Skip to content
Heist/ feed
Unrated

jbd2: bound shrinker scans by examined checkpoint buffers

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: jbd2: bound shrinker scans by examined checkpoint buffers The jbd2 shrinker currently accounts only checkpoint buffers that it successfully releases against nr_to_scan. Busy buffers therefore do not consume the scan budget. If a checkpoint transaction contains mostly busy buffers, the shrinker can scan its entire checkpoint list while holding journal->j_list_lock. Large checkpoint lists can result in excessive lock hold times and leave other CPUs spinning on j_list_lock, causing soft lockups or RCU stalls. Pass nr_to_scan into journal_shrink_one_cp_list() and decrement it for every buffer examined, including busy buffers. Pass NULL from checkpoint cleanup paths so their existing full-list behavior is preserved. This restores the scan-budget semantics that existed before journal_shrink_one_cp_list() was changed to always scan a complete checkpoint list.

Announced Source revision 1
Original source ↗

CVE-2026-89567

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-2026-89567

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": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
        "lessThan": "6b5366ba63a58819396045ab146bd37ff9e503c6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
        "lessThan": "edf5fcd0469b7467bd5b37a79502c8d9c3257dbb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
        "lessThan": "71c6b872c746465fa4b5def239cb296173ca8216",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
        "lessThan": "c2c0fb364685b8996c357d3b050394959b29d6e0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
        "lessThan": "15cb16496446b94e67f7abcb049b8e2c75cd3d02",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9c31bb2684f8035beca0275349d19d679b679ffb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5fda50e262e65bd553ff777c4b280afd1495a18b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "557fda9ed70ebf8eda2620ba3d746215285a1303",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.15.129",
        "lessThan": "5.16",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.1.50",
        "lessThan": "6.2",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.4.13",
        "lessThan": "6.5",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "fs/jbd2/checkpoint.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.5"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.5",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "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/jbd2/checkpoint.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89567

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#46682 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement