CVE-2024-26801: Bluetooth: Avoid potential use-after-free in hci_error_reset

Affected versions

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

• linux linux kernel4.0 and later · before 4.19.309
• linux linux kernel4.20 and later · before 5.4.271
• linux linux kernel5.5 and later · before 5.10.212
• linux linux kernel5.11 and later · before 5.15.151
• linux linux kernel5.16 and later · before 6.1.81
• linux linux kernel6.2 and later · before 6.6.21
• linux linux kernel6.7 and later · before 6.7.9
• linux linux kernel6.8

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

  • 4.0affected
  • c7741d16a57cbf97eebe53f27e8216b1ff20e20c and later · before e0b278650f07acf2e0932149183458468a731c03affected · git
  • c7741d16a57cbf97eebe53f27e8216b1ff20e20c and later · before 98fb98fd37e42fd4ce13ff657ea64503e24b6090affected · git
  • c7741d16a57cbf97eebe53f27e8216b1ff20e20c and later · before 6dd0a9dfa99f8990a08eb8fdd8e79bee31c7d8e2affected · git
  • c7741d16a57cbf97eebe53f27e8216b1ff20e20c and later · before da4569d450b193e39e87119fd316c0291b585d14affected · git
  • c7741d16a57cbf97eebe53f27e8216b1ff20e20c and later · before 45085686b9559bfbe3a4f41d3d695a520668f5e1affected · git
  • c7741d16a57cbf97eebe53f27e8216b1ff20e20c and later · before 2ab9a19d896f5a0dd386e1f001c5309bc35f433baffected · git
  • c7741d16a57cbf97eebe53f27e8216b1ff20e20c and later · before dd594cdc24f2e48dab441732e6dfcafd6b0711d1affected · git
  • c7741d16a57cbf97eebe53f27e8216b1ff20e20c and later · before 2449007d3f73b2842c9734f45f0aadb522daf592affected · git
  • before 4.0not 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-2024-26798Apr 4, 2024 · fbcon: always restore the old font data in fbcon_do_set_font()
  22Monitor
• ← EarlierCVE-2024-26800Apr 4, 2024 · tls: fix use-after-free on failed backlog decryption
  31Monitor
• Later →CVE-2024-26802Apr 4, 2024 · stmmac: Clear variable when destroying workqueue
  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.