CVE-2026-72107

In 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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1fcb5e29dd7a5b85adb9d8b539911741d878e829
https://git.kernel.org/stable/c/7e1822f83c5a1ee7b4a19e98edde8770a10b4c71
https://git.kernel.org/stable/c/9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f
https://git.kernel.org/stable/c/a868196f03c2b19418ae3d2b69e195d668a271e5
https://git.kernel.org/stable/c/bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6
https://git.kernel.org/stable/c/db5f9b4601f0012038e5a2628aedec2f47933380
https://git.kernel.org/stable/c/e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5
https://git.kernel.org/stable/c/fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:21

Updated : 2026-08-17 06:18

NVD link : CVE-2026-72107

Mitre link : CVE-2026-72107

CVE.ORG link : CVE-2026-72107

JSON object : View

Products Affected

No product.

CWE

No CWE.

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Tables with a\nnon-zero start sector can therefore pass an absolute mapped-device block\nto metadata_current_marked().\n\nIf the absolute block is beyond the current writeset size,\nwriteset_marked() tests past the end of the in-core bitset. KASAN reports\nthis as a vmalloc-out-of-bounds access.\n\nApply the target offset before calculating the era block so writeset\nlookups use the target-relative block number."}], "lastModified": "2026-08-17T06:18:09.717", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}