Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpf_get_stackid The get_perf_callchain call needs disabled preemption plus we need it disabled as long as we access its returned trace entries buffer. Note the bpf_get_stackid_pe function is executed already with preemption disabled.
References6
- git.kernel.org/stable/c/01fc93f670b3e759413a4d574c18ccfc636d2728
- git.kernel.org/stable/c/15f1bd8574662f1b7b26aaa2e23ebf4066f0117d
- git.kernel.org/stable/c/18c71e4b65ee60b8611fc071bdd7159f10185117
- git.kernel.org/stable/c/c4efdc1d4cb3e9183e41a1b2a5e0901dbbb31cdf
- git.kernel.org/stable/c/ccf481d73bce6e851cec364fe831c86fe66877cf
- git.kernel.org/stable/c/e79a70c2e97ae36bbdd371f0ce88a525f7b49f01
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 7 · as of 8 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.