CVE-2025-38352
Linux Kernel Time-of-Check Time-of-Use (TOCTOU) Race Condition Vulnerability
- 대응 우선순위
- 최우선
- CVSS
- 7.4
- EPSS
- 1.34% 백분위 68.2% · 2026.07.17 기준
- CISA KEV
- 등록
- 조치 기한
- 2025.09.25
- 공개일
- 2025.07.22
CISA KEV에 등록된 실제 악용 확인 취약점
In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del() If an exiting non-autoreaping task has already passed exit_notify() and calls handle_posix_cpu_timers() from IRQ, it can be reaped by its parent or debugger right after unlock_task_sighand(). If a concurrent posix_cpu_timer_del() runs at that moment, it won't be able to detect timer->it.cpu.firing != 0: cpu_timer_task_rcu() and/or lock_task_sighand() will fail. Add the tsk->exit_state check into run_posix_cpu_timers() to fix this. This fi...
제품 Linux Kernel
영향 버전 Linux Kernel 0bdd2ed4138ec04e09b4f8165981efc99e439f55, 2.6.36, >= 2.6.36 < 5.4.295, >= 5.5 < 5.10.239, >= 5.11 < 5.15.186, >= 5.16 < 6.1.142, >= 6.2 < 6.6.94, >= 6.7 < 6.12.34, >= 6.13 < 6.15.3, 6.16, 11.0
수정 버전 Linux Kernel 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3
영향 여부, 우선 대응, 정식 해결과 결과 확인 절차를 요약합니다.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
조치 기한: 2025.09.25Linux Kernel의 현재 전체 버전이 공식 영향 범위(Linux Kernel 0bdd2ed4138ec04e09b4f8165981efc99e439f55, 2.6.36, >= 2.6.36 < 5.4.295, >= 5.5 < 5.10.239, >= 5.11 < 5.15.186, >= 5.16 < 6.1.142, >= 6.2 < 6.6.94, >= 6.7 < 6.12.34, >= 6.13 < 6.15.3, 6.16, 11.0)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
패치 후 같은 명령으로 전체 버전을 다시 확인해 Linux Kernel 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3 기준을 충족하는지 확인합니다. 이어서 경쟁 조건·TOCTOU 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
CVSS 벡터 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-367
KEV 등록일 2025.09.04
랜섬웨어 캠페인 사용 미확인
CISA 비고 This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=2c72fe18cc5f9f1750f5bc148cf1c94c29e106ff ; https://source.android.com/docs/security/bulletin/2025-09-01 ; https://nvd.nist.gov/vuln/detail/CVE-2025-38352
EPSS 데이터 기준일 2026.07.17