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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-72107

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-72107

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "eec40579d84873dfb7021eb24c50360f073237c5",
        "lessThan": "fe94a0b14010a3c267ff9a2508afb4f27ff1c5bf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "eec40579d84873dfb7021eb24c50360f073237c5",
        "lessThan": "e3ffa8e492e5cdee62d916ee3e9244ccce2b73c5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "eec40579d84873dfb7021eb24c50360f073237c5",
        "lessThan": "9946a7176bd8c25ddd6e5f1799c54e572ee6bf0f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "eec40579d84873dfb7021eb24c50360f073237c5",
        "lessThan": "7e1822f83c5a1ee7b4a19e98edde8770a10b4c71",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "eec40579d84873dfb7021eb24c50360f073237c5",
        "lessThan": "db5f9b4601f0012038e5a2628aedec2f47933380",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "eec40579d84873dfb7021eb24c50360f073237c5",
        "lessThan": "1fcb5e29dd7a5b85adb9d8b539911741d878e829",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "eec40579d84873dfb7021eb24c50360f073237c5",
        "lessThan": "bafe3e720cdac38cd7ea4eb7852a8f2dbe1bbfe6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "eec40579d84873dfb7021eb24c50360f073237c5",
        "lessThan": "a868196f03c2b19418ae3d2b69e195d668a271e5",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/md/dm-era-target.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/md/dm-era-target.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72107

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41875 · Revision 1
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Publisher date
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