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Squashfs: check metadata block offset is within range

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Squashfs: check metadata block offset is within range Syzkaller reports a "general protection fault in squashfs_copy_data" This is ultimately caused by a corrupted index look-up table, which produces a negative metadata block offset. This is subsequently passed to squashfs_copy_data (via squashfs_read_metadata) where the negative offset causes an out of bounds access. The fix is to check that the offset is within range in squashfs_read_metadata. This will trap this and other cases.

Announced Source revision 1
Original source ↗

CVE-2026-23388

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-2026-23388

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": "f400e12656ab518be107febfe2315fb1eab5a342",
        "lessThan": "60f679f643f3f36a8571ea585e4ce5d93ef952b5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f400e12656ab518be107febfe2315fb1eab5a342",
        "lessThan": "3f68a9457a6190814377577374da75f872e0a013",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f400e12656ab518be107febfe2315fb1eab5a342",
        "lessThan": "0c8ab092aec3ac4294940054772d30b511b16713",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f400e12656ab518be107febfe2315fb1eab5a342",
        "lessThan": "6b847d65f5b0065e02080c61fad93d57d6686383",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f400e12656ab518be107febfe2315fb1eab5a342",
        "lessThan": "9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f400e12656ab518be107febfe2315fb1eab5a342",
        "lessThan": "01ee0bcc29864b78249308e8b35042b09bbf5fe3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f400e12656ab518be107febfe2315fb1eab5a342",
        "lessThan": "3b9499e7d677dd4366239a292238489a804936b2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f400e12656ab518be107febfe2315fb1eab5a342",
        "lessThan": "fdb24a820a5832ec4532273282cbd4f22c291a0d",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/squashfs/cache.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.29"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.29",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.253",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.203",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.167",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.130",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.77",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.17",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.7",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/squashfs/cache.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23388

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#27245 · Revision 1
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Publisher date
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