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kernel: posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()

🗓️ 11 Sep 2025 06:33:39Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

A race between timer handling and deletion causes use-after-free on exiting tasks, enabling local privilege escalation.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
GithubExploit		Exploit for Time-of-check Time-of-use (TOCTOU) Race Condition in Linux Linux_Kernel
19 Jan 202601:22
–githubexploit
GithubExploit		Exploit for Time-of-check Time-of-use (TOCTOU) Race Condition in Linux Linux_Kernel
3 Jan 202616:52
–githubexploit
GithubExploit		lpe-toolkit
21 May 202619:33
–githubexploit
GithubExploit		Exploit for Time-of-check Time-of-use (TOCTOU) Race Condition in Linux Linux_Kernel
2 Jun 202615:13
–githubexploit
GithubExploit		Exploit for Time-of-check Time-of-use (TOCTOU) Race Condition in Linux Linux_Kernel
24 Feb 202605:25
–githubexploit
GithubExploit		Exploit for Time-of-check Time-of-use (TOCTOU) Race Condition in Linux Linux_Kernel
30 May 202602:37
–githubexploit
GithubExploit		Exploit for Time-of-check Time-of-use (TOCTOU) Race Condition in Linux Linux_Kernel
8 Jan 202614:14
–githubexploit
IBM Security Bulletins		Security Bulletin: IBM TXSeries for Multiplatforms is affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability & a use-after-free (UAF) vulnerability found in Linux kernel packages.
9 Oct 202511:38
–ibm
IBM Security Bulletins		Security Bulletin: IBM CICS TX Standard is affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability & a use-after-free (UAF) vulnerability found in Linux kernel packages.
14 Oct 202509:15
–ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in IBM Cloud Pak System
3 Jul 202623:06
–ibm
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.2aarch64bpftool0:7.0.0-284.137.1.el9_2bpftool-0:7.0.0-284.137.1.el9_2.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lebpftool0:7.0.0-284.137.1.el9_2bpftool-0:7.0.0-284.137.1.el9_2.ppc64le.rpm
Red Hat Enterprise Linux9.2s390xbpftool0:7.0.0-284.137.1.el9_2bpftool-0:7.0.0-284.137.1.el9_2.s390x.rpm
Red Hat Enterprise Linux9.2x86_64bpftool0:7.0.0-284.137.1.el9_2bpftool-0:7.0.0-284.137.1.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2aarch64bpftool-debuginfo0:7.0.0-284.137.1.el9_2bpftool-debuginfo-0:7.0.0-284.137.1.el9_2.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lebpftool-debuginfo0:7.0.0-284.137.1.el9_2bpftool-debuginfo-0:7.0.0-284.137.1.el9_2.ppc64le.rpm
Red Hat Enterprise Linux9.2s390xbpftool-debuginfo0:7.0.0-284.137.1.el9_2bpftool-debuginfo-0:7.0.0-284.137.1.el9_2.s390x.rpm
Red Hat Enterprise Linux9.2x86_64bpftool-debuginfo0:7.0.0-284.137.1.el9_2bpftool-debuginfo-0:7.0.0-284.137.1.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2aarch64kernel0:5.14.0-284.137.1.el9_2kernel-0:5.14.0-284.137.1.el9_2.aarch64.rpm
Red Hat Enterprise Linux9.2ppc64lekernel0:5.14.0-284.137.1.el9_2kernel-0:5.14.0-284.137.1.el9_2.ppc64le.rpm
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30 Jun 2026 03:31Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.4
EPSS0.01345
SSVC
CWE-362
timer raceuse after freelocal privilege escalationexiting taskkernel vulnerabilitytimer deletionrace condition
3