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ecryptfs: pass packet set buffer size to parser

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ecryptfs: pass packet set buffer size to parser ecryptfs_parse_packet_set() receives a pointer into the file header, but it calculates the remaining packet buffer size from PAGE_SIZE - 8. For version 1 headers the packet set starts later in the header, so this can overstate the available buffer. Pass the actual packet set buffer length from the caller and calculate per-packet limits from the remaining bytes in that buffer. Recompute the remaining length after consuming a tag 3 packet before parsing the following tag 11 packet.

Announced Source revision 1
Original source ↗

CVE-2026-89608

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-2026-89608

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": "237fead619984cc48818fe12ee0ceada3f55b012",
        "lessThan": "e7573b0e3058c6bbdfe81673f22c09900fde9e65",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "237fead619984cc48818fe12ee0ceada3f55b012",
        "lessThan": "66a87559ecb26afe80ad512faf728a158e2b81da",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "237fead619984cc48818fe12ee0ceada3f55b012",
        "lessThan": "3bd9bb3e167a7c14a50423f6ff03ee0fb007199d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "237fead619984cc48818fe12ee0ceada3f55b012",
        "lessThan": "749fa08d8f1b318bd8f4669a14a8a4a8c1bbdaac",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "237fead619984cc48818fe12ee0ceada3f55b012",
        "lessThan": "329de8b9e988b152b938f09224670d97bada0b96",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "237fead619984cc48818fe12ee0ceada3f55b012",
        "lessThan": "e5d254e654f2311a3c4b9c791d7f216554bcd17a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "237fead619984cc48818fe12ee0ceada3f55b012",
        "lessThan": "747fd45be396a6aea3420ab657a0ab4e60185b05",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "237fead619984cc48818fe12ee0ceada3f55b012",
        "lessThan": "2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/ecryptfs/crypto.c",
      "fs/ecryptfs/ecryptfs_kernel.h",
      "fs/ecryptfs/keystore.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.19"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.19",
        "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": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/ecryptfs/crypto.c",
      "fs/ecryptfs/ecryptfs_kernel.h",
      "fs/ecryptfs/keystore.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89608

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#35115 · Revision 1
Added to Heist Feed
Publisher date
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