CVE-2024-40956: dmaengine: idxd: Fix possible Use-After-Free in irq_process_work_list

Affected versions

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

• linux linux kernel5.11 and later · before 5.15.162
• linux linux kernel5.16 and later · before 6.1.96
• linux linux kernel6.2 and later · before 6.6.36
• linux linux kernel6.7 and later · before 6.9.7
• linux linux kernel6.10

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

  • 5.11affected
  • 16e19e11228ba660d9e322035635e7dcf160d5c2 and later · before 1b08bf5a17c66ab7dbb628df5344da53c8e7ab33affected · git
  • 16e19e11228ba660d9e322035635e7dcf160d5c2 and later · before 83163667d881100a485b6c2daa30301b7f68d9b5affected · git
  • 16e19e11228ba660d9e322035635e7dcf160d5c2 and later · before faa35db78b058a2ab6e074ee283f69fa398c36a8affected · git
  • 16e19e11228ba660d9e322035635e7dcf160d5c2 and later · before a14968921486793f2a956086895c3793761309ddaffected · git
  • 16e19e11228ba660d9e322035635e7dcf160d5c2 and later · before e3215deca4520773cd2b155bed164c12365149a7affected · git
  • before 5.11not affected · semver
  • 5.15.162 and later · up to and including 5.15.*not affected · semver
  • 6.1.96 and later · up to and including 6.1.*not affected · semver
  • 6.6.36 and later · up to and including 6.6.*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-2024-40954Jul 12, 2024 · net: do not leave a dangling sk pointer, when socket creation fails
  31Monitor
• ← EarlierCVE-2024-40955Jul 12, 2024 · ext4: fix slab-out-of-bounds in ext4_mb_find_good_group_avg_frag_lists()
  22Monitor
• Later →CVE-2024-40957Jul 12, 2024 · seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors
  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.