CVE-2024-56604: Bluetooth: RFCOMM: avoid leaving dangling sk pointer in rfcomm_sock_alloc()

Affected versions

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

• linux linux kernelbefore 6.1.120
• linux linux kernel6.2 and later · before 6.6.66
• linux linux kernel6.7 and later · before 6.12.5

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

  • 2.6.12affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before ac3eaac4cf142a15fe67be747a682b1416efeb6eaffected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6021ccc2471b7b95e29b7cfc7938e042bf56e281affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 32df687e129ef0f9afcbcc914f7c32deb28fd481affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 3945c799f12b8d1f49a3b48369ca494d981ac465affected · git
  • before 2.6.12not affected · semver
  • 6.1.120 and later · up to and including 6.1.*not affected · semver
  • 6.6.66 and later · up to and including 6.6.*not affected · semver
  • 6.12.5 and later · up to and including 6.12.*not affected · semver
  • 6.13 and laternot affected · original_commit_for_fix

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-2024-56602Dec 27, 2024 · net: ieee802154: do not leave a dangling sk pointer in ieee802154_create()
  31Monitor
• ← EarlierCVE-2024-56603Dec 27, 2024 · net: af_can: do not leave a dangling sk pointer in can_create()
  31Monitor
• Later →CVE-2024-56605Dec 27, 2024 · Bluetooth: L2CAP: do not leave dangling sk pointer on error in l2cap_sock_create()
  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.