CVE-2026-89567 (GCVE-0-2026-89567)
Vulnerability from cvelistv5
Published
2026-09-11 19:44
Modified
2026-10-21 12:47
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version: b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version: b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version: b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version: b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version: 9c31bb2684f8035beca0275349d19d679b679ffb
Version: 5fda50e262e65bd553ff777c4b280afd1495a18b
Version: 557fda9ed70ebf8eda2620ba3d746215285a1303
Version: 5.15.129   ≤
Version: 6.1.50   ≤
Version: 6.4.13   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/jbd2/checkpoint.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6b5366ba63a58819396045ab146bd37ff9e503c6",
              "status": "affected",
              "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
              "versionType": "git"
            },
            {
              "lessThan": "edf5fcd0469b7467bd5b37a79502c8d9c3257dbb",
              "status": "affected",
              "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
              "versionType": "git"
            },
            {
              "lessThan": "71c6b872c746465fa4b5def239cb296173ca8216",
              "status": "affected",
              "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
              "versionType": "git"
            },
            {
              "lessThan": "c2c0fb364685b8996c357d3b050394959b29d6e0",
              "status": "affected",
              "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
              "versionType": "git"
            },
            {
              "lessThan": "15cb16496446b94e67f7abcb049b8e2c75cd3d02",
              "status": "affected",
              "version": "b98dba273a0e47dbfade89c9af73c5b012a4eabb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9c31bb2684f8035beca0275349d19d679b679ffb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5fda50e262e65bd553ff777c4b280afd1495a18b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "557fda9ed70ebf8eda2620ba3d746215285a1303",
              "versionType": "git"
            },
            {
              "lessThan": "5.16",
              "status": "affected",
              "version": "5.15.129",
              "versionType": "semver"
            },
            {
              "lessThan": "6.2",
              "status": "affected",
              "version": "6.1.50",
              "versionType": "semver"
            },
            {
              "lessThan": "6.5",
              "status": "affected",
              "version": "6.4.13",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/jbd2/checkpoint.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.15.129",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.50",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.4.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: bound shrinker scans by examined checkpoint buffers\n\nThe jbd2 shrinker currently accounts only checkpoint buffers that it\nsuccessfully releases against nr_to_scan.  Busy buffers therefore do not\nconsume the scan budget.\n\nIf a checkpoint transaction contains mostly busy buffers, the shrinker\ncan scan its entire checkpoint list while holding journal-\u003ej_list_lock.\nLarge checkpoint lists can result in excessive lock hold times and leave\nother CPUs spinning on j_list_lock, causing soft lockups or RCU stalls.\n\nPass nr_to_scan into journal_shrink_one_cp_list() and decrement it for\nevery buffer examined, including busy buffers.  Pass NULL from checkpoint\ncleanup paths so their existing full-list behavior is preserved.\n\nThis restores the scan-budget semantics that existed before\njournal_shrink_one_cp_list() was changed to always scan a complete\ncheckpoint list."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:47:54.662Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6b5366ba63a58819396045ab146bd37ff9e503c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/edf5fcd0469b7467bd5b37a79502c8d9c3257dbb"
        },
        {
          "url": "https://git.kernel.org/stable/c/71c6b872c746465fa4b5def239cb296173ca8216"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2c0fb364685b8996c357d3b050394959b29d6e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/15cb16496446b94e67f7abcb049b8e2c75cd3d02"
        }
      ],
      "title": "jbd2: bound shrinker scans by examined checkpoint buffers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89567",
    "datePublished": "2026-09-11T19:44:37.332Z",
    "dateReserved": "2026-09-11T19:38:34.726Z",
    "dateUpdated": "2026-10-21T12:47:54.662Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.