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CVE-2026-22979 is a memory leak in the Linux kernel networking function skb_segment_list() when forwarding GRO-aggregated SKB_GSO_FRAGLIST packets. A change to GRO ownership handling orphaned fraglist entries by setting skb->sk to NULL, leaving the entire socket memory charge with the head socket buffer. However, segmentation continued subtracting each fragment's truesize from the parent buffer. This inconsistent accounting leaves sk_wmem_alloc non-zero after the head buffer is freed, preventing socket destruction and causing a persistent kernel memory leak. The fix removes the obsolete truesize adjustment while preserving skb_release_head_state() to release socket-buffer extension references.
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A Linux kernel socket-memory accounting flaw in skb_segment_list() affects forwarding of GRO-aggregated packets. Incorrect subtraction of fragment memory from the parent socket buffer prevents socket destruction, causing persistent memory leaks. The reference assigns CVSS v3 severity 5.5, with local access, low privileges, and high availability impact. Google COS kernel package updates address the vulnerability.
A Linux kernel vulnerability involving a memory leak in networking caused by incorrect GRO packet handling.
A Linux kernel networking vulnerability in skb_segment_list for GRO packets that causes incorrect socket memory accounting, preventing socket destruction and resulting in a persistent memory leak.
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.