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 | |
| ubuntu/linux | <5.15.0-94.104 | 5.15.0-94.104 |
| ubuntu/linux | <6.5.0-17.17 | 6.5.0-17.17 |
| ubuntu/linux | <6.6~ | 6.6~ |
| ubuntu/linux-aws | <5.15.0-1053.58 | 5.15.0-1053.58 |
| ubuntu/linux-aws | <6.5.0-1013.13 | 6.5.0-1013.13 |
| ubuntu/linux-aws | <6.6~ | 6.6~ |
| ubuntu/linux-aws-5.15 | <5.15.0-1053.58~20.04.1 | 5.15.0-1053.58~20.04.1 |
| ubuntu/linux-aws-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-aws-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-aws-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-aws-hwe | <6.6~ | 6.6~ |
| ubuntu/linux-azure | <5.15.0-1056.64 | 5.15.0-1056.64 |
| ubuntu/linux-azure | <6.5.0-1015.15 | 6.5.0-1015.15 |
| ubuntu/linux-azure | <6.6~ | 6.6~ |
| ubuntu/linux-azure-4.15 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-5.15 | <5.15.0-1056.64~20.04.1 | 5.15.0-1056.64~20.04.1 |
| ubuntu/linux-azure-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-fde | <5.15.0-1056.64.1 | 5.15.0-1056.64.1 |
| ubuntu/linux-azure-fde | <6.6~ | 6.6~ |
| ubuntu/linux-azure-fde-5.15 | <5.15.0-1056.64~20.04.1.1 | 5.15.0-1056.64~20.04.1.1 |
| ubuntu/linux-azure-fde-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-azure-fde-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-bluefield | <6.6~ | 6.6~ |
| ubuntu/linux-fips | <6.6~ | 6.6~ |
| ubuntu/linux-gcp | <5.15.0-1051.59 | 5.15.0-1051.59 |
| ubuntu/linux-gcp | <6.5.0-1013.13 | 6.5.0-1013.13 |
| ubuntu/linux-gcp | <6.6~ | 6.6~ |
| ubuntu/linux-gcp-4.15 | <6.6~ | 6.6~ |
| ubuntu/linux-gcp-5.15 | <5.15.0-1051.59~20.04.1 | 5.15.0-1051.59~20.04.1 |
| ubuntu/linux-gcp-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-gcp-5.19 | <6.6~ | 6.6~ |
| ubuntu/linux-gcp-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-gke | <5.15.0-1050.55 | 5.15.0-1050.55 |
| ubuntu/linux-gke | <6.6~ | 6.6~ |
| ubuntu/linux-gkeop | <5.15.0-1036.42 | 5.15.0-1036.42 |
| ubuntu/linux-gkeop | <6.6~ | 6.6~ |
| ubuntu/linux-gkeop-5.15 | <5.15.0-1036.42~20.04.1 | 5.15.0-1036.42~20.04.1 |
| ubuntu/linux-gkeop-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-hwe | <6.6~ | 6.6~ |
| ubuntu/linux-hwe-5.15 | <5.15.0-94.104~20.04.1 | 5.15.0-94.104~20.04.1 |
| ubuntu/linux-hwe-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-hwe-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-hwe-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-hwe-6.5 | <6.5.0-17.17~22.04.1 | 6.5.0-17.17~22.04.1 |
| ubuntu/linux-ibm | <5.15.0-1046.49 | 5.15.0-1046.49 |
| ubuntu/linux-ibm | <6.6~ | 6.6~ |
| ubuntu/linux-ibm-5.15 | <5.15.0-1046.49~20.04.1 | 5.15.0-1046.49~20.04.1 |
| ubuntu/linux-ibm-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-ibm-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-intel-iotg | <5.15.0-1047.53 | 5.15.0-1047.53 |
| ubuntu/linux-intel-iotg | <6.6~ | 6.6~ |
| ubuntu/linux-intel-iotg-5.15 | <5.15.0-1048.54~20.04.1 | 5.15.0-1048.54~20.04.1 |
| ubuntu/linux-intel-iotg-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-iot | <6.6~ | 6.6~ |
| ubuntu/linux-kvm | <5.15.0-1050.55 | 5.15.0-1050.55 |
| ubuntu/linux-kvm | <6.6~ | 6.6~ |
| ubuntu/linux-laptop | <6.5.0-1009.12 | 6.5.0-1009.12 |
| ubuntu/linux-laptop | <6.6~ | 6.6~ |
| ubuntu/linux-lowlatency | <5.15.0-94.104 | 5.15.0-94.104 |
| ubuntu/linux-lowlatency | <6.5.0-17.17.1 | 6.5.0-17.17.1 |
| ubuntu/linux-lowlatency | <6.6~ | 6.6~ |
| ubuntu/linux-lowlatency-hwe-5.15 | <5.15.0-94.104~20.04.1 | 5.15.0-94.104~20.04.1 |
| ubuntu/linux-lowlatency-hwe-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-lowlatency-hwe-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-lowlatency-hwe-6.5 | <6.5.0-17.17.1.1.1~22.04.1 | 6.5.0-17.17.1.1.1~22.04.1 |
| ubuntu/linux-lts-xenial | <6.6~ | 6.6~ |
| ubuntu/linux-nvidia | <5.15.0-1044.44 | 5.15.0-1044.44 |
| ubuntu/linux-nvidia | <6.6~ | 6.6~ |
| ubuntu/linux-nvidia-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-oem-6.1 | <6.1.0-1027.27 | 6.1.0-1027.27 |
| ubuntu/linux-oem-6.1 | <6.6~ | 6.6~ |
| ubuntu/linux-oem-6.5 | <6.5.0-1014.15 | 6.5.0-1014.15 |
| ubuntu/linux-oem-6.5 | <6.6~ | 6.6~ |
| ubuntu/linux-oracle | <5.15.0-1051.57 | 5.15.0-1051.57 |
| ubuntu/linux-oracle | <6.5.0-1015.15 | 6.5.0-1015.15 |
| ubuntu/linux-oracle | <6.6~ | 6.6~ |
| ubuntu/linux-oracle-5.15 | <5.15.0-1051.57~20.04.1 | 5.15.0-1051.57~20.04.1 |
| ubuntu/linux-oracle-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-oracle-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-raspi | <5.15.0-1046.49 | 5.15.0-1046.49 |
| ubuntu/linux-raspi | <6.5.0-1010.13 | 6.5.0-1010.13 |
| ubuntu/linux-raspi | <6.6~ | 6.6~ |
| ubuntu/linux-raspi-5.4 | <6.6~ | 6.6~ |
| ubuntu/linux-riscv | <6.5.0-17.17.1 | 6.5.0-17.17.1 |
| ubuntu/linux-riscv | <6.6~ | 6.6~ |
| ubuntu/linux-riscv-5.15 | <5.15.0-1049.53~20.04.2 | 5.15.0-1049.53~20.04.2 |
| ubuntu/linux-riscv-5.15 | <6.6~ | 6.6~ |
| ubuntu/linux-starfive | <6.5.0-1007.8 | 6.5.0-1007.8 |
| ubuntu/linux-starfive | <6.6~ | 6.6~ |
| ubuntu/linux-starfive-6.2 | <6.6~ | 6.6~ |
| ubuntu/linux-xilinx-zynqmp | <5.15.0-1027.31 | 5.15.0-1027.31 |
| ubuntu/linux-xilinx-zynqmp | <6.6~ | 6.6~ |
| debian/linux | 4.19.249-2 4.19.304-1 5.10.209-2 5.10.216-1 6.1.76-1 6.1.90-1 6.7.12-1 | |
| debian/linux-5.10 | 5.10.216-1~deb10u1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
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://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://git.kernel.org/linus/63e44bc52047f182601e7817da969a105aa1f721
- https://git.kernel.org/linus/b9cb9c45583b911e0db71d09caa6b56469eb2bdf
- https://git.kernel.org/linus/a37cd2a59d0cb270b1bba568fd3a3b8668b9d3ba
- https://security-tracker.debian.org/tracker/CVE-2023-46813
- https://exchange.xforce.ibmcloud.com/vulnerabilities/269812
- https://www.ibm.com/support/pages/node/7144861 (Advisory)
- 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://git.kernel.org/linus/597cfe48212a3f110ab0f918bf59791f453e65b7
- https://git.kernel.org/linus/25189d08e5168c098c307a0eaae5b30c13a331ef
- https://git.kernel.org/linus/0118b604c2c94c6e34982015cfa7891af4764786
- https://ubuntu.com/security/CVE-2023-46813
Parent vulnerabilities
(Appears in the following advisories)
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.
- collector/mitre-cve
- agent/type
- agent/remedy
- agent/first-publish-date
- agent/author
- agent/weakness
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- collector/nvd-cve
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2023-46813
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/ibm-support
- source/IBM
- agent/last-modified-date
- agent/references
- agent/severity
- agent/tags
- agent/description
- agent/event
- collector/usn-cve
- source/Ubuntu
- vendor/linux
- canonical/linux linux kernel
- package-manager/debian
- package-manager/ubuntu