CVE-2025-21979: wifi: cfg80211: cancel wiphy_work before freeing wiphy

Affected versions

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

• linux linux kernel6.1.57 and later · before 6.1.132
• linux linux kernel6.5 and later · before 6.6.84
• linux linux kernel6.7 and later · before 6.12.20
• linux linux kernel6.13 and later · before 6.13.8
• linux linux kernel6.14

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

  • 6.5affected
  • ddb1bfbf4ab5c753954d0cd728253b642934a9f2 and later · before 8930a3e1568cf534f86c8ed2def817c6d0528fc1affected · git
  • 3fcc6d7d5f40dad56dee7bde787b7e23edd4b93c and later · before 0272d4af7f92997541d8bbf4c51918b93ded6ee2affected · git
  • a3ee4dc84c4e9d14cb34dad095fd678127aca5b6 and later · before 75d262ad3c36d52852d764588fcd887f0fcd9138affected · git
  • a3ee4dc84c4e9d14cb34dad095fd678127aca5b6 and later · before a5158d67bff06cb6fea31be39aeb319fd908ed8eaffected · git
  • a3ee4dc84c4e9d14cb34dad095fd678127aca5b6 and later · before dea22de162058216a90f2706f0d0b36f0ff309fdaffected · git
  • a3ee4dc84c4e9d14cb34dad095fd678127aca5b6 and later · before 72d520476a2fab6f3489e8388ab524985d6c4b90affected · git
  • 6.1.57 and later · before 6.1.132affected · semver
  • before 6.5not affected · semver
  • 6.1.132 and later · up to and including 6.1.*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-2025-21968Apr 1, 2025 · drm/amd/display: Fix slab-use-after-free on hdcp_work
  31Monitor
• ← EarlierCVE-2025-21977Apr 1, 2025 · fbdev: hyperv_fb: Fix hang in kdump kernel when on Hyper-V Gen 2 VMs
  22Monitor
• Later →CVE-2025-21980Apr 1, 2025 · sched: address a potential NULL pointer dereference in the GRED scheduler.
  22Monitor

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.