Bug 2422719 (CVE-2025-40358) - CVE-2025-40358 kernel: riscv: stacktrace: Disable KASAN checks for non-current tasks
Summary: CVE-2025-40358 kernel: riscv: stacktrace: Disable KASAN checks for non-curren...
Keywords:
Status: NEW
Alias: CVE-2025-40358
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-16 14:06 UTC by OSIDB Bzimport
Modified: 2026-06-29 20:28 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-12-16 14:06:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

riscv: stacktrace: Disable KASAN checks for non-current tasks

Unwinding the stack of a task other than current, KASAN would report
"BUG: KASAN: out-of-bounds in walk_stackframe+0x41c/0x460"

There is a same issue on x86 and has been resolved by the commit
84936118bdf3 ("x86/unwind: Disable KASAN checks for non-current tasks")
The solution could be applied to RISC-V too.

This patch also can solve the issue:
https://seclists.org/oss-sec/2025/q4/23

[pjw: clean up checkpatch issues]
Comment 1 Alexander B 2025-12-17 00:49:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121643-CVE-2025-40358-9963@gregkh/T
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