CVE-2023-1281

UAF in Linux kernel's tcindex (traffic control index filter) implementation

Published: 3/22/2023 Last updated: 3/5/2025 Reserved: 3/8/2023

Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-after-free when 'tcf_exts_exec()' is called with the destroyed tcf_ext. A local attacker user can use this vulnerability to elevate its privileges to root. This issue affects Linux Kernel: from 4.14 before git commit ee059170b1f7e94e55fa6cadee544e176a6e59c2.

CNA assigner: Google (14ed7db2-1595-443d-9d34-6215bf890778) Requested by: n/a

Metrics

Version	Score	Severity	Vector String
3.1	7.8	High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Opam packages affected (27)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes orun rawlink rawlink-eio rawlink-lwt shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (1)

Product	Vendor	Version
Linux Kernel	Linux	n/a

References (12)

Credits (1)

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