In the Linux kernel, the following vulnerability has been resolved:
dma-buf/dma-resv: check if the new fence is really later
Previously when we added a fence to a dma_resv object we always assumed the the newer than all the existing fences.
With Jason's work to add an UAPI to explicit export/import that's not necessary the case any more. So without this check we would allow userspace to force the kernel into an use after free error.
Since the change is very small and defensive it's probably a good idea to backport this to stable kernels as well just in case others are using the dma_resv object in the same way.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade python-perfUpgrade python-perf-debuginfoUpgrade perfUpgrade kernel-livepatch-5.10.237-230.949Upgrade kernel-headersUpgrade bpftool-debuginfoUpgrade kernel-livepatch-4.14.355-277.647Upgrade kernel-livepatch-5.10.240-238.966Upgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.15.189-131.211Upgrade kernel-livepatch-5.10.237-230.948Upgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.10.238-234.956Upgrade kernel-toolsUpgrade kernel-tools-develUpgrade kernel-livepatch-5.10.240-238.955Upgrade bpftoolUpgrade kernel-livepatch-4.14.355-280.652Upgrade kernel-livepatch-4.14.355-280.672Upgrade kernel-livepatch-4.14.355-280.664Upgrade kernel-livepatch-4.14.355-280.651Upgrade kernel-livepatch-5.10.239-236.958Upgrade kernel-livepatch-5.10.238-231.953Upgrade kernel | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Jun 20, 2025 | Jun 20, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 18, 2025 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Jun 18, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Feb 9, 2026 | Jun 18, 2025 |
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