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

🗓️ 10 Sep 2025 18:25:22Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

Kernel race between timer handling and deletion on exiting tasks causes use-after-free and privilege escalation risk.

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 Linux8.2x86_64bpftool0:4.18.0-193.168.1.el8_2bpftool-0:4.18.0-193.168.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64bpftool-debuginfo0:4.18.0-193.168.1.el8_2bpftool-debuginfo-0:4.18.0-193.168.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel0:4.18.0-193.168.1.el8_2kernel-0:4.18.0-193.168.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2anykernel-abi-whitelists0:4.18.0-193.168.1.el8_2.noarchkernel-abi-whitelists-0:4.18.0-193.168.1.el8_2.noarch.noarch.rpm
Red Hat Enterprise Linux8.2x86_64kernel-core0:4.18.0-193.168.1.el8_2kernel-core-0:4.18.0-193.168.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug0:4.18.0-193.168.1.el8_2kernel-debug-0:4.18.0-193.168.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-core0:4.18.0-193.168.1.el8_2kernel-debug-core-0:4.18.0-193.168.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-debuginfo0:4.18.0-193.168.1.el8_2kernel-debug-debuginfo-0:4.18.0-193.168.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-devel0:4.18.0-193.168.1.el8_2kernel-debug-devel-0:4.18.0-193.168.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-modules0:4.18.0-193.168.1.el8_2kernel-debug-modules-0:4.18.0-193.168.1.el8_2.x86_64.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
kerneltimer handlingtimer deletionexiting tasksuse after freeprivilege escalationlocal user
5