CVE-2023-46813: Race Condition
First published: Fri Oct 27 2023(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.5.9 | |
| IBM QRadar SIEM | <=7.5 - 7.5.0 UP8 IF01 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://bugzilla.suse.com/show_bug.cgi?id=1212649
- 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=b9cb9c45583b911e0db71d09caa6b56469eb2bdf
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a37cd2a59d0cb270b1bba568fd3a3b8668b9d3ba
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.9
- https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
- https://launchpad.net/bugs/cve/CVE-2023-46813
- 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)
- 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-6628-1
- https://ubuntu.com/security/notices/USN-6626-2
- https://ubuntu.com/security/notices/USN-6628-2
- https://ubuntu.com/security/notices/USN-6626-3
- https://ubuntu.com/security/notices/USN-6652-1
- https://www.cve.org/CVERecord?id=CVE-2023-46813
- https://nvd.nist.gov/vuln/detail/CVE-2023-46813
- https://security-tracker.debian.org/tracker/CVE-2023-46813
- https://git.kernel.org/linus/597cfe48212a3f110ab0f918bf59791f453e65b7
- https://git.kernel.org/linus/63e44bc52047f182601e7817da969a105aa1f721
- https://git.kernel.org/linus/25189d08e5168c098c307a0eaae5b30c13a331ef
- https://git.kernel.org/linus/b9cb9c45583b911e0db71d09caa6b56469eb2bdf
- https://git.kernel.org/linus/0118b604c2c94c6e34982015cfa7891af4764786
- https://git.kernel.org/linus/a37cd2a59d0cb270b1bba568fd3a3b8668b9d3ba
- https://ubuntu.com/security/CVE-2023-46813
- https://access.redhat.com/errata/RHSA-2024:0431
- https://access.redhat.com/errata/RHSA-2024:0432
- https://access.redhat.com/errata/RHSA-2024:0461
- https://access.redhat.com/errata/RHSA-2024:0439
- https://access.redhat.com/errata/RHSA-2024:0448
- https://access.redhat.com/errata/RHSA-2024:0575
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2261969
- https://access.redhat.com/errata/RHSA-2024:0724
- https://access.redhat.com/errata/RHSA-2024:0881
- https://access.redhat.com/errata/RHSA-2024:0897
- https://bugzilla.redhat.com/show_bug.cgi?id=2246944
- https://exchange.xforce.ibmcloud.com/vulnerabilities/269812
- https://www.ibm.com/support/pages/node/7150684 (Advisory)
Frequently Asked Questions
What is the CVE ID for this vulnerability?
The CVE ID for this vulnerability is CVE-2023-46813.
What is the severity of CVE-2023-46813?
The severity of CVE-2023-46813 is high with a severity value of 7.
How does CVE-2023-46813 affect Linux kernel?
CVE-2023-46813 affects Linux kernel versions before 6.5.9.
What is the vulnerability description for CVE-2023-46813?
CVE-2023-46813 is a vulnerability in the Linux kernel that allows local users with userspace access to MMIO registers to gain arbitrary write access to kernel memory.
How can I fix CVE-2023-46813?
To fix CVE-2023-46813, update your Linux kernel to version 6.5.9 or later.
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