UBUNTU-CVE-2023-46813
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.
02 / AFFECTED SOFTWARE
Affected packages
23 explicit affected versions
35 explicit affected versions
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
8 explicit affected versions
6 explicit affected versions
44 explicit affected versions
30 explicit affected versions
41 explicit affected versions
30 explicit affected versions
37 explicit affected versions
7 explicit affected versions
38 explicit affected versions
13 explicit affected versions
35 explicit affected versions
1 explicit affected versions
12 explicit affected versions
18 explicit affected versions
24 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
1 explicit affected versions
21 explicit affected versions
9 explicit affected versions
16 explicit affected versions
10 explicit affected versions
7 explicit affected versions
12 explicit affected versions
28 explicit affected versions
12 explicit affected versions
14 explicit affected versions
7 explicit affected versions
12 explicit affected versions
12 explicit affected versions
7 explicit affected versions
37 explicit affected versions
13 explicit affected versions
10 explicit affected versions
17 explicit affected versions
26 explicit affected versions
13 explicit affected versions
3 explicit affected versions
29 explicit affected versions
13 explicit affected versions
41 explicit affected versions
40 explicit affected versions
2 explicit affected versions
33 explicit affected versions
23 explicit affected versions
10 explicit affected versions
11 explicit affected versions
12 explicit affected versions
7 explicit affected versions
12 explicit affected versions
30 explicit affected versions
22 explicit affected versions
38 explicit affected versions
10 explicit affected versions
26 explicit affected versions
1 explicit affected versions
13 explicit affected versions
16 explicit affected versions
41 explicit affected versions
31 explicit affected versions
3 explicit affected versions
2 explicit affected versions
51 explicit affected versions
12 explicit affected versions
27 explicit affected versions
20 explicit affected versions
14 explicit affected versions
8 explicit affected versions
2 explicit affected versions
5 explicit affected versions
8 explicit affected versions
10 explicit affected versions
2 explicit affected versions
13 explicit affected versions
7 explicit affected versions
33 explicit affected versions
10 explicit affected versions
10 explicit affected versions
12 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
27 explicit affected versions
37 explicit affected versions
14 explicit affected versions
38 explicit affected versions
31 explicit affected versions
9 explicit affected versions
31 explicit affected versions
11 explicit affected versions
38 explicit affected versions
8 explicit affected versions
7 explicit affected versions
12 explicit affected versions
4 explicit affected versions
1 explicit affected versions
1 explicit affected versions
36 explicit affected versions
2 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
14 explicit affected versions
4 explicit affected versions
3 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.9
- https://git.kernel.org/linus/63e44bc52047f182601e7817da969a105aa1f721
- https://git.kernel.org/linus/a37cd2a59d0cb270b1bba568fd3a3b8668b9d3ba
- https://git.kernel.org/linus/b9cb9c45583b911e0db71d09caa6b56469eb2bdf
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=63e44bc52047f182601e7817da969a105aa1f721
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a37cd2a59d0cb270b1bba568fd3a3b8668b9d3ba
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9cb9c45583b911e0db71d09caa6b56469eb2bdf
- https://ubuntu.com/security/CVE-2023-46813
- https://ubuntu.com/security/notices/USN-6533-1
- https://ubuntu.com/security/notices/USN-6624-1
- https://ubuntu.com/security/notices/USN-6626-1
- https://ubuntu.com/security/notices/USN-6626-2
- https://ubuntu.com/security/notices/USN-6626-3
- https://ubuntu.com/security/notices/USN-6628-1
- https://ubuntu.com/security/notices/USN-6628-2
- https://ubuntu.com/security/notices/USN-6652-1
- https://www.cve.org/CVERecord?id=CVE-2023-46813