An out-of-bounds memory read flaw was found in the Linux kernel's BPF subsystem in how a user calls the bpf_tail_call function with a key larger than the max_entries of the map. This flaw allows a local user to gain unauthorized access to data.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://bugzilla.redhat.com/show_bug.cgi?id=2121800 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2121800 Exploit, Issue Tracking, Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · linux, redhat, debianNVD modified 2026-10-14 14:17
Affected (CPE criteria) 6
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
References 8
- https://bugzilla.redhat.com/show_bug.cgi?id=2121800 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html Mailing List, Third Party Advisory
- https://lore.kernel.org/bpf/984b37f9fdf7ac36831d2137415a4a915744c1b6.1661462653.git.daniel%40iogearbox.net/
- https://bugzilla.redhat.com/show_bug.cgi?id=2121800 Exploit, Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html Mailing List, Third Party Advisory
- https://lore.kernel.org/bpf/984b37f9fdf7ac36831d2137415a4a915744c1b6.1661462653.git.daniel%40iogearbox.net/
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
- https://cert-portal.siemens.com/productcert/html/ssa-831302.html