Vulnerability-Lookup

GHSA-73JC-99JJ-CH5V

Vulnerability from github – Published: 2026-04-03 18:31 – Updated: 2026-04-03 18:31

Details

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

sunrpc: fix cache_request leak in cache_release

When a reader's file descriptor is closed while in the middle of reading a cache_request (rp->offset != 0), cache_release() decrements the request's readers count but never checks whether it should free the request.

In cache_read(), when readers drops to 0 and CACHE_PENDING is clear, the cache_request is removed from the queue and freed along with its buffer and cache_head reference. cache_release() lacks this cleanup.

The only other path that frees requests with readers == 0 is cache_dequeue(), but it runs only when CACHE_PENDING transitions from set to clear. If that transition already happened while readers was still non-zero, cache_dequeue() will have skipped the request, and no subsequent call will clean it up.

Add the same cleanup logic from cache_read() to cache_release(): after decrementing readers, check if it reached 0 with CACHE_PENDING clear, and if so, dequeue and free the cache_request.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31400"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-03T16:16:38Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: fix cache_request leak in cache_release\n\nWhen a reader\u0027s file descriptor is closed while in the middle of reading\na cache_request (rp-\u003eoffset != 0), cache_release() decrements the\nrequest\u0027s readers count but never checks whether it should free the\nrequest.\n\nIn cache_read(), when readers drops to 0 and CACHE_PENDING is clear, the\ncache_request is removed from the queue and freed along with its buffer\nand cache_head reference. cache_release() lacks this cleanup.\n\nThe only other path that frees requests with readers == 0 is\ncache_dequeue(), but it runs only when CACHE_PENDING transitions from\nset to clear. If that transition already happened while readers was\nstill non-zero, cache_dequeue() will have skipped the request, and no\nsubsequent call will clean it up.\n\nAdd the same cleanup logic from cache_read() to cache_release(): after\ndecrementing readers, check if it reached 0 with CACHE_PENDING clear,\nand if so, dequeue and free the cache_request.",
  "id": "GHSA-73jc-99jj-ch5v",
  "modified": "2026-04-03T18:31:23Z",
  "published": "2026-04-03T18:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31400"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17ad31b3a43b72aec3a3d83605891e1397d0d065"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/301670dcd098c1fe5c2fe90fb3c7a8f4814d2351"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/373457de14281c1fc7cace6fc4c8a267fc176673"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41f6ba6c98a618043d2cd71030bf9a752dfab8b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7bcd5e318876ac638c8ceade7a648e76ac8c48e1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be5c35960e5ead70862736161836e2d1bc7352dc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31400 (GCVE-0-2026-31400)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:16 – Updated: 2026-04-03 15:16

Title

sunrpc: fix cache_request leak in cache_release

Summary

In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix cache_request leak in cache_release When a reader's file descriptor is closed while in the middle of reading a cache_request (rp->offset != 0), cache_release() decrements the request's readers count but never checks whether it should free the request. In cache_read(), when readers drops to 0 and CACHE_PENDING is clear, the cache_request is removed from the queue and freed along with its buffer and cache_head reference. cache_release() lacks this cleanup. The only other path that frees requests with readers == 0 is cache_dequeue(), but it runs only when CACHE_PENDING transitions from set to clear. If that transition already happened while readers was still non-zero, cache_dequeue() will have skipped the request, and no subsequent call will clean it up. Add the same cleanup logic from cache_read() to cache_release(): after decrementing readers, check if it reached 0 with CACHE_PENDING clear, and if so, dequeue and free the cache_request.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/7bcd5e318876ac638…
	https://git.kernel.org/stable/c/41f6ba6c98a618043…
	https://git.kernel.org/stable/c/301670dcd098c1fe5…
	https://git.kernel.org/stable/c/be5c35960e5ead708…
	https://git.kernel.org/stable/c/373457de14281c1fc…
	https://git.kernel.org/stable/c/17ad31b3a43b72aec…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7bcd5e318876ac638c8ceade7a648e76ac8c48e1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 41f6ba6c98a618043d2cd71030bf9a752dfab8b2 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 301670dcd098c1fe5c2fe90fb3c7a8f4814d2351 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < be5c35960e5ead70862736161836e2d1bc7352dc (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 373457de14281c1fc7cace6fc4c8a267fc176673 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 17ad31b3a43b72aec3a3d83605891e1397d0d065 (git)

Linux

Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc5 , ≤ * (original_commit_for_fix)

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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
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          "nodes": [
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        },
        {
          "url": "https://git.kernel.org/stable/c/17ad31b3a43b72aec3a3d83605891e1397d0d065"
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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-73JC-99JJ-CH5V

CVE-2026-31400 (GCVE-0-2026-31400)

Tags

Sightings

Nomenclature