CVE-2026-46056: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

Affected versions

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

• linux linux kernel3.7 and later · before 6.1.175
• linux linux kernel6.2 and later · before 6.6.140
• linux linux kernel6.7 and later · before 6.12.86
• linux linux kernel6.13 and later · before 6.18.27
• linux linux kernel6.19 and later · before 7.0.4

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

  • 3.7affected
  • 92a25256f142d55e25f9959441cea6ddeabae57e and later · before ea18732d2614557e59f4c0d8cdbe6611aeab33b7affected · git
  • 92a25256f142d55e25f9959441cea6ddeabae57e and later · before d28311539ac9f65e29308ea219ecaa48aa5e76e5affected · git
  • 92a25256f142d55e25f9959441cea6ddeabae57e and later · before b6ae482f88654db407c8c17619d4b62959b903efaffected · git
  • 92a25256f142d55e25f9959441cea6ddeabae57e and later · before 204028af77a265e31ceb4ba7f643349a3cca72b2affected · git
  • 92a25256f142d55e25f9959441cea6ddeabae57e and later · before 01a6431766c35dfedb86e0cb5d3fc80c6d604a47affected · git
  • 92a25256f142d55e25f9959441cea6ddeabae57e and later · before e08d75753db17aa943d7622f09d9c217b5bfd3b8affected · git
  • 92a25256f142d55e25f9959441cea6ddeabae57e and later · before 8c6443bb9257b780986fb67ec08565bf48ecb8d7affected · git
  • 92a25256f142d55e25f9959441cea6ddeabae57e and later · before 85fa3512048793076eef658f66489112dcc91993affected · git
  • before 3.7not 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-2026-46052May 27, 2026 · ceph: only d_add() negative dentries when they are unhashed
  30Monitor
• ← EarlierCVE-2026-46054May 27, 2026 · selinux: fix overlayfs mmap() and mprotect() access checks
  28Monitor
• Later →CVE-2026-46059May 27, 2026 · KVM: nSVM: Always use NextRIP as vmcb02's NextRIP after first L2 VMRUN
  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.