CVE-2025-39974 (GCVE-0-2025-39974)

Vulnerability from cvelistv5 – Published: 2025-10-15 07:55 – Updated: 2025-10-15 07:55
VLAI?
Title
tracing/osnoise: Fix slab-out-of-bounds in _parse_integer_limit()
Summary
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().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 17f89102fe23d7389085a8820550df688f79888a , < 930cb05a9e107777316b3ccf37f9556366669065 (git)
Affected: 17f89102fe23d7389085a8820550df688f79888a , < a2501032de0d1bc7971b2e43c03da534ac10ee9b (git)
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    Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.16.10 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/trace_osnoise.c"
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          "vendor": "Linux",
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              "versionType": "git"
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                  "versionStartIncluding": "6.16",
                  "vulnerable": true
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/osnoise: Fix slab-out-of-bounds in _parse_integer_limit()\n\nWhen config osnoise cpus by write() syscall, the following KASAN splat may\nbe observed:\n\nBUG: KASAN: slab-out-of-bounds in _parse_integer_limit+0x103/0x130\nRead of size 1 at addr ffff88810121e3a1 by task test/447\nCPU: 1 UID: 0 PID: 447 Comm: test Not tainted 6.17.0-rc6-dirty #288 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x55/0x70\n print_report+0xcb/0x610\n kasan_report+0xb8/0xf0\n _parse_integer_limit+0x103/0x130\n bitmap_parselist+0x16d/0x6f0\n osnoise_cpus_write+0x116/0x2d0\n vfs_write+0x21e/0xcc0\n ksys_write+0xee/0x1c0\n do_syscall_64+0xa8/0x2a0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n \u003c/TASK\u003e\n\nThis issue can be reproduced by below code:\n\nconst char *cpulist = \"1\";\nint fd=open(\"/sys/kernel/debug/tracing/osnoise/cpus\", O_WRONLY);\nwrite(fd, cpulist, strlen(cpulist));\n\nFunction bitmap_parselist() was called to parse cpulist, it require that\nthe parameter \u0027buf\u0027 must be terminated with a \u0027\\0\u0027 or \u0027\\n\u0027. Fix this issue\nby adding a \u0027\\0\u0027 to \u0027buf\u0027 in osnoise_cpus_write()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-15T07:55:56.275Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/930cb05a9e107777316b3ccf37f9556366669065"
        },
        {
          "url": "https://git.kernel.org/stable/c/a2501032de0d1bc7971b2e43c03da534ac10ee9b"
        }
      ],
      "title": "tracing/osnoise: Fix slab-out-of-bounds in _parse_integer_limit()",
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        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39974",
    "datePublished": "2025-10-15T07:55:56.275Z",
    "dateReserved": "2025-04-16T07:20:57.150Z",
    "dateUpdated": "2025-10-15T07:55:56.275Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39974\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-15T08:15:35.153\",\"lastModified\":\"2025-10-16T15:29:11.563\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntracing/osnoise: Fix slab-out-of-bounds in _parse_integer_limit()\\n\\nWhen config osnoise cpus by write() syscall, the following KASAN splat may\\nbe observed:\\n\\nBUG: KASAN: slab-out-of-bounds in _parse_integer_limit+0x103/0x130\\nRead of size 1 at addr ffff88810121e3a1 by task test/447\\nCPU: 1 UID: 0 PID: 447 Comm: test Not tainted 6.17.0-rc6-dirty #288 PREEMPT(voluntary)\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0x55/0x70\\n print_report+0xcb/0x610\\n kasan_report+0xb8/0xf0\\n _parse_integer_limit+0x103/0x130\\n bitmap_parselist+0x16d/0x6f0\\n osnoise_cpus_write+0x116/0x2d0\\n vfs_write+0x21e/0xcc0\\n ksys_write+0xee/0x1c0\\n do_syscall_64+0xa8/0x2a0\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n \u003c/TASK\u003e\\n\\nThis issue can be reproduced by below code:\\n\\nconst char *cpulist = \\\"1\\\";\\nint fd=open(\\\"/sys/kernel/debug/tracing/osnoise/cpus\\\", O_WRONLY);\\nwrite(fd, cpulist, strlen(cpulist));\\n\\nFunction bitmap_parselist() was called to parse cpulist, it require that\\nthe parameter \u0027buf\u0027 must be terminated with a \u0027\\\\0\u0027 or \u0027\\\\n\u0027. Fix this issue\\nby adding a \u0027\\\\0\u0027 to \u0027buf\u0027 in osnoise_cpus_write().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/930cb05a9e107777316b3ccf37f9556366669065\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a2501032de0d1bc7971b2e43c03da534ac10ee9b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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