ds-1
1:8.1.0+ds-1
qemu
Debian:14
 before 1:8.1.0+ds-1
1:8.1.0+ds-1
qemu
Debian:9
From an advisory covering 7 CVEs
 before 1:2.8+dfsg-6+deb9u14, plus listed versions
1:2.8+dfsg-61:2.8+dfsg-6+deb9u11:2.8+dfsg-6+deb9u101:2.8+dfsg-6+deb9u111:2.8+dfsg-6+deb9u12
Show 9 moreShow less
1:2.8+dfsg-6+deb9u131:2.8+dfsg-6+deb9u21:2.8+dfsg-6+deb9u31:2.8+dfsg-6+deb9u41:2.8+dfsg-6+deb9u51:2.8+dfsg-6+deb9u61:2.8+dfsg-6+deb9u71:2.8+dfsg-6+deb9u81:2.8+dfsg-6+deb9u9
1:2.8+dfsg-6+deb9u14
xen
SUSE:Linux Enterprise Server 11 SP4-LTSS
From an advisory covering 17 CVEs
 before 4.4.4_50-61.67.1
4.4.4_50-61.67.1
qemu
SUSE:Linux Enterprise Module for Basesystem 15 SP2
From an advisory covering 7 CVEs
 before 4.2.1-11.28.1
4.2.1-11.28.1
qemu
SUSE:Linux Enterprise Module for Server Applications 15 SP2
From an advisory covering 7 CVEs
 before 4.2.1-11.28.1
4.2.1-11.28.1
qemu
SUSE:Linux Enterprise Micro 5.0
From an advisory covering 7 CVEs
 before 4.2.1-11.28.1
4.2.1-11.28.1
qemu
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 7 CVEs
 before 3.1.1.1-57.2
3.1.1.1-57.2
qemu
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 7 CVEs
 before 3.1.1.1-57.2
3.1.1.1-57.2
qemu
SUSE:Linux Enterprise Module for Basesystem 15 SP3
From an advisory covering 7 CVEs
 before 5.2.0-103.2
5.2.0-103.2
qemu
SUSE:Linux Enterprise Module for Server Applications 15 SP3
From an advisory covering 7 CVEs
 before 5.2.0-103.2
5.2.0-103.2
xen
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 15 CVEs
 before 4.12.4_12-3.49.1
4.12.4_12-3.49.1
xen
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 15 CVEs
 before 4.12.4_12-3.49.1
4.12.4_12-3.49.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 15 CVEs
 before 4.12.4_12-3.49.1
4.12.4_12-3.49.1
xen
SUSE:OpenStack Cloud 9
From an advisory covering 14 CVEs
 before 4.11.4_20-2.60.1
4.11.4_20-2.60.1
xen
SUSE:OpenStack Cloud Crowbar 9
From an advisory covering 14 CVEs
 before 4.11.4_20-2.60.1
4.11.4_20-2.60.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
From an advisory covering 14 CVEs
 before 4.11.4_20-2.60.1
4.11.4_20-2.60.1
xen
SUSE:Linux Enterprise Server 12 SP4-LTSS
From an advisory covering 14 CVEs
 before 4.11.4_20-2.60.1
4.11.4_20-2.60.1
xen
SUSE:HPE Helion OpenStack 8
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:OpenStack Cloud 8
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:OpenStack Cloud Crowbar 8
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP3
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:Linux Enterprise Server 12 SP3-LTSS
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:Linux Enterprise Server 12 SP3-BCL
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:Linux Enterprise Server 12 SP2-BCL
From an advisory covering 13 CVEs
 before 4.7.6_16-43.79.5
4.7.6_16-43.79.5
qemu
SUSE:Linux Enterprise Server 12 SP2-BCL
From an advisory covering 7 CVEs
 before 2.6.2-41.73.1
2.6.2-41.73.1
qemu
SUSE:Linux Enterprise High Performance Computing 15-ESPOS
From an advisory covering 9 CVEs
 before 2.11.2-70.59.1
2.11.2-70.59.1
qemu
SUSE:Linux Enterprise High Performance Computing 15-LTSS
From an advisory covering 9 CVEs
 before 2.11.2-70.59.1
2.11.2-70.59.1
qemu
SUSE:Linux Enterprise Server 15-LTSS
From an advisory covering 9 CVEs
 before 2.11.2-70.59.1
2.11.2-70.59.1
qemu
SUSE:Linux Enterprise Server for SAP Applications 15
From an advisory covering 9 CVEs
 before 2.11.2-70.59.1
2.11.2-70.59.1
qemu
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS
From an advisory covering 9 CVEs
 before 3.1.1.1-80.40.1
3.1.1.1-80.40.1
qemu
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS
From an advisory covering 9 CVEs
 before 3.1.1.1-80.40.1
3.1.1.1-80.40.1
qemu
SUSE:Linux Enterprise Server 15 SP1-BCL
From an advisory covering 9 CVEs
 before 3.1.1.1-80.40.1
3.1.1.1-80.40.1
qemu
SUSE:Linux Enterprise Server 15 SP1-LTSS
From an advisory covering 9 CVEs
 before 3.1.1.1-80.40.1
3.1.1.1-80.40.1
qemu
SUSE:Linux Enterprise Server for SAP Applications 15 SP1
From an advisory covering 9 CVEs
 before 3.1.1.1-80.40.1
3.1.1.1-80.40.1
qemu
SUSE:Enterprise Storage 6
From an advisory covering 9 CVEs
 before 3.1.1.1-80.40.1
3.1.1.1-80.40.1
qemu
SUSE:OpenStack Cloud 9
From an advisory covering 9 CVEs
 before 2.11.2-5.40.2
2.11.2-5.40.2
qemu
SUSE:OpenStack Cloud Crowbar 9
From an advisory covering 9 CVEs
 before 2.11.2-5.40.2
2.11.2-5.40.2
qemu
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
From an advisory covering 9 CVEs
 before 2.11.2-5.40.2
2.11.2-5.40.2
qemu
SUSE:Linux Enterprise Server 12 SP4-LTSS
From an advisory covering 9 CVEs
 before 2.11.2-5.40.2
2.11.2-5.40.2
qemu
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1.5.0+dfsg-3ubuntu51.5.0+dfsg-3ubuntu61.6.0+dfsg-2ubuntu11.6.0+dfsg-2ubuntu21.6.0+dfsg-2ubuntu3
Show 45 moreShow less
1.6.0+dfsg-2ubuntu41.7.0+dfsg-2ubuntu11.7.0+dfsg-2ubuntu21.7.0+dfsg-2ubuntu31.7.0+dfsg-2ubuntu41.7.0+dfsg-2ubuntu51.7.0+dfsg-2ubuntu71.7.0+dfsg-2ubuntu81.7.0+dfsg-2ubuntu91.7.0+dfsg-3ubuntu1~ppa11.7.0+dfsg-3ubuntu11.7.0+dfsg-3ubuntu21.7.0+dfsg-3ubuntu31.7.0+dfsg-3ubuntu41.7.0+dfsg-3ubuntu51.7.0+dfsg-3ubuntu61.7.0+dfsg-3ubuntu72.0.0~rc1+dfsg-0ubuntu12.0.0~rc1+dfsg-0ubuntu22.0.0~rc1+dfsg-0ubuntu32.0.0~rc1+dfsg-0ubuntu3.12.0.0+dfsg-2ubuntu12.0.0+dfsg-2ubuntu1.12.0.0+dfsg-2ubuntu1.22.0.0+dfsg-2ubuntu1.32.0.0+dfsg-2ubuntu1.52.0.0+dfsg-2ubuntu1.62.0.0+dfsg-2ubuntu1.72.0.0+dfsg-2ubuntu1.82.0.0+dfsg-2ubuntu1.92.0.0+dfsg-2ubuntu1.102.0.0+dfsg-2ubuntu1.112.0.0+dfsg-2ubuntu1.132.0.0+dfsg-2ubuntu1.142.0.0+dfsg-2ubuntu1.152.0.0+dfsg-2ubuntu1.162.0.0+dfsg-2ubuntu1.172.0.0+dfsg-2ubuntu1.182.0.0+dfsg-2ubuntu1.192.0.0+dfsg-2ubuntu1.202.0.0+dfsg-2ubuntu1.212.0.0+dfsg-2ubuntu1.222.0.0+dfsg-2ubuntu1.242.0.0+dfsg-2ubuntu1.252.0.0+dfsg-2ubuntu1.26
 None known
qemu
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1:2.3+dfsg-5ubuntu91:2.3+dfsg-5ubuntu101:2.4+dfsg-4ubuntu11:2.4+dfsg-4ubuntu21:2.4+dfsg-4ubuntu3
Show 45 moreShow less
1:2.4+dfsg-5ubuntu31:2.5+dfsg-1ubuntu21:2.5+dfsg-1ubuntu31:2.5+dfsg-1ubuntu41:2.5+dfsg-1ubuntu51:2.5+dfsg-5ubuntu11:2.5+dfsg-5ubuntu21:2.5+dfsg-5ubuntu41:2.5+dfsg-5ubuntu61:2.5+dfsg-5ubuntu71:2.5+dfsg-5ubuntu101:2.5+dfsg-5ubuntu10.11:2.5+dfsg-5ubuntu10.21:2.5+dfsg-5ubuntu10.31:2.5+dfsg-5ubuntu10.41:2.5+dfsg-5ubuntu10.51:2.5+dfsg-5ubuntu10.61:2.5+dfsg-5ubuntu10.71:2.5+dfsg-5ubuntu10.81:2.5+dfsg-5ubuntu10.91:2.5+dfsg-5ubuntu10.101:2.5+dfsg-5ubuntu10.111:2.5+dfsg-5ubuntu10.131:2.5+dfsg-5ubuntu10.141:2.5+dfsg-5ubuntu10.151:2.5+dfsg-5ubuntu10.161:2.5+dfsg-5ubuntu10.201:2.5+dfsg-5ubuntu10.211:2.5+dfsg-5ubuntu10.221:2.5+dfsg-5ubuntu10.241:2.5+dfsg-5ubuntu10.251:2.5+dfsg-5ubuntu10.261:2.5+dfsg-5ubuntu10.281:2.5+dfsg-5ubuntu10.291:2.5+dfsg-5ubuntu10.301:2.5+dfsg-5ubuntu10.311:2.5+dfsg-5ubuntu10.321:2.5+dfsg-5ubuntu10.331:2.5+dfsg-5ubuntu10.341:2.5+dfsg-5ubuntu10.351:2.5+dfsg-5ubuntu10.361:2.5+dfsg-5ubuntu10.371:2.5+dfsg-5ubuntu10.381:2.5+dfsg-5ubuntu10.391:2.5+dfsg-5ubuntu10.40
 None known
qemu
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
1:2.10+dfsg-0ubuntu31:2.10+dfsg-0ubuntu41:2.10+dfsg-0ubuntu51:2.11+dfsg-1ubuntu11:2.11+dfsg-1ubuntu2
Show 45 moreShow less
1:2.11+dfsg-1ubuntu41:2.11+dfsg-1ubuntu51:2.11+dfsg-1ubuntu61:2.11+dfsg-1ubuntu71:2.11+dfsg-1ubuntu7.11:2.11+dfsg-1ubuntu7.21:2.11+dfsg-1ubuntu7.31:2.11+dfsg-1ubuntu7.41:2.11+dfsg-1ubuntu7.51:2.11+dfsg-1ubuntu7.61:2.11+dfsg-1ubuntu7.71:2.11+dfsg-1ubuntu7.81:2.11+dfsg-1ubuntu7.91:2.11+dfsg-1ubuntu7.101:2.11+dfsg-1ubuntu7.121:2.11+dfsg-1ubuntu7.131:2.11+dfsg-1ubuntu7.141:2.11+dfsg-1ubuntu7.151:2.11+dfsg-1ubuntu7.171:2.11+dfsg-1ubuntu7.181:2.11+dfsg-1ubuntu7.191:2.11+dfsg-1ubuntu7.201:2.11+dfsg-1ubuntu7.211:2.11+dfsg-1ubuntu7.221:2.11+dfsg-1ubuntu7.231:2.11+dfsg-1ubuntu7.251:2.11+dfsg-1ubuntu7.261:2.11+dfsg-1ubuntu7.271:2.11+dfsg-1ubuntu7.281:2.11+dfsg-1ubuntu7.291:2.11+dfsg-1ubuntu7.311:2.11+dfsg-1ubuntu7.321:2.11+dfsg-1ubuntu7.331:2.11+dfsg-1ubuntu7.341:2.11+dfsg-1ubuntu7.351:2.11+dfsg-1ubuntu7.361:2.11+dfsg-1ubuntu7.371:2.11+dfsg-1ubuntu7.381:2.11+dfsg-1ubuntu7.391:2.11+dfsg-1ubuntu7.401:2.11+dfsg-1ubuntu7.411:2.11+dfsg-1ubuntu7.421:2.11+dfsg-1ubuntu7.42+esm11:2.11+dfsg-1ubuntu7.42+esm21:2.11+dfsg-1ubuntu7.42+esm5
 None known
qemu
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
1:4.0+dfsg-0ubuntu91:4.0+dfsg-0ubuntu101:4.2-1ubuntu11:4.2-1ubuntu21:4.2-3ubuntu1
Show 35 moreShow less
1:4.2-3ubuntu21:4.2-3ubuntu31:4.2-3ubuntu41:4.2-3ubuntu51:4.2-3ubuntu61:4.2-3ubuntu6.11:4.2-3ubuntu6.21:4.2-3ubuntu6.31:4.2-3ubuntu6.41:4.2-3ubuntu6.51:4.2-3ubuntu6.61:4.2-3ubuntu6.71:4.2-3ubuntu6.81:4.2-3ubuntu6.91:4.2-3ubuntu6.101:4.2-3ubuntu6.111:4.2-3ubuntu6.121:4.2-3ubuntu6.141:4.2-3ubuntu6.151:4.2-3ubuntu6.161:4.2-3ubuntu6.171:4.2-3ubuntu6.181:4.2-3ubuntu6.191:4.2-3ubuntu6.211:4.2-3ubuntu6.231:4.2-3ubuntu6.241:4.2-3ubuntu6.251:4.2-3ubuntu6.261:4.2-3ubuntu6.271:4.2-3ubuntu6.281:4.2-3ubuntu6.291:4.2-3ubuntu6.301:4.2-3ubuntu6.30+esm11:4.2-3ubuntu6.30+esm21:4.2-3ubuntu6.30+esm3
 None known
qemu
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:6.0+dfsg-2expubuntu11:6.0+dfsg-2expubuntu21:6.0+dfsg-2expubuntu41:6.2+dfsg-2ubuntu51:6.2+dfsg-2ubuntu6
Show 30 moreShow less
1:6.2+dfsg-2ubuntu6.11:6.2+dfsg-2ubuntu6.21:6.2+dfsg-2ubuntu6.31:6.2+dfsg-2ubuntu6.41:6.2+dfsg-2ubuntu6.51:6.2+dfsg-2ubuntu6.61:6.2+dfsg-2ubuntu6.71:6.2+dfsg-2ubuntu6.81:6.2+dfsg-2ubuntu6.91:6.2+dfsg-2ubuntu6.101:6.2+dfsg-2ubuntu6.111:6.2+dfsg-2ubuntu6.121:6.2+dfsg-2ubuntu6.131:6.2+dfsg-2ubuntu6.141:6.2+dfsg-2ubuntu6.151:6.2+dfsg-2ubuntu6.161:6.2+dfsg-2ubuntu6.171:6.2+dfsg-2ubuntu6.181:6.2+dfsg-2ubuntu6.191:6.2+dfsg-2ubuntu6.211:6.2+dfsg-2ubuntu6.221:6.2+dfsg-2ubuntu6.231:6.2+dfsg-2ubuntu6.241:6.2+dfsg-2ubuntu6.251:6.2+dfsg-2ubuntu6.261:6.2+dfsg-2ubuntu6.271:6.2+dfsg-2ubuntu6.281:6.2+dfsg-2ubuntu6.291:6.2+dfsg-2ubuntu6.301:6.2+dfsg-2ubuntu6.31
 None known
qemu
Ubuntu:24.04:LTS
 All versions, plus listed versions
1:8.0.4+dfsg-1ubuntu31:8.0.4+dfsg-1ubuntu41:8.0.4+dfsg-1ubuntu51:8.1.3+ds-1ubuntu21:8.2.1+ds-1ubuntu1
Show 19 moreShow less
1:8.2.1+ds-1ubuntu81:8.2.1+ds-1ubuntu91:8.2.2+ds-0ubuntu11:8.2.2+ds-0ubuntu1.21:8.2.2+ds-0ubuntu1.41:8.2.2+ds-0ubuntu1.51:8.2.2+ds-0ubuntu1.61:8.2.2+ds-0ubuntu1.71:8.2.2+ds-0ubuntu1.81:8.2.2+ds-0ubuntu1.91:8.2.2+ds-0ubuntu1.101:8.2.2+ds-0ubuntu1.111:8.2.2+ds-0ubuntu1.121:8.2.2+ds-0ubuntu1.131:8.2.2+ds-0ubuntu1.141:8.2.2+ds-0ubuntu1.151:8.2.2+ds-0ubuntu1.161:8.2.2+ds-0ubuntu1.171:8.2.2+ds-0ubuntu1.18
 None known
qemu
Ubuntu:25.10
 All versions, plus listed versions
1:9.2.1+ds-1ubuntu51:10.0.2+ds-1ubuntu11:10.0.2+ds-1ubuntu21:10.1.0+ds-1ubuntu11:10.1.0+ds-5ubuntu1
Show 7 moreShow less
1:10.1.0+ds-5ubuntu21:10.1.0+ds-5ubuntu2.11:10.1.0+ds-5ubuntu2.21:10.1.0+ds-5ubuntu2.41:10.1.0+ds-5ubuntu2.51:10.1.0+ds-5ubuntu2.61:10.1.0+ds-5ubuntu2.7
 None known
qemu
Ubuntu:26.10
 All versions, plus listed versions
1:10.2.1+ds-1ubuntu31:10.2.1+ds-1ubuntu61:11.0.3+ds-2ubuntu11:11.0.3+ds-2ubuntu2
 None known
qemu-hwe
Ubuntu:26.10
 All versions, plus listed versions
1:10.2.1+ds-1ubuntu41:10.2.1+ds-1ubuntu71:10.2.1+ds-1ubuntu81:11.0.3+ds-2ubuntu21:11.0.3+ds-2ubuntu4
 None known
qemu
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:10.1.0+ds-5ubuntu21:10.1.0+ds-5ubuntu31:10.1.0+ds-5ubuntu41:10.1.0+ds-5ubuntu51:10.2.1+ds-1ubuntu1
Show 5 moreShow less
1:10.2.1+ds-1ubuntu21:10.2.1+ds-1ubuntu31:10.2.1+ds-1ubuntu3.11:10.2.1+ds-1ubuntu3.21:10.2.1+ds-1ubuntu3.3
 None known
qemu-hwe
Ubuntu:26.04:LTS
 All versions, plus listed versions
1:10.2.1+ds-1ubuntu21:10.2.1+ds-1ubuntu41:10.2.1+ds-1ubuntu4.21:10.2.1+ds-1ubuntu4.31:10.2.1+ds-1ubuntu4.4
 None known
qemu
openSUSE:Leap 15.2
From an advisory covering 15 CVEs
 before 4.2.1-lp152.9.20.1
4.2.1-lp152.9.20.1
qemu-linux-user
openSUSE:Leap 15.2
From an advisory covering 15 CVEs
 before 4.2.1-lp152.9.20.1
4.2.1-lp152.9.20.1
qemu-testsuite
openSUSE:Leap 15.2
From an advisory covering 15 CVEs
 before 4.2.1-lp152.9.20.1
4.2.1-lp152.9.20.1
qemu
openSUSE:Leap 15.3
From an advisory covering 7 CVEs
 before 4.2.1-11.28.1
4.2.1-11.28.1
qemu
openSUSE:Leap 15.3
From an advisory covering 7 CVEs
 before 5.2.0-103.2
5.2.0-103.2
qemu
openSUSE:Leap 15.3
From an advisory covering 9 CVEs
 before 3.1.1.1-80.40.1
3.1.1.1-80.40.1

History

History
RecordedChangedSources
affected
factsOSV
affected, aliases, referencesOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-20255 is a medium vulnerability (CVSS 5.5) in Qemu, published March 9, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. Fixed in qemu 6.0.0-r1.

References

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Left out here: 196 versions. The JSON record has them.

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