CVE-2024-53179: smb: client: fix use-after-free of signing key

Affected versions

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

• linux linux kernelbefore 6.6.70
• linux linux kernel6.7 and later · before 6.12.2

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

  • 3.12affected
  • 32811d242ff6f28da2ab18c90a15e32fd958e774 and later · before 0944c2596c2a3442735b5bb6714a17a16188a68faffected · git
  • 32811d242ff6f28da2ab18c90a15e32fd958e774 and later · before 39619c65ab4bbb3e78c818f537687653e112764daffected · git
  • 32811d242ff6f28da2ab18c90a15e32fd958e774 and later · before 0e2b654a3848bf9da3b0d54c1ccf3f1b8c635591affected · git
  • 32811d242ff6f28da2ab18c90a15e32fd958e774 and later · before 343d7fe6df9e247671440a932b6a73af4fa86d95affected · git
  • before 3.12not affected · semver
  • 6.1.191 and later · up to and including 6.1.*not affected · semver
  • 6.6.70 and later · up to and including 6.6.*not affected · semver
  • 6.12.2 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-2024-53177Dec 27, 2024 · smb: prevent use-after-free due to open_cached_dir error paths
  39Monitor
• ← EarlierCVE-2024-53178Dec 27, 2024 · smb: Don't leak cfid when reconnect races with open_cached_dir
  18Monitor
• Later →CVE-2024-53187Dec 27, 2024 · io_uring: check for overflows in io_pin_pages
  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.