Description
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.
Affected products
linux: linux kernel; redhat: enterprise linux; debian: debian linux
References8
- bugzilla.redhat.com/show_bug.cgi?id=2121800 ExploitIssue TrackingPatchThird Party Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2121800 ExploitIssue TrackingPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/11/msg00001.html Mailing ListThird Party Advisory
- lore.kernel.org/bpf/984b37f9fdf7ac36831d2137415a4a915744c1b6.16…
- lists.debian.org/debian-lts-announce/2022/11/msg00001.html Mailing ListThird Party Advisory
- lore.kernel.org/bpf/984b37f9fdf7ac36831d2137415a4a915744c1b6.16…
- cert-portal.siemens.com/productcert/html/ssa-794697.html
- cert-portal.siemens.com/productcert/html/ssa-831302.html
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 31 · as of 6 November 2026
- CWE
- CWE-125
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