CVE-2021-47368: enetc: Fix illegal access when reading affinity_hint

Affected versions

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

• linux linux kernel5.1 and later · before 5.4.150
• linux linux kernel5.5 and later · before 5.10.70
• linux linux kernel5.11 and later · before 5.14.9
• linux linux kernel5.15

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

  • 5.1affected
  • d4fd0404c1c95b17880f254ebfee3485693fa8ba and later · before 4c4c3052911b577920353a7646e4883d5da40c28affected · git
  • d4fd0404c1c95b17880f254ebfee3485693fa8ba and later · before 6c3f1b741c6c2914ea120e3a5790d3e900152f7baffected · git
  • d4fd0404c1c95b17880f254ebfee3485693fa8ba and later · before 6f329d9da2a5ae032fcde800a99b118124ed5270affected · git
  • d4fd0404c1c95b17880f254ebfee3485693fa8ba and later · before 7237a494decfa17d0b9d0076e6cee3235719de90affected · git
  • before 5.1not affected · semver
  • 5.4.150 and later · up to and including 5.4.*not affected · semver
  • 5.10.70 and later · up to and including 5.10.*not affected · semver
  • 5.14.9 and later · up to and including 5.14.*not affected · semver
  • 5.15 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-2021-47366May 21, 2024 · afs: Fix corruption in reads at fpos 2G-4G from an OpenAFS server
  22Monitor
• ← EarlierCVE-2021-47367May 21, 2024 · virtio-net: fix pages leaking when building skb in big mode
  22Monitor
• Later →CVE-2021-47369May 21, 2024 · s390/qeth: fix NULL deref in qeth_clear_working_pool_list()
  22Monitor

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.