CVE-2024-50192
Published: November 12, 2024Last modified: November 12, 2024
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.7 |
| Attack Vector | LOCAL |
| Attack complexity | HIGH |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.114-r0) |
| Stream | linux-lts | Fixed (6.6.58-r0) |
References
- https://git.kernel.org/stable/c/01282ab5182f85e42234df2ff42f0ce790f465ff
- https://git.kernel.org/stable/c/1442ee0011983f0c5c4b92380e6853afb513841a
- https://git.kernel.org/stable/c/64b12b061c5488e2d69e67c4eaae5da64fd30bfe
- https://git.kernel.org/stable/c/755b9532c885b8761fb135fedcd705e21e61cccb
- https://git.kernel.org/stable/c/b7d7b7fc876f836f40bf48a87e07ea18756ba196
- https://git.kernel.org/stable/c/d960505a869e66184fff97fb334980a5b797c7c6