Vulnerability-Lookup

FKIE_CVE-2026-31400

Vulnerability from fkie_nvd - Published: 2026-04-03 16:16 - Updated: 2026-05-20 12:31

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/17ad31b3a43b72aec3a3d83605891e1397d0d065	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1dfedb293943e491379c9302b428e6f920a73d12	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/301670dcd098c1fe5c2fe90fb3c7a8f4814d2351	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/373457de14281c1fc7cace6fc4c8a267fc176673	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/41f6ba6c98a618043d2cd71030bf9a752dfab8b2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7bcd5e318876ac638c8ceade7a648e76ac8c48e1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/be5c35960e5ead70862736161836e2d1bc7352dc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f18c1f2a88ca91357916997cdb0f7adaf14fc497	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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          "confidentialityImpact": "NONE",
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CVE-2026-31400 (GCVE-0-2026-31400)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:16 – Updated: 2026-05-11 22:07

Title

sunrpc: fix cache_request leak in cache_release

Summary

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/1dfedb293943e4913…
https://git.kernel.org/stable/c/f18c1f2a88ca91357…
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

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1dfedb293943e491379c9302b428e6f920a73d12 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f18c1f2a88ca91357916997cdb0f7adaf14fc497 (git) 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	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (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 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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        {
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          "programFiles": [
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:07:57.975Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/7bcd5e318876ac638c8ceade7a648e76ac8c48e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/41f6ba6c98a618043d2cd71030bf9a752dfab8b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/301670dcd098c1fe5c2fe90fb3c7a8f4814d2351"
        },
        {
          "url": "https://git.kernel.org/stable/c/be5c35960e5ead70862736161836e2d1bc7352dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/373457de14281c1fc7cace6fc4c8a267fc176673"
        },
        {
          "url": "https://git.kernel.org/stable/c/17ad31b3a43b72aec3a3d83605891e1397d0d065"
        }
      ],
      "title": "sunrpc: fix cache_request leak in cache_release",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31400",
    "datePublished": "2026-04-03T15:16:03.906Z",
    "dateReserved": "2026-03-09T15:48:24.086Z",
    "dateUpdated": "2026-05-11T22:07:57.975Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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

FKIE_CVE-2026-31400

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

Tags

Sightings

Nomenclature