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CVE-2026-62425

buffer overruns in libfsimage iso9660 handling

5.5 MediumFix available

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them:

  • The directory loop itself assumes a good record length. This is CVE-2026-42494.

  • The calculation of the System Use area may underflow. This is CVE-2026-42495.

  • The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423.

  • The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424.

  • The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.20%Unchanged since Jul 29, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.5

buffer overruns in libfsimage iso9660 handling

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them:

  • The directory loop itself assumes a good record length. This is CVE-2026-42494.

  • The calculation of the System Use area may underflow. This is CVE-2026-42495.

  • The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423.

  • The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424.

  • The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.

Record
CVE-2026-62425
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-20
Updated
2026-11-02
EUVDEUVD-2026-49776 5.5

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them:

  • The directory loop itself assumes a good record length. This is CVE-2026-42494.

  • The calculation of the System Use area may underflow. This is CVE-2026-42495.

  • The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423.

  • The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424.

  • The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.

Record
EUVD-2026-49776
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-r2qc-jvxx-r42q 5.5

[This CNA information record relates to multiple CVEs; the text explains which aspects...

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them:

  • The directory loop itself assumes a good record length. This is CVE-2026-42494.

  • The calculation of the System Use area may underflow. This is CVE-2026-42495.

  • The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423.

  • The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424.

  • The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.

Record
GHSA-r2qc-jvxx-r42q
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-20
Updated
2026-11-02
NVD 5.5

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them:

  • The directory loop itself assumes a good record length. This is CVE-2026-42494.

  • The calculation of the System Use area may underflow. This is CVE-2026-42495.

  • The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423.

  • The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424.

  • The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.

Record
CVE-2026-62425
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-20
Updated
2026-11-02
OSVALPINE-CVE-2026-62425 5.5

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]

The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them:

  • The directory loop itself assumes a good record length. This is CVE-2026-42494.

  • The calculation of the System Use area may underflow. This is CVE-2026-42495.

  • The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423.

  • The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424.

  • The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.

Record
ALPINE-CVE-2026-62425
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2026-62425 5.5

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them: * The directory loop itself assumes a good record length. This is CVE-2026-42494. * The calculation of the System Use area may underflow. This is CVE-2026-42495. * The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423. * The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424. * The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.

Record
DEBIAN-CVE-2026-62425
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVUBUNTU-CVE-2026-62425 5.5

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver derives several lengths directly from attacker-controlled on-disk fields without validating them: * The directory loop itself assumes a good record length. This is CVE-2026-42494. * The calculation of the System Use area may underflow. This is CVE-2026-42495. * The Rock Ridge extension loop assumes a good (inner) record length. This is CVE-2026-62423. * The Rock Ridge NM record processing assumes a good entry length. This is CVE-2026-62424. * The Rock Ridge CE record processing assumes a good size and offset. This is CVE-2026-62425.

Record
UBUNTU-CVE-2026-62425
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVSUSE-SU-2026:3409-1 No score

Security update for xen

This update for xen fixes the following issues

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • pygrub is only supported in de-privileged mode (XSA-508) (bsc#1271947).
Record
SUSE-SU-2026:3409-1
Updated
2026-11-02
OSVSUSE-SU-2026:3423-1 No score

Security update for xen

This update for xen fixes the following issues

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • pygrub is only supported in de-privileged mode (XSA-508) (bsc#1271947).
Record
SUSE-SU-2026:3423-1
Updated
2026-11-02
OSVSUSE-SU-2026:3451-1 No score

Security update for xen

This update for xen fixes the following issues

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • pygrub is only supported in de-privileged mode (XSA-508) (bsc#1271947).
Record
SUSE-SU-2026:3451-1
Updated
2026-11-02
OSVSUSE-SU-2026:3462-1 No score

Security update for xen

This update for xen fixes the following issues

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • pygrub is only supported in de-privileged mode (XSA-508) (bsc#1271947).
Record
SUSE-SU-2026:3462-1
Updated
2026-11-02
OSVSUSE-SU-2026:4090-1 No score

Security update for xen

This update for xen fixes the following issues:

Update to version 4.20.3 (jsc#PED-8907).

Security issues fixed:

  • CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
  • CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in libfsimage iso9660 handling (bsc#1271530).
  • CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
  • CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
  • CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
  • CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
  • CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
  • CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
  • CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
  • CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
  • CVE-2026-62437: x86: DMs may cause mem leak by IRQ binding (bsc#1276838).
  • CVE-2026-79602: x86: improper handling of HVM emulation return codes (bsc#1276839).
  • CVE-2026-79603: unconditionally do TLB flushing ahead of page scrubbing (bsc#1276841).
  • pygrub is only supported in de-privileged mode (bsc#1271947).

Non security issue fixed:

  • Xen: Missing upstream bug fixes (bsc#1027519).
Record
SUSE-SU-2026:4090-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.21
 before 4.19.6-r0
4.19.6-r0
xen
Alpine:v3.22
 before 4.20.4-r0
4.20.4-r0
xen
Alpine:v3.23
 before 4.20.4-r0
4.20.4-r0
xen
Alpine:v3.24
 before 4.21.2-r0
4.21.2-r0
xen
Debian:12
 before 4.17.7-0+deb12u1, plus listed versions
4.17.1+2-gb773c48e36-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1~deb12u14.17.2-1
Show 9 moreShow less
4.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.14.17.3+10-g091466ba55-1.1~exp14.17.3+10-g091466ba55-1.1~exp24.17.3+10-g091466ba55-1~deb12u14.17.3+36-g54dacb5c02-14.17.5+23-ga4e5191dc0-14.17.5+23-ga4e5191dc0-1+deb12u14.17.5+72-g01140da4e8-1
4.17.7-0+deb12u1
xen
Debian:13
 before 4.20.3+127-gc42374a105-0+deb13u1, plus listed versions
4.20.0+68-g35cb38b222-14.20.2+37-g61ff35323e-0+deb13u14.20.2+37-g61ff35323e-14.20.2+7-g1badcf5035-0+deb13u14.20.2+7-g1badcf5035-14.20.2+7-g1badcf5035-2
4.20.3+127-gc42374a105-0+deb13u1
xen
Debian:14
 before 4.20.3+127-gc42374a105-1, plus listed versions
4.20.0+68-g35cb38b222-14.20.2+37-g61ff35323e-14.20.2+7-g1badcf5035-14.20.2+7-g1badcf5035-2
4.20.3+127-gc42374a105-1
xen
SUSE:Linux Enterprise Server 15 SP6-LTSS
 before 4.18.5_20-150600.3.53.3
4.18.5_20-150600.3.53.3
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP6
 before 4.18.5_20-150600.3.53.3
4.18.5_20-150600.3.53.3
xen
SUSE:Linux Enterprise Micro 5.5
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
Show 21 moreShow less
Affected packages
PackageAffectedFixed
xen
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
xen
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
xen
SUSE:Linux Enterprise Server 15 SP5-LTSS
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP5
 before 4.17.6_14-150500.3.76.3
4.17.6_14-150500.3.76.3
xen
SUSE:Linux Enterprise Server 12 SP5-LTSS
 before 4.12.4_72-3.148.4
4.12.4_72-3.148.4
xen
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
 before 4.12.4_72-3.148.4
4.12.4_72-3.148.4
xen
SUSE:Linux Enterprise Micro 5.3
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise Micro 5.4
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise Server 15 SP4-LTSS
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
 before 4.16.7_12-150400.4.89.3
4.16.7_12-150400.4.89.3
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP7
 before 4.20.4_04-150700.3.46.1
4.20.4_04-150700.3.46.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP7
 before 4.20.4_04-150700.3.46.1
4.20.4_04-150700.3.46.1
xen
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.5.1-0ubuntu14.5.1-0ubuntu24.6.0-1ubuntu14.6.0-1ubuntu24.6.0-1ubuntu4
Show 7 moreShow less
4.6.0-1ubuntu4.14.6.0-1ubuntu4.24.6.0-1ubuntu4.34.6.5-0ubuntu14.6.5-0ubuntu1.14.6.5-0ubuntu1.24.6.5-0ubuntu1.4
 None known
xen
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.9.0-0ubuntu34.9.0-0ubuntu44.9.2-0ubuntu1
 None known
xen
Ubuntu:20.04:LTS
 All versions, plus listed versions
4.9.2-0ubuntu24.9.2-0ubuntu64.9.2-0ubuntu74.11.3+24-g14b62ab3e5-1ubuntu14.11.3+24-g14b62ab3e5-1ubuntu24.11.3+24-g14b62ab3e5-1ubuntu2.24.11.3+24-g14b62ab3e5-1ubuntu2.3
 None known
xen
Ubuntu:22.04:LTS
 All versions, plus listed versions
4.11.4+24-gddaaccbbab-1ubuntu24.16.0-1~ubuntu24.16.0-1~ubuntu2.1
 None known
xen
Ubuntu:24.04:LTS
 All versions, plus listed versions
4.17.2-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1ubuntu14.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.1ubuntu24.17.3+10-g091466ba55-1.1ubuntu3
 None known
xen
Ubuntu:26.10
 All versions, plus listed versions
4.20.2+7-g1badcf5035-2build24.20.2+37-g61ff35323e-1ubuntu14.20.3+127-gc42374a105-1
 None known
xen
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.20.0+68-g35cb38b222-14.20.2+7-g1badcf5035-24.20.2+7-g1badcf5035-2build2
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-62425 is a medium vulnerability (CVSS 5.5) in Xen, published July 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 9th percentile. Fixed in xen 4.19.6-r0.

References

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