CVE-2023-52483: mctp: perform route lookups under a RCU read-side lock

Affected versions

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

• linux linux kernel5.15 and later · before 5.15.137
• linux linux kernel5.16 and later · before 6.1.59
• linux linux kernel6.2 and later · before 6.5.8
• linux linux kernel6.6

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

  • 5.15affected
  • 889b7da23abf92faf34491df95733bda63639e32 and later · before 6c52b12159049046483fdb0c411a0a1869c41a67affected · git
  • 889b7da23abf92faf34491df95733bda63639e32 and later · before 1db0724a01b558feb1ecae551782add1951a114aaffected · git
  • 889b7da23abf92faf34491df95733bda63639e32 and later · before 2405f64a95a7a094eb24cba9bcfaffd1ea264de4affected · git
  • 889b7da23abf92faf34491df95733bda63639e32 and later · before 5093bbfc10ab6636b32728e35813cbd79feb063caffected · git
  • before 5.15not affected · semver
  • 5.15.137 and later · up to and including 5.15.*not affected · semver
  • 6.1.59 and later · up to and including 6.1.*not affected · semver
  • 6.5.8 and later · up to and including 6.5.*not affected · semver
  • 6.6 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-2023-52481Feb 29, 2024 · arm64: errata: Add Cortex-A520 speculative unprivileged load workaround
  18Monitor
• ← EarlierCVE-2023-52482Feb 29, 2024 · x86/srso: Add SRSO mitigation for Hygon processors
  31Monitor
• Later →CVE-2023-52484Feb 29, 2024 · iommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range
  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.