Description
In the Linux kernel, the following vulnerability has been resolved:
irqchip/gic-v4: Don't allow a VMOVP on a dying VPE
Kunkun Jiang reported that there is a small window of opportunity for userspace to force a change of affinity for a VPE while the VPE has already been unmapped, but the corresponding doorbell interrupt still visible in /proc/irq/.
Plug the race by checking the value of vmapp_count, which tracks whether the VPE is mapped ot not, and returning an error in this case.
This involves making vmapp_count common to both GICv4.1 and its v4.0 ancestor.
Metrics
CVSS 3.1 4.7/10
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 64edfaa9a2342a3ce34f8cb982c2c2df84db4de3, < b7d7b7fc876f836f40bf48a87e07ea18756ba196; >= 64edfaa9a2342a3ce34f8cb982c2c2df84db4de3, < 755b9532c885b8761fb135fedcd705e21e61cccb; >= 64edfaa9a2342a3ce34f8cb982c2c2df84db4de3, < 64b12b061c5488e2d69e67c4eaae5da64fd30bfe; >= 64edfaa9a2342a3ce34f8cb982c2c2df84db4de3, < 01282ab5182f85e42234df2ff42f0ce790f465ff; >= 64edfaa9a2342a3ce34f8cb982c2c2df84db4de3, < d960505a869e66184fff97fb334980a5b797c7c6; >= 64edfaa9a2342a3ce34f8cb982c2c2df84db4de3, < 1442ee0011983f0c5c4b92380e6853afb513841a |
| Linux | Linux | 5.6 |
References
- https://git.kernel.org/stable/c/01282ab5182f85e42234df2ff42f0ce790f465ffPatch
- https://git.kernel.org/stable/c/1442ee0011983f0c5c4b92380e6853afb513841aPatch
- https://git.kernel.org/stable/c/64b12b061c5488e2d69e67c4eaae5da64fd30bfePatch
- https://git.kernel.org/stable/c/755b9532c885b8761fb135fedcd705e21e61cccbPatch
- https://git.kernel.org/stable/c/b7d7b7fc876f836f40bf48a87e07ea18756ba196Patch
- https://git.kernel.org/stable/c/d960505a869e66184fff97fb334980a5b797c7c6Patch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Timeline
- Published
- Nov 8, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Modified