# CVE-2023-53694: linux: In the Linux kernel, the following vulnerability has been resolved:  riscv: ftrace: Fixup panic by disabling preempti...

CVE-2023-53694 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53694, released October 22, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-53694
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 22, 2025

## 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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.25-1 | [DEBIAN-CVE-2023-53694](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53694.md) | Oct 22, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.25-1 | [DEBIAN-CVE-2023-53694](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53694.md) | Oct 22, 2025 |
| Linux | linux Debian 14 | 6.1.25-1 | [DEBIAN-CVE-2023-53694](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53694.md) | Oct 22, 2025 |

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