CVE-2024-56558: nfsd: make sure exp active before svc_export_show

Affected versions

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

• linux linux kernel3.17 and later · before 5.4.287
• linux linux kernel5.5 and later · before 5.10.231
• linux linux kernel5.11 and later · before 5.15.174
• linux linux kernel5.16 and later · before 6.1.120
• linux linux kernel6.2 and later · before 6.6.64
• linux linux kernel6.7 and later · before 6.12.4

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

  • 3.17affected
  • bf18f163e89c52e09c96534db45c4274273a0b34 and later · before e2fa0d0e327279a8defb87b263cd0bf288fd9261affected · git
  • bf18f163e89c52e09c96534db45c4274273a0b34 and later · before 7fd29d284b55c2274f7a748e6c5f25b4758b8da5affected · git
  • bf18f163e89c52e09c96534db45c4274273a0b34 and later · before 6cefcadd34e3c71c81ea64b899a0daa86314a51aaffected · git
  • bf18f163e89c52e09c96534db45c4274273a0b34 and later · before 7d8f7816bebcd2e7400bb4d786eccb8f33c9f9ecaffected · git
  • bf18f163e89c52e09c96534db45c4274273a0b34 and later · before 1cecfdbc6bfc89c516d286884c7f29267b95de2baffected · git
  • bf18f163e89c52e09c96534db45c4274273a0b34 and later · before 7365d1f8de63cffdbbaa2287ce0205438e1a922faffected · git
  • bf18f163e89c52e09c96534db45c4274273a0b34 and later · before be8f982c369c965faffa198b46060f8853e0f1f0affected · git
  • before 3.17not affected · semver
  • 5.4.287 and later · up to and including 5.4.*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-2024-56556Dec 27, 2024 · binder: fix node UAF in binder_add_freeze_work()
  28Monitor
• ← EarlierCVE-2024-56557Dec 27, 2024 · iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer
  31Monitor
• Later →CVE-2024-56559Dec 27, 2024 · mm/vmalloc: combine all TLB flush operations of KASAN shadow virtual address into one operation
  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.