CVE-2024-38667: riscv: prevent pt_regs corruption for secondary idle threads
First published: Mon Jun 24 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: riscv: prevent pt_regs corruption for secondary idle threads Top of the kernel thread stack should be reserved for pt_regs. However this is not the case for the idle threads of the secondary boot harts. Their stacks overlap with their pt_regs, so both may get corrupted. Similar issue has been fixed for the primary hart, see c7cdd96eca28 ("riscv: prevent stack corruption by reserving task_pt_regs(p) early"). However that fix was not propagated to the secondary harts. The problem has been noticed in some CPU hotplug tests with V enabled. The function smp_callin stored several registers on stack, corrupting top of pt_regs structure including status field. As a result, kernel attempted to save or restore inexistent V context.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.7 | |
| Linux Linux kernel | >=6.1<6.1.93 | |
| Linux Linux kernel | >=6.6<6.6.33 | |
| Linux Linux kernel | >=6.9<6.9.4 | |
| Linux Linux kernel | =6.10.0-rc1 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80
- https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44
- https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af
- https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e
- https://launchpad.net/bugs/cve/CVE-2024-38667
- https://git.kernel.org/linus/a638b0461b58aa3205cd9d5f14d6f703d795b4af
- https://security-tracker.debian.org/tracker/CVE-2024-38667
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-38667
- https://nvd.nist.gov/vuln/detail/CVE-2024-38667
- https://ubuntu.com/security/CVE-2024-38667
- agent/title
- agent/type
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/severity
- agent/weakness
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/remedy
- agent/first-publish-date
- agent/references
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/trending
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/6.1
- version/linux linux kernel/6.6
- version/linux linux kernel/6.9
- version/linux linux kernel/6.10.0-rc1
- package-manager/debian