CVE-2026-74590

CVE CVE-2026-74590EUVD EUVD-2026-64527Published 2026-08-22T15:31:41.000ZLast changed 2026-08-25T05:40:17.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: fsverity: Fix bpf_get_fsverity_digest() dynptr assumptions The BPF verifier and the dynptr abstraction ensure that the memory space referenced by a dynptr remains valid. They do not, however, provide any guarantee that the contents of the memory are stable. kfuncs are expected to remain memory-safe even if concurrent modifications occur. bpf_get_fsverity_digest() didn't follow that: it could crash if arg->digest_size was concurrently modified. Fix that by using the known-good value hash_alg->digest_size instead. Also widen 'dynptr_sz' and 'out_digest_sz' to u64 to match the return type of __bpf_dynptr_size(). It doesn't appear that it can actually be more than INT_MAX currently (since __bpf_dynptr_data_rw() excludes file-based pointers), but the correct type might as well be used.

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 6.8; 67814c00de3161181cddd06c77aeaf86ac4cc584 <2a5cfcad1d56e26d645b7887b0ed24c371851525; 67814c00de3161181cddd06c77aeaf86ac4cc584 <1344b632cb5043e32939a84568125719111c5af3; patch: 7.2; 67814c00de3161181cddd06c77aeaf86ac4cc584 <5bd63cad9df4328a184c409fbdad4f17944bcdb8; 67814c00de3161181cddd06c77aeaf86ac4cc584 <3e8ec7c0387273329374f5c7bd61f5f38af71fe1; patch: 6.12.104; patch: 6.18.45; patch: 0; patch: 7.1.9

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

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