CVE-2026-72423

CVE CVE-2026-72423EUVD EUVD-2026-59322Published 2026-08-15T05:56:41.000ZLast changed 2026-08-17T05:44:03.000ZCVSS 8.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: bpf: Guard conntrack opts error writes The conntrack lookup and allocation kfuncs take an opts pointer together with an opts__sz argument. The verifier checks only the memory range described by opts__sz, but the wrappers unconditionally write opts->error whenever the internal lookup or allocation helper returns an error. For an invalid size smaller than the end of opts->error, that write can land outside the verifier-checked range. Keep returning NULL for invalid arguments, but only report the error through opts->error when the supplied size includes the field. This preserves error reporting for the supported 12-byte and 16-byte layouts, and for other invalid sizes that still include opts->error.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux b4c2b9593a1c4c3a718370e34af28e817fd5e5c6 <dd74c80203842a21b2ebb9f70d1260d9aa20fa05; 5.18; patch: 7.1.5; patch: 7.2; b4c2b9593a1c4c3a718370e34af28e817fd5e5c6 <6f6183a39533d727deaa5061cadae6dd9e6744d0; patch: 0

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.