Vulnerability-Lookup

GHSA-QFVQ-GGC7-JQGW

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-22 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

netfs: Fix read abandonment during retry

Under certain circumstances, all the remaining subrequests from a read request will get abandoned during retry. The abandonment process expects the 'subreq' variable to be set to the place to start abandonment from, but it doesn't always have a useful value (it will be uninitialised on the first pass through the loop and it may point to a deleted subrequest on later passes).

Fix the first jump to "abandon:" to set subreq to the start of the first subrequest expected to need retry (which, in this abandonment case, turned out unexpectedly to no longer have NEED_RETRY set).

Also clear the subreq pointer after discarding superfluous retryable subrequests to cause an oops if we do try to access it.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31435"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix read abandonment during retry\n\nUnder certain circumstances, all the remaining subrequests from a read\nrequest will get abandoned during retry.  The abandonment process expects\nthe \u0027subreq\u0027 variable to be set to the place to start abandonment from, but\nit doesn\u0027t always have a useful value (it will be uninitialised on the\nfirst pass through the loop and it may point to a deleted subrequest on\nlater passes).\n\nFix the first jump to \"abandon:\" to set subreq to the start of the first\nsubrequest expected to need retry (which, in this abandonment case, turned\nout unexpectedly to no longer have NEED_RETRY set).\n\nAlso clear the subreq pointer after discarding superfluous retryable\nsubrequests to cause an oops if we do try to access it.",
  "id": "GHSA-qfvq-ggc7-jqgw",
  "modified": "2026-04-22T15:31:40Z",
  "published": "2026-04-22T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31435"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e5fd8f53b575ff2188f82071da19c977ca56c41"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7e57523490cd2efb52b1ea97f2e0a74c0fb634cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f2f2bd128a8d9edbc1e785760da54ada3df69b7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31435 (GCVE-0-2026-31435)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:53 – Updated: 2026-04-22 13:53

Title

netfs: Fix read abandonment during retry

Summary

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix read abandonment during retry Under certain circumstances, all the remaining subrequests from a read request will get abandoned during retry. The abandonment process expects the 'subreq' variable to be set to the place to start abandonment from, but it doesn't always have a useful value (it will be uninitialised on the first pass through the loop and it may point to a deleted subrequest on later passes). Fix the first jump to "abandon:" to set subreq to the start of the first subrequest expected to need retry (which, in this abandonment case, turned out unexpectedly to no longer have NEED_RETRY set). Also clear the subreq pointer after discarding superfluous retryable subrequests to cause an oops if we do try to access it.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3e5fd8f53b575ff21…
	https://git.kernel.org/stable/c/8f2f2bd128a8d9edb…
	https://git.kernel.org/stable/c/7e57523490cd2efb5…

Impacted products

Vendor

Product

Version

Linux

Affected: ee4cdf7ba857a894ad1650d6ab77669cbbfa329e , < 3e5fd8f53b575ff2188f82071da19c977ca56c41 (git)
Affected: ee4cdf7ba857a894ad1650d6ab77669cbbfa329e , < 8f2f2bd128a8d9edbc1e785760da54ada3df69b7 (git)
Affected: ee4cdf7ba857a894ad1650d6ab77669cbbfa329e , < 7e57523490cd2efb52b1ea97f2e0a74c0fb634cd (git)

Linux

Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/read_retry.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3e5fd8f53b575ff2188f82071da19c977ca56c41",
              "status": "affected",
              "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
              "versionType": "git"
            },
            {
              "lessThan": "8f2f2bd128a8d9edbc1e785760da54ada3df69b7",
              "status": "affected",
              "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
              "versionType": "git"
            },
            {
              "lessThan": "7e57523490cd2efb52b1ea97f2e0a74c0fb634cd",
              "status": "affected",
              "version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/read_retry.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix read abandonment during retry\n\nUnder certain circumstances, all the remaining subrequests from a read\nrequest will get abandoned during retry.  The abandonment process expects\nthe \u0027subreq\u0027 variable to be set to the place to start abandonment from, but\nit doesn\u0027t always have a useful value (it will be uninitialised on the\nfirst pass through the loop and it may point to a deleted subrequest on\nlater passes).\n\nFix the first jump to \"abandon:\" to set subreq to the start of the first\nsubrequest expected to need retry (which, in this abandonment case, turned\nout unexpectedly to no longer have NEED_RETRY set).\n\nAlso clear the subreq pointer after discarding superfluous retryable\nsubrequests to cause an oops if we do try to access it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:53:35.032Z",
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        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/7e57523490cd2efb52b1ea97f2e0a74c0fb634cd"
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      ],
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31435",
    "datePublished": "2026-04-22T13:53:35.032Z",
    "dateReserved": "2026-03-09T15:48:24.089Z",
    "dateUpdated": "2026-04-22T13:53:35.032Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-QFVQ-GGC7-JQGW

CVE-2026-31435 (GCVE-0-2026-31435)

Tags

Sightings

Nomenclature