Threats Tagged 'ghsa-66mv-wq2c-77c3'
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Threats Tagged 'ghsa-66mv-wq2c-77c3'
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In the Linux kernel, the following vulnerability has been resolved: ptp: vmclock: prevent read-only mappings from becoming writable… (CVE-2026-80724)CVE-2026-80724 0 In the Linux kernel, the following vulnerability has been resolved: ptp: vmclock: prevent read-only mappings from becoming writable vmclock_miscdev_mmap() rejects writable mappings of the shared vmclock ABI page with -EROFS, but leaves VM_MAYWRITE set. Userspace can map the page read-only and then upgrade it to writable with mprotect(), after which the guest can corrupt the host-written timekeeping data (sequence counter, UTC time, TSC offset) that the vmclock ABI defines as read-only. Clear VM_MAYWRITE on the read-only path so the mapping cannot be upgraded, as i915 does for its read-only objects and as fixed in drm/vc4 (CVE-2026-68445) and drm/panthor (CVE-2024-53071). Join the discussion | GCVE Database | 08/28/2026, 09:31:50 UTC Added: 08/28/2026, 15:22:43 UTC |
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