Bugzilla – Bug 1222810
VUL-0: CVE-2024-26814: kernel: vfio/fsl-mc: Block calling interrupt handler without trigger
Last modified: 2024-07-08 14:34:35 UTC
In the Linux kernel, the following vulnerability has been resolved: vfio/fsl-mc: Block calling interrupt handler without trigger The eventfd_ctx trigger pointer of the vfio_fsl_mc_irq object is initially NULL and may become NULL if the user sets the trigger eventfd to -1. The interrupt handler itself is guaranteed that trigger is always valid between request_irq() and free_irq(), but the loopback testing mechanisms to invoke the handler function need to test the trigger. The triggering and setting ioctl paths both make use of igate and are therefore mutually exclusive. The vfio-fsl-mc driver does not make use of irqfds, nor does it support any sort of masking operations, therefore unlike vfio-pci and vfio-platform, the flow can remain essentially unchanged. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26814 https://www.cve.org/CVERecord?id=CVE-2024-26814 https://git.kernel.org/stable/c/083e750c9f5f4c3bf61161330fb84d7c8e8bb417 https://git.kernel.org/stable/c/6ec0d88166dac43f29e96801c0927d514f17add9 https://git.kernel.org/stable/c/7447d911af699a15f8d050dfcb7c680a86f87012 https://git.kernel.org/stable/c/de87511fb0404d23b6da5f4660383b6ed095e28d https://git.kernel.org/stable/c/ee0bd4ad780dfbb60355b99f25063357ab488267 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26814.mbox https://bugzilla.redhat.com/show_bug.cgi?id=2273646 https://git.kernel.org/stable/c/250219c6a556f8c69c5910fca05a59037e24147d https://git.kernel.org/stable/c/a563fc18583ca4f42e2fdd0c70c7c618288e7ede
@Takashi: Can you please check ./scripts/check-kernel-fix CVE-2024-26814 7447d911af69 ("vfio/fsl-mc: Block calling interrupt handler without trigger") merged v6.9-rc1~90^2 Fixes: cc0ee20bd969 ("vfio/fsl-mc: trigger an interrupt via eventfd") merged v5.10-rc1~53^2~5^2~2 Security fix for CVE-2024-26814 bsc#1222810 with CVSS 4.4 .............................. ACTION NEEDED! SLE15-SP6: MANUAL: backport 7447d911af699a15f8d050dfcb7c680a86f87012 (Fixes cc0ee20bd969) SLE15-SP5: MANUAL: backport 7447d911af699a15f8d050dfcb7c680a86f87012 (Fixes cc0ee20bd969
I suppose it's rather for Virtualization team. I can backport it if it's urgent, though.