CVE-2026-45861: gfs2: Fix slab-use-after-free in qd_put

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 6.6affected
  • a475c5dd16e57c570113eccba51955b5df8bb052 and later · before 53aaf083de197946b25bc4ffa3068d37366ce73daffected · git
  • a475c5dd16e57c570113eccba51955b5df8bb052 and later · before ca7c67bdd293089b3483f18886d6b2d0037d2ad9affected · git
  • a475c5dd16e57c570113eccba51955b5df8bb052 and later · before 1d47922b98046b8070a77347fb883a6523792803affected · git
  • a475c5dd16e57c570113eccba51955b5df8bb052 and later · before 80fff26d7a0c3926b511661c27eecc811a420eefaffected · git
  • a475c5dd16e57c570113eccba51955b5df8bb052 and later · before 22150a7d401d9e9169b9b68e05bed95f7f49bf69affected · git
  • before 6.6not affected · semver
  • 6.6.160 and later · up to and including 6.6.*not affected · semver
  • 6.12.75 and later · up to and including 6.12.*not affected · semver
  • 6.18.14 and later · up to and including 6.18.*not affected · semver

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• linux linux kernel6.6 and later · before 6.12.75
• linux linux kernel6.13 and later · before 6.18.14
• linux linux kernel6.19 and later · before 6.19.4

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
  90Now
• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now

Published before and after this one in the same product

• ← EarlierCVE-2026-45859May 27, 2026 · netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation
  30Monitor
• ← EarlierCVE-2026-45860May 27, 2026 · netfilter: nf_conncount: increase the connection clean up limit to 64
  30Monitor
• Later →CVE-2026-45862May 27, 2026 · iommu/vt-d: Flush cache for PASID table before using it
  31Monitor

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.