Bugzilla – Bug 1222803
VUL-0: CVE-2024-26810: kernel: vfio/pci: Lock external INTx masking ops
Last modified: 2024-04-19 12:45:45 UTC
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. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26810 https://www.cve.org/CVERecord?id=CVE-2024-26810 https://git.kernel.org/stable/c/03505e3344b0576fd619416793a31eae9c5b73bf https://git.kernel.org/stable/c/04a4a017b9ffd7b0f427b8c376688d14cb614651 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/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26810.mbox https://bugzilla.redhat.com/show_bug.cgi?id=2273654 https://git.kernel.org/stable/c/ec73e079729258a05452356cf6d098bf1504d5a6 https://git.kernel.org/stable/c/1e71b6449d55179170efc8dee8664510bb813b42 https://git.kernel.org/stable/c/3dd9be6cb55e0f47544e7cdda486413f7134e3b3
@Takashi: Can you please check? ./scripts/check-kernel-fix CVE-2024-26810 810cd4bb5345 ("vfio/pci: Lock external INTx masking ops") merged v6.9-rc1~90^2~5 Fixes: 89e1f7d4c66d ("vfio: Add PCI device driver") merged v3.6-rc1~25^2 Security fix for CVE-2024-26810 bsc#1222803 with CVSS 4.4 .............................. ACTION NEEDED! SLE15-SP6: MANUAL: backport 810cd4bb53456d0503cc4e7934e063835152c1b7 (Fixes 89e1f7d4c66d) SLE15-SP5: MANUAL: backport 810cd4bb53456d0503cc4e7934e063835152c1b7 (Fixes 89e1f7d4c66d) SLE12-SP5: MANUAL: backport 810cd4bb53456d0503cc4e7934e063835152c1b7 (Fixes 89e1f7d4c66d) SLE12-SP3-TD: MANUAL: backport 810cd4bb53456d0503cc4e7934e063835152c1b7 (Fixes 89e1f7d4c66d)
I suppose it's rather for Virtualization team. I can backport it if it's urgent, though.