Description
In the Linux kernel, the following vulnerability has been resolved: arm64: bpf: Only mitigate cBPF programs loaded by unprivileged users Support for eBPF programs loaded by unprivileged users is typically disabled. This means only cBPF programs need to be mitigated for BHB. In addition, only mitigate cBPF programs that were loaded by an unprivileged user. Privileged users can also load the same program via eBPF, making the mitigation pointless.
Affected products
linux: linux kernel; debian: debian linux
References9
- git.kernel.org/stable/c/038866e01ea5e5a3d948898ac216e531e7848669 Patch
- git.kernel.org/stable/c/477481c4348268136227348984b6699d6370b685 Patch
- git.kernel.org/stable/c/6e52d043f7dbf1839a24a3fab2b12b0d3839de7a Patch
- git.kernel.org/stable/c/80251f62028f1ab2e09be5ca3123f84e8b00389a Patch
- git.kernel.org/stable/c/df53d418709205450a02bb4d71cbfb4ff86f2c1e Patch
- git.kernel.org/stable/c/e5f5100f1c64ac6c72671b2cf6b46542fce93706 Patch
- git.kernel.org/stable/c/f300769ead032513a68e4a02e806393402e626f8 Patch
- lists.debian.org/debian-lts-announce/2025/08/msg00010.html Third Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html Third Party Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 10 · as of 7 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.