CVE-2026-90299

CVE CVE-2026-90299EUVD EUVD-2026-81892Published 2026-09-17T16:08:23.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix sleepable check for tracing/lsm prog When CONFIG_FUNCTION_ERROR_INJECTION is disabled, a sleepable tracing prog is allowed to attach to '__x64_'-alike prefix symbols. It is because the verifier does not verify whether the symbol is a kernel function or a bpf prog. That said, a sleepable tracing prog is allowed to attach to a bpf prog target whose name has '__x64_'-alike prefix. For example, a sleepable fentry prog attaches to a '__x64_sys_nop' XDP prog, and copies buffer from a user pointer with bpf_copy_from_user() helper. After attaching the XDP prog to lo interface, the kernel BUG could be triggered by 'ping -c 1 -W 1 127.0.0.1': [ 3.460756] BUG: sleeping function called from invalid context at kernel/bpf/trampoline.c:1324 Fix it by disallowing sleepable prog always when its target btf is not a kernel's btf.

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 16d9c5660692d6f0e6aba367274de2b6dfd4343c <00244bdaa423d93f4571f3f6854378ce3365e524; 16d9c5660692d6f0e6aba367274de2b6dfd4343c <976f1be72740cfbc351d3841fd21186dda3ea723; patch: 7.2.6; 7.1; patch: 0; patch: 7.3-rc1

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.