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CVE-2022-36879 is an improper reference-count update in the Linux kernel XFRM packet-transformation subsystem. While resolving policies in xfrm_bundle_lookup, xfrm_expand_policies in net/xfrm/xfrm_policy.c can drop a reference count twice. The issue affects Linux kernel versions through 5.18.14 and may result in an erroneous object lifetime condition.
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A Linux kernel double reference-count decrement flaw in xfrm_expand_policies that affects Linux kernel versions through 5.18.14 and can cause a denial of service through availability impact.
Unknown.
A Linux kernel vulnerability addressed by this advisory; no technical detail is supplied.
A Linux kernel xfrm policy handling flaw in which xfrm_expand_policies() can drop a reference count twice.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.