| Summary: |
VUL-0: CVE-2024-38667: kernel: riscv: prevent pt_regs corruption for secondary idle threads |
| Product: |
[Novell Products] SUSE Security Incidents
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Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Kernel Bugs <kernel-bugs> |
| Status: |
RESOLVED
INVALID
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QA Contact: |
Security Team bot <security-team> |
| Severity: |
Normal
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| Priority: |
P5 - None
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CC: |
camila.matos
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| Version: |
unspecified | |
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| Target Milestone: |
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| Hardware: |
Other | |
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| OS: |
Other | |
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| URL: |
https://smash.suse.de/issue/411972/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2024-38667:6.4:(AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H) |
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Found By:
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Security Response Team
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Services Priority:
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Business Priority:
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Blocker:
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Marketing QA Status:
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IT Deployment:
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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. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-38667 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-38667.mbox https://git.kernel.org/stable/c/ea22d4195cca13d5fdbc4d6555a2dfb8a7867a9e https://git.kernel.org/stable/c/3090c06d50eaa91317f84bf3eac4c265e6cb8d44 https://git.kernel.org/stable/c/0c1f28c32a194303da630fca89481334b9547b80 https://git.kernel.org/stable/c/a638b0461b58aa3205cd9d5f14d6f703d795b4af https://www.cve.org/CVERecord?id=CVE-2024-38667