CVE-2026-45859: netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation

Affected versions

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

• linux linux kernel5.15.166 and later · before 5.16
• linux linux kernel6.1.107 and later · before 6.2
• linux linux kernel6.6.48 and later · before 6.7
• linux linux kernel6.10.7 and later · before 6.11
• linux linux kernel6.11.1 and later · before 6.12.75
• linux linux kernel6.13 and later · before 6.18.14
• linux linux kernel6.19 and later · before 6.19.4
• linux linux kernel6.11

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

  • 6c4a0ba674f410ab99a30a16f32dac0ebfed5cd3, 025b3326c5c409b372d0103ad30f174e55adbd1b, 6.11affected
  • 6dcc8ba8a6074bb79040f502dc66ad23a58a1c86 and later · before 4666688657e1054278b836b825fb88b2907e2da2affected · git
  • 74e6eb7fd27ef1ccc68041dbc66e6d80d2e4a1a0 and later · before aead84bdacd77e08357fd718e5dcaffaf387f3c3affected · git
  • 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb and later · before 79b713ef4261a8ead96af4703f89d0b5f25532e2affected · git
  • 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb and later · before 23901aa6b8a2f294c4b774436b4691f3ff863a8faffected · git
  • 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb and later · before b740e7ddd7ca0dbfeafca3f5e52717206cf28524affected · git
  • 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb and later · before 207b3ebacb6113acaaec0d171d5307032c690004affected · git
  • 6.1.107 and later · before 6.1.191affected · semver
  • 6.6.48 and later · before 6.6.160affected · semver
  • 5.15.166 and later · before 5.16affected · 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-2026-45855May 27, 2026 · ata: libata-scsi: avoid Non-NCQ command starvation
  22Monitor
• ← EarlierCVE-2026-45856May 27, 2026 · RDMA/uverbs: Validate wqe_size before using it in ib_uverbs_post_send
  28Monitor
• Later →CVE-2026-45860May 27, 2026 · netfilter: nf_conncount: increase the connection clean up limit to 64
  30Monitor

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.