CVE-2023-46813

Name	CVE-2023-46813
Description	An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3711-1, DSA-5594-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bookworm	6.1.176-1	fixed
	bookworm (security)	6.1.187-1	fixed
	trixie	6.12.94-1	fixed
	trixie (security)	6.12.107-1	fixed
	forky	7.1.12-1	fixed
	sid	7.1.13-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
linux	source	buster	(not affected)
linux	source	bullseye	5.10.205-2	DSA-5594-1
linux	source	bookworm	6.1.64-1
linux	source	(unstable)	6.5.10-1
linux-5.10	source	buster	5.10.205-2~deb10u1	DLA-3711-1

Notes

[buster] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/63e44bc52047f182601e7817da969a105aa1f721 (6.6-rc7)
https://git.kernel.org/linus/b9cb9c45583b911e0db71d09caa6b56469eb2bdf (6.6-rc7)
https://git.kernel.org/linus/a37cd2a59d0cb270b1bba568fd3a3b8668b9d3ba (6.6-rc7)