CVE-2026-64354
CVE CVE-2026-64354EUVD EUVD-2026-48898Published 2026-07-25T08:50:12.000ZLast changed 2026-08-05T12:41:03.000ZCVSS 7.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: bpf: Validate BTF repeated field counts before expansion btf_parse_struct_metas() walks user-supplied BTF during BPF_BTF_LOAD, and btf_repeat_fields() expands repeatable fields from array elements into the fixed BTF_FIELDS_MAX scratch array used by btf_parse_fields(). The remaining-capacity check performs the expanded field count calculation in u32. A malformed BTF can wrap that calculation, causing the check to pass even when the expanded field count exceeds the scratch array capacity. The following memcpy() can then write past the end of the array. Use checked addition and multiplication before copying repeated fields and reject impossible counts.
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 6.11.6 <6.12; 797d73ee232dd1833dec4824bc53a22032e97c1c <ff77d013b737c0f77d925e2f2c59f0cf3d76bd35; 797d73ee232dd1833dec4824bc53a22032e97c1c <c5ff816d5f13900c3f1f3298cfcc61339e056e56; patch: 6.18.39; patch: 0; 797d73ee232dd1833dec4824bc53a22032e97c1c <cd407de2ef5dc70f1970b343ffaa16186340fdfd; patch: 7.1.4; patch: 6.12.96; patch: 7.2-rc1; 797d73ee232dd1833dec4824bc53a22032e97c1c <b9452b594fd3aecbfd4aa0a6a1f741330a37dab7; 6f957d972feee9b385ea3ae6530310a84e55ba71; 6.12
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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