dm era: fix out-of-bounds memory access for non-zero start sector

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72107
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:24 UTC
Updated2026-08-17 06:18:09 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: dm era: fix out-of-bounds memory access for non-zero start sector dm-era tracks writes in target-relative blocks, but era_map() calculates the writeset block before applying the target offset. Tables with a non-zero start sector can therefore pass an absolute mapped-device block to metadata_current_marked(). If the absolute block is beyond the current writeset size, writeset_marked() tests past the end of the in-core bitset. KASAN reports this as a vmalloc-out-of-bounds access. Apply the target offset before calculating the era block so writeset lookups use the target-relative block number.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.006320000 probability, percentile 0.473740000 (date 2026-08-17)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected eec40579d84873dfb7021eb24c50360f073237c5 fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf git Not specified
CNA Linux Linux affected eec40579d84873dfb7021eb24c50360f073237c5 e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5 git Not specified
CNA Linux Linux affected eec40579d84873dfb7021eb24c50360f073237c5 9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f git Not specified
CNA Linux Linux affected eec40579d84873dfb7021eb24c50360f073237c5 7e1822f83c5a1ee7b4a19e98edde8770a10b4c71 git Not specified
CNA Linux Linux affected eec40579d84873dfb7021eb24c50360f073237c5 db5f9b4601f0012038e5a2628aedec2f47933380 git Not specified
CNA Linux Linux affected eec40579d84873dfb7021eb24c50360f073237c5 1fcb5e29dd7a5b85adb9d8b539911741d878e829 git Not specified
CNA Linux Linux affected eec40579d84873dfb7021eb24c50360f073237c5 bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6 git Not specified
CNA Linux Linux affected eec40579d84873dfb7021eb24c50360f073237c5 a868196f03c2b19418ae3d2b69e195d668a271e5 git Not specified
CNA Linux Linux affected 3.15 Not specified
CNA Linux Linux unaffected 3.15 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7e1822f83c5a1ee7b4a19e98edde8770a10b4c71 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a868196f03c2b19418ae3d2b69e195d668a271e5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/db5f9b4601f0012038e5a2628aedec2f47933380 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1fcb5e29dd7a5b85adb9d8b539911741d878e829 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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