CVE-2024-35867: smb: client: fix potential UAF in cifs_stats_proc_show()

Affected versions

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

• debian debian linux11.0
• linux linux kernel4.20 and later · before 5.10.237
• linux linux kernel5.11 and later · before 5.15.181
• linux linux kernel5.16 and later · before 6.1.85
• linux linux kernel6.2 and later · before 6.6.26
• linux linux kernel6.7 and later · before 6.8.5
• linux linux kernel6.9

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

  • a67172a013953664b1dad03c648200c70b90506c, 3.13affected
  • 7f48558e6489d032b1584b0cc9ac4bb11072c034 and later · before 838ec01ea8d3deb5d123e8ed9022e8162dc3f503affected · git
  • 7f48558e6489d032b1584b0cc9ac4bb11072c034 and later · before bb6570085826291dc392005f9fec16ea5da3c8adaffected · git
  • 7f48558e6489d032b1584b0cc9ac4bb11072c034 and later · before 16b7d785775eb03929766819415055e367398f49affected · git
  • 7f48558e6489d032b1584b0cc9ac4bb11072c034 and later · before c3cf8b74c57924c0985e49a1fdf02d3395111f39affected · git
  • 7f48558e6489d032b1584b0cc9ac4bb11072c034 and later · before 1e12f0d5c66f07c934041621351973a116fa13c7affected · git
  • 7f48558e6489d032b1584b0cc9ac4bb11072c034 and later · before 0865ffefea197b437ba78b5dd8d8e256253efd65affected · git
  • 3.12.48 and later · before 3.13affected · semver
  • before 3.13not affected · semver
  • 5.10.237 and later · up to and including 5.10.*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-2024-35865May 19, 2024 · smb: client: fix potential UAF in smb2_is_valid_oplock_break()
  39Monitor
• ← EarlierCVE-2024-35866May 19, 2024 · smb: client: fix potential UAF in cifs_dump_full_key()
  31Monitor
• Later →CVE-2024-35868May 19, 2024 · smb: client: fix potential UAF in cifs_stats_proc_write()
  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.