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CVE-2026-66021

qemu security update

8.8 HighFix available

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

CVE-2026-16457 is a security vulnerability in QEMU. The specific details of this vulnerability have not been fully disclosed. This vulnerability may affect the normal operation of the QEMU virtualization platform and poses potential security risks.(CVE-2026-16457)

An unknown vulnerability exists in QEMU, details are not yet disclosed.(CVE-2026-50626)

QEMU (Quick Emulator) is an open-source machine emulator and virtualizer widely used to run operating systems for different architectures. CVE-2026-66021 is a security vulnerability affecting QEMU, with specific details not yet fully disclosed.(CVE-2026-66021)

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
High
Integrity
High
Availability
High

What each source reports

OSV Score usedOESA-2026-3696 8.8

qemu security update

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

CVE-2026-16457 is a security vulnerability in QEMU. The specific details of this vulnerability have not been fully disclosed. This vulnerability may affect the normal operation of the QEMU virtualization platform and poses potential security risks.(CVE-2026-16457)

An unknown vulnerability exists in QEMU, details are not yet disclosed.(CVE-2026-50626)

QEMU (Quick Emulator) is an open-source machine emulator and virtualizer widely used to run operating systems for different architectures. CVE-2026-66021 is a security vulnerability affecting QEMU, with specific details not yet fully disclosed.(CVE-2026-66021)

Record
OESA-2026-3696
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSV Score usedOESA-2026-3697 8.8

qemu security update

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

CVE-2026-16457 is a security vulnerability in QEMU. The specific details of this vulnerability have not been fully disclosed. This vulnerability may affect the normal operation of the QEMU virtualization platform and poses potential security risks.(CVE-2026-16457)

An unknown vulnerability exists in QEMU, details are not yet disclosed.(CVE-2026-50626)

QEMU (Quick Emulator) is an open-source machine emulator and virtualizer widely used to run operating systems for different architectures. CVE-2026-66021 is a security vulnerability affecting QEMU, with specific details not yet fully disclosed.(CVE-2026-66021)

Record
OESA-2026-3697
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSV Score usedOESA-2026-3698 8.8

qemu security update

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

CVE-2026-16457 is a security vulnerability in QEMU. The specific details of this vulnerability have not been fully disclosed. This vulnerability may affect the normal operation of the QEMU virtualization platform and poses potential security risks.(CVE-2026-16457)

An unknown vulnerability exists in QEMU, details are not yet disclosed.(CVE-2026-50626)

QEMU (Quick Emulator) is an open-source machine emulator and virtualizer widely used to run operating systems for different architectures. CVE-2026-66021 is a security vulnerability affecting QEMU, with specific details not yet fully disclosed.(CVE-2026-66021)

Record
OESA-2026-3698
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSV Score usedOESA-2026-3845 8.8

qemu security update

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

An unknown vulnerability exists in QEMU, with no detailed description available at this time.(CVE-2026-15264)

CVE-2026-16457 is a security vulnerability in QEMU. The specific details of this vulnerability have not been fully disclosed. This vulnerability may affect the normal operation of the QEMU virtualization platform and poses potential security risks.(CVE-2026-16457)

CVE-2026-18054 is a vulnerability in QEMU, details are not yet disclosed.(CVE-2026-18054)

This update to qemu-10.2.4-2.mga10 fixes 14 CVEs from 10.2.3 and 2 from 10.2.4(CVE-2026-3890)

This update to qemu-10.2.4-2.mga10 fixes 14 CVEs from 10.2.3 and 2 from 10.2.4. This vulnerability (CVE-2026-48004) is one of them.(CVE-2026-48004)

QEMU's virtio-rng frontend does not cancel or detach an RngRequest that is still pending on the rng-random backend before releasing the VirtIORNG object in virtio_rng_device_unrealize(). When a virtio-rng device is hot-plugged (device_del) and there are still entropy requests pending, the delayed backend completion calls the chr_read callback on the released object, causing the host heap to be use-after-free. An attacker able to trigger hot-plugging of the device could exploit this memory security flaw to compromise the QEMU process, causing a denial of service or potential code execution on the host.(CVE-2026-50624)

An unknown vulnerability exists in QEMU, details are not yet disclosed.(CVE-2026-50626)

No detailed vulnerability information available.(CVE-2026-61402)

An unspecified vulnerability exists in QEMU, with no detailed information available at this time.(CVE-2026-61476)

CVE-2026-63109 is a vulnerability in QEMU. Details of this vulnerability have not been publicly disclosed yet.(CVE-2026-63109)

No detailed description available.(CVE-2026-63110)

An unknown vulnerability exists in QEMU, the details of which have not yet been disclosed. Attackers may exploit this vulnerability to cause unknown impacts.(CVE-2026-63320)

An unknown vulnerability exists in QEMU, the details of which have not yet been disclosed. Attackers may exploit this vulnerability to cause unknown impacts.(CVE-2026-63321)

When QEMU's uefi-vars-x64 virtual device processes the VarCheckPolicy REGISTER command, the uefi_vars_mm_check_policy_register() function directly reads pe->size without first verifying whether the request length contains the complete variable_policy_entry header. The guest can send a REGISTER request with a length of exactly sizeof(mm_check_policy) (excluding variable_policy_entry), causing the func pointer to cross the end of the allocated MM communication buffer, causing the host heap buffer to read out of bounds (heap-buffer-overflow). An attacker could exploit this memory security flaw to compromise the QEMU process, causing a denial of service or potential code execution on the host.(CVE-2026-63322)

An undisclosed vulnerability exists in QEMU, the details of which are not yet publicly available.(CVE-2026-63323)

An unknown type vulnerability exists in QEMU (Quick Emulator). The specific details have not been disclosed yet.(CVE-2026-65928)

CVE-2026-65929 is a security vulnerability affecting QEMU, with no detailed technical information disclosed yet.(CVE-2026-65929)

QEMU (Quick Emulator) is an open-source machine emulator and virtualizer widely used to run operating systems for different architectures. CVE-2026-66021 is a security vulnerability affecting QEMU, with specific details not yet fully disclosed.(CVE-2026-66021)

An unspecified vulnerability exists in QEMU, the details of which have not been disclosed.(CVE-2026-66022)

QEMU's VNC extended clipboard handler, after decompressing a client-controlled clipboard payload, compares the declared text size to the entire decompression buffer size, but then copies tsize bytes from buf + 4. The correct boundary is the remaining data…

Record
OESA-2026-3845
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-66021 No score

OOB access in virtio-gpu blob resource creation

Record
UBUNTU-CVE-2026-66021
Updated
2026-11-02

Affected packages

Affected packages
PackageAffectedFixed
qemu
Alpaquita:23
 7.1.0-r4 up to 9.0.4-r3
9.0.4-r3
qemu
Alpaquita:25
 10.0.0-r1 up to 10.0.13-r0
10.0.13-r0
qemu
Alpaquita:stream
 8.0.2-r0 up to 11.1.1-r0
11.1.1-r0
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 1:10.0.13+ds-0+deb13u1, plus listed versions
1:10.0.10+ds-0+deb13u11:10.0.11+ds-0+deb13u11:10.0.2+ds-21:10.0.2+ds-2+deb13u11:10.0.2+ds-2+deb13u1~bpo12+1
Show 9 moreShow less
1:10.0.3+ds-0+deb13u11:10.0.3+ds-11:10.0.3+ds-21:10.0.3+ds-31:10.0.3+ds-41:10.0.6+ds-0+deb13u11:10.0.6+ds-0+deb13u21:10.0.7+ds-0+deb13u11:10.0.8+ds-0+deb13u1
1:10.0.13+ds-0+deb13u1
qemu
Debian:14
 before 1:11.1.0+ds-1, plus listed versions
1:10.0.2+ds-21:10.0.3+ds-11:10.0.3+ds-21:10.0.3+ds-31:10.0.3+ds-4
Show 45 moreShow less
1:10.1.0+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-21:11.0.0~rc1+ds-11:11.0.0~rc1+ds-21:11.0.0~rc1+ds-31:11.0.0~rc2+ds-11:11.0.0~rc2+ds-21:11.0.0~rc3+ds-11:11.0.1+ds-11:11.0.2+ds-11:11.0.2+ds-21:11.0.2+ds-2~bpo13+11:11.0.3+ds-11:11.0.3+ds-21:11.1.0~rc0+ds-11:11.1.0~rc0+ds-2
1:11.1.0+ds-1
qemu
openEuler:22.03-LTS-SP4
From an advisory covering 3 CVEs
 before 6.2.0-118.oe2203sp4
6.2.0-118.oe2203sp4
qemu
openEuler:24.03-LTS-SP1
From an advisory covering 3 CVEs
 before 8.2.0-60.oe2403sp1
8.2.0-60.oe2403sp1
qemu
openEuler:24.03-LTS-SP3
From an advisory covering 3 CVEs
 before 8.2.0-89.oe2403sp3
8.2.0-89.oe2403sp3
qemu
openEuler:24.03-LTS-SP4
From an advisory covering 20 CVEs
 before 8.2.0-86.oe2403sp4
8.2.0-86.oe2403sp4
Show 10 moreShow less
Affected packages
PackageAffectedFixed
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: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

History

History
RecordedChangedSources
affected, facts
first indexedOSV

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In short

CVE-2026-66021 is a high vulnerability (CVSS 8.8) in qemu, published August 14, 2026. No source lists public exploit code. Fixed in qemu 9.0.4-r3.

References

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Left out here: 192 versions and the rest of 1 source description. The JSON record has them.

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