CVE-2023-53426: xsk: Fix xsk_diag use-after-free error during socket cleanup

Affected versions

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

• linux linux kernel5.15.33 and later · before 5.15.132
• linux linux kernel5.16.19 and later · before 5.17
• linux linux kernel5.17.2 and later · before 6.1.54
• linux linux kernel6.2 and later · before 6.5.4

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

  • d1579253ffce39986e7a6ab757ac93b2680a665f, 8a2dea162b92c322f3e42eae0c4a74b8d20aa7a9, 5.18affected
  • ad7219cd8751bd258b9d1e69ae0654ec00f71875 and later · before 5979985f2d6b565b6cf0f79a62670a2855c0e96caffected · git
  • 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 and later · before 6436973164ea5506a495f39e56be5aea375e7832affected · git
  • 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 and later · before 595931912357fa3507e522a7f8a0a76e423c23e4affected · git
  • 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 and later · before 3e019d8a05a38abb5c85d4f1e85fda964610aa14affected · git
  • 5.15.33 and later · before 5.15.132affected · semver
  • 5.16.19 and later · before 5.17affected · semver
  • 5.17.2 and later · before 5.18affected · semver
  • before 5.18not affected · semver
  • 5.15.132 and later · up to and including 5.15.*not affected · semver

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-2023-53424Sep 18, 2025 · clk: mediatek: fix of_iomap memory leak
  22Monitor
• ← EarlierCVE-2023-53425Sep 18, 2025 · media: platform: mediatek: vpu: fix NULL ptr dereference
  22Monitor
• Later →CVE-2023-53427Sep 18, 2025 · cifs: Fix warning and UAF when destroy the MR list
  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.