CVE-2024-26810: vfio/pci: Lock external INTx masking ops
First published: Fri Apr 05 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Lock external INTx masking ops Mask operations through config space changes to DisINTx may race INTx configuration changes via ioctl. Create wrappers that add locking for paths outside of the core interrupt code. In particular, irq_type is updated holding igate, therefore testing is_intx() requires holding igate. For example clearing DisINTx from config space can otherwise race changes of the interrupt configuration. This aligns interfaces which may trigger the INTx eventfd into two camps, one side serialized by igate and the other only enabled while INTx is configured. A subsequent patch introduces synchronization for the latter flows.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.1.84 | 6.1.84 |
| redhat/kernel | <6.6.24 | 6.6.24 |
| redhat/kernel | <6.7.12 | 6.7.12 |
| redhat/kernel | <6.8.3 | 6.8.3 |
| redhat/kernel | <6.9 | 6.9 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- https://git.kernel.org/stable/c/03505e3344b0576fd619416793a31eae9c5b73bf
- https://git.kernel.org/stable/c/04a4a017b9ffd7b0f427b8c376688d14cb614651
- https://git.kernel.org/stable/c/1e71b6449d55179170efc8dee8664510bb813b42
- https://git.kernel.org/stable/c/3dd9be6cb55e0f47544e7cdda486413f7134e3b3
- https://git.kernel.org/stable/c/3fe0ac10bd117df847c93408a9d428a453cd60e5
- https://git.kernel.org/stable/c/6fe478d855b20ac1eb5da724afe16af5a2aaaa40
- https://git.kernel.org/stable/c/810cd4bb53456d0503cc4e7934e063835152c1b7
- https://git.kernel.org/stable/c/ec73e079729258a05452356cf6d098bf1504d5a6
- https://launchpad.net/bugs/cve/CVE-2024-26810
- https://access.redhat.com/security/cve/CVE-2024-26810
- https://lore.kernel.org/linux-cve-announce/2024040548-CVE-2024-26810-4371@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2273655
- https://access.redhat.com/errata/RHSA-2024:4823
- https://access.redhat.com/errata/RHSA-2024:4831
- https://access.redhat.com/errata/RHSA-2024:5065
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:5928
- https://access.redhat.com/errata/RHSA-2024:6206
- https://bugzilla.redhat.com/show_bug.cgi?id=2273654
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26810
- https://nvd.nist.gov/vuln/detail/CVE-2024-26810
- https://security-tracker.debian.org/tracker/CVE-2024-26810
- https://ubuntu.com/security/CVE-2024-26810
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://git.kernel.org/linus/810cd4bb53456d0503cc4e7934e063835152c1b7
Frequently Asked Questions
What is the severity of CVE-2024-26810?
CVE-2024-26810 is classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2024-26810?
To fix CVE-2024-26810, update the Linux kernel to one of the patched versions listed in the vulnerability report.
Which versions of the Linux kernel are affected by CVE-2024-26810?
CVE-2024-26810 affects several versions of the Linux kernel including those before 6.1.84, 6.6.24, 6.7.12, 6.8.3, and 6.9.
Is CVE-2024-26810 related to external INTx masking operations?
Yes, CVE-2024-26810 involves a race condition in the external INTx masking operations in the Linux kernel.
What platforms or distributions are impacted by CVE-2024-26810?
CVE-2024-26810 impacts Red Hat and Debian Linux distributions as indicated in the vulnerability report.
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