In the Linux kernel, the following vulnerability has been resolved:

riscv: ftrace: Fixup panic by disabling preemption

In RISCV, we must use an AUIPC + JALR pair to encode an immediate,
forming a jump that jumps to an address over 4K. This may cause errors
if we want to enable kernel preemption and remove dependency from
patching code with stop_machine(). For example, if a task was switched
out on auipc. And, if we changed the ftrace function before it was
switched back, then it would jump to an address that has updated 11:0
bits mixing with previous XLEN:12 part.

p: patched area performed by dynamic ftrace
ftrace_prologue:
p| REG_S ra, -SZREG(sp)
p| auipc ra, 0x? ------------> preempted
...
change ftrace function
...
p| jalr -?(ra) <------------- switched back
p| REG_L ra, -SZREG(sp)
func:
xxx
ret

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00032.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
afc76b8b80112189b6f11e67e19cf58301944814 affected < 84cfcf240f4a577733b1d98fcd2611a611612b03
afc76b8b80112189b6f11e67e19cf58301944814 affected < 20a7510e781084364691b4962de31de758194cc9
afc76b8b80112189b6f11e67e19cf58301944814 affected < 8547649981e6631328cd64f583667501ae385531
Linux Linux affected
Version Status Constraints
5.12 affected —
0 unaffected < 5.12
6.1.23 unaffected ≤ 6.1.*
6.2.3 unaffected ≤ 6.2.*
6.3 unaffected ≤ *

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/20a7510e781084364691b4962de31de758194cc9 cve-icon cve-icon
https://git.kernel.org/stable/c/84cfcf240f4a577733b1d98fcd2611a611612b03 cve-icon cve-icon
https://git.kernel.org/stable/c/8547649981e6631328cd64f583667501ae385531 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025102210-CVE-2023-53694-ed6b@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53694 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53694 cve-icon
History

Thu, 23 Oct 2025 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Thu, 23 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 22 Oct 2025 13:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: riscv: ftrace: Fixup panic by disabling preemption In RISCV, we must use an AUIPC + JALR pair to encode an immediate, forming a jump that jumps to an address over 4K. This may cause errors if we want to enable kernel preemption and remove dependency from patching code with stop_machine(). For example, if a task was switched out on auipc. And, if we changed the ftrace function before it was switched back, then it would jump to an address that has updated 11:0 bits mixing with previous XLEN:12 part. p: patched area performed by dynamic ftrace ftrace_prologue: p| REG_S ra, -SZREG(sp) p| auipc ra, 0x? ------------> preempted ... change ftrace function ... p| jalr -?(ra) <------------- switched back p| REG_L ra, -SZREG(sp) func: xxx ret
Title riscv: ftrace: Fixup panic by disabling preemption
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-10-22T13:23:35.869Z

Reserved: 2025-10-22T13:21:37.344Z

Link: CVE-2023-53694

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-22T14:15:43.887

Modified: 2025-10-22T21:12:48.953

Link: CVE-2023-53694

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-22T00:00:00Z

Links: CVE-2023-53694 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-23T10:07:33Z

Weaknesses

No weakness.