Description
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Prevent unmapping active read buffers The kms paths keep a persistent map active to read and compare the cursor buffer. These maps can race with each other in simple scenario where: a) buffer "a" mapped for update b) buffer "a" mapped for compare c) do the compare d) unmap "a" for compare e) update the cursor f) unmap "a" for update At step "e" the buffer has been unmapped and the read contents is bogus. Prevent unmapping of active read buffers by simply keeping a count of how many paths have currently active maps and unmap only when the count reaches 0.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
485d98d472d53f9617ffdfba5e677ac29ad4fe20 to < 58a3714db4d9dcaeb9fc4905141e17b9f536c0a5affected485d98d472d53f9617ffdfba5e677ac29ad4fe20 to < 0851b1ec650adadcaa23ec96daad95a55bf966f0affected485d98d472d53f9617ffdfba5e677ac29ad4fe20 to < d5228d158e4c0b1663b3983044913c15c3d0135eaffected485d98d472d53f9617ffdfba5e677ac29ad4fe20 to < aba07b9a0587f50e5d3346eaa19019cf3f86c0eaaffected
Linux Linux
Default version status: affected
5.19affected0 to < 5.19unaffected6.1.113 to ≤ 6.1.*unaffected6.6.54 to ≤ 6.6.*unaffected6.10.8 to ≤ 6.10.*unaffected6.11 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/58a3714db4d9dcaeb9fc4905141e17b9f536c0a5 ↗
- https://git.kernel.org/stable/c/0851b1ec650adadcaa23ec96daad95a55bf966f0 ↗
- https://git.kernel.org/stable/c/d5228d158e4c0b1663b3983044913c15c3d0135e ↗
- https://git.kernel.org/stable/c/aba07b9a0587f50e5d3346eaa19019cf3f86c0ea ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗