CVE-2026-72107dm era: fix out-of-bounds memory access for non-zero start sector
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from eec40579d84873dfb7021eb24c50360f073237c5 before fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf; from eec40579d84873dfb7021eb24c50360f073237c5 before e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5; from eec40579d84873dfb7021eb24c50360f073237c5 before 9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f; from eec40579d84873dfb7021eb24c50360f073237c5 before 7e1822f83c5a1ee7b4a19e98edde8770a10b4c71; from eec40579d84873dfb7021eb24c50360f073237c5 before db5f9b4601f0012038e5a2628aedec2f47933380; from eec40579d84873dfb7021eb24c50360f073237c5 before 1fcb5e29dd7a5b85adb9d8b539911741d878e829; from eec40579d84873dfb7021eb24c50360f073237c5 before bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6; from eec40579d84873dfb7021eb24c50360f073237c5 before a868196f03c2b19418ae3d2b69e195d668a271e5 | CNA record |
References
- https://git.kernel.org/stable/c/fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf
- https://git.kernel.org/stable/c/e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5
- https://git.kernel.org/stable/c/9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f
- https://git.kernel.org/stable/c/7e1822f83c5a1ee7b4a19e98edde8770a10b4c71
- https://git.kernel.org/stable/c/db5f9b4601f0012038e5a2628aedec2f47933380
- https://git.kernel.org/stable/c/1fcb5e29dd7a5b85adb9d8b539911741d878e829
- https://git.kernel.org/stable/c/bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6
- https://git.kernel.org/stable/c/a868196f03c2b19418ae3d2b69e195d668a271e5
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.