CVE-2026-90157
CVE CVE-2026-90157EUVD EUVD-2026-81750Published 2026-09-17T16:06:49.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject negative optlen in cgroup getsockopt hook A cgroup getsockopt BPF program can shrink ctx->optlen after the kernel getsockopt handler has run. The kernel-buffer variant, used by TCP_ZEROCOPY_RECEIVE, only rejects values larger than the original length. If BPF writes a negative optlen, that value is accepted and propagated back to the TCP getsockopt code. It can then be passed to copy_to_sockptr() as a size_t and trigger the hardened usercopy bytes > INT_MAX warning. Reject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(), matching the lower-bound validation already present in the sockptr-based getsockopt hook.
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 patch: 6.6.157; 9cacf81f8161111db25f98e78a7a0e32ae142b3f <31a89af4f513d750fec196e2bb6195a7d4473e9f; 9cacf81f8161111db25f98e78a7a0e32ae142b3f <1b5aacd5b2419b0790e955e466d389a61c79b4b1; 9cacf81f8161111db25f98e78a7a0e32ae142b3f <2bdbe00454200fcb0110f31eeca8d906a3515e74; patch: 6.18.52; 5.12; 9cacf81f8161111db25f98e78a7a0e32ae142b3f <d02a12b4085ffe41ea750b1007f7a9c7aee2875a; patch: 6.1.188; patch: 7.2.6; 08f61a34913558e06576e7b6318bf583f273c1be <5b09d984b38b018b123c3a9e02a96bbc6468dbe5; patch: 5.15.221; 5.10.188 <5.10.270; patch: 7.3-rc1; patch: 0; 9cacf81f8161111db25f98e78a7a0e32ae142b3f <e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2; 9cacf81f8161111db25f98e78a7a0e32ae142b3f <f68671b1a98d426c57864bd457c125fee14ac1a5; patch: 6.12.110; patch: 5.10.270; 9cacf81f8161111db25f98e78a7a0e32ae142b3f <554ba7195c4108726450e24480c8449990c2268c
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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