# CVE-2025-39974: linux: In the Linux kernel, the following vulnerability has been resolved:  tracing/osnoise: Fix slab-out-of-bounds in _pars...

CVE-2025-39974 is fixed in linux on 1 platform by DEBIAN-CVE-2025-39974 (version 6.16.10-1), released October 15, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-39974
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 15, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  tracing/osnoise: Fix slab-out-of-bounds in _parse_integer_limit()  When config osnoise cpus by write() syscall, the following KASAN splat may be observed:  BUG: KASAN: slab-out-of-bounds in _parse_integer_limit+0x103/0x130 Read of size 1 at addr ffff88810121e3a1 by task test/447 CPU: 1 UID: 0 PID: 447 Comm: test Not tainted 6.17.0-rc6-dirty #288 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Call Trace:  <TASK>  dump_stack_lvl+0x55/0x70  print_report+0xcb/0x610  kasan_report+0xb8/0xf0  _parse_integer_limit+0x103/0x130  bitmap_parselist+0x16d/0x6f0  osnoise_cpus_write+0x116/0x2d0  vfs_write+0x21e/0xcc0  ksys_write+0xee/0x1c0  do_syscall_64+0xa8/0x2a0  entry_SYSCALL_64_after_hwframe+0x77/0x7f  </TASK>  This issue can be reproduced by below code:  const char *cpulist = "1"; int fd=open("/sys/kernel/debug/tracing/osnoise/cpus", O_WRONLY); write(fd, cpulist, strlen(cpulist));  Function bitmap_parselist() was called to parse cpulist, it require that the parameter 'buf' must be terminated with a '\0' or '\n'. Fix this issue by adding a '\0' to 'buf' in osnoise_cpus_write().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.16.10-1 | [DEBIAN-CVE-2025-39974](https://patchblox.com/security/data/fix/linux/debian-cve-2025-39974.md) | Oct 15, 2025 |

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