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mtd: afs: validate v2 image info bounds

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: mtd: afs: validate v2 image info bounds The AFS v2 parser uses footer[8] to locate the image information block inside the current erase block, then uses the image information region_count to walk entries from a fixed local array. The footer offset and region count come from flash contents and are not checked against the erase block or the local image-info array before use. Reject v2 entries whose image information offset would underflow the erase block calculation, and reject region counts that cannot fit in the local image-info array before walking region entries.

Announced Source revision 1
Original source ↗

CVE-2026-89954

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-2026-89954

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": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
        "lessThan": "1bec05a68414cf8d0cab6cb42445b8603f32ffc4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
        "lessThan": "3ad8ff12fd44b08af9212ac4883a7e29d2ab7348",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
        "lessThan": "875daa3c750814ff2e2dc050239c390048f0bcd0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
        "lessThan": "da740539e8f370767317e24615349b9342a6e773",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
        "lessThan": "1edea8900ca3e405c1421d8b5c29f97107874f72",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
        "lessThan": "18916f475057cbd2fb8ea6ae86e6b85884ad1d53",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
        "lessThan": "d14e6298139f58a87a87d7022e26a7f37f0ddce7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b7cf5e2830bbb128699d7635ce8404b7f605bc95",
        "lessThan": "e9290031f736e99ad17c25c00311c92c266843b7",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/mtd/parsers/afs.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.2"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.2",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/mtd/parsers/afs.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89954

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#36395 · Revision 1
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Publisher date
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