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kernel: rtmutex: Use waiter::task instead of current in remove_waiter()

🗓️ 17 Jul 2026 13:11:34Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 7 Views

Linux kernel real time mutex use-after-free in remove_waiter during futex requeue; current use instead of waiter task.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7ppc64bpftool3.10.0-1160.156.1.el7bpftool-3.10.0-1160.156.1.el7.ppc64.rpm
Red Hat Enterprise Linux7ppc64lebpftool3.10.0-1160.156.1.el7bpftool-3.10.0-1160.156.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7s390xbpftool3.10.0-1160.156.1.el7bpftool-3.10.0-1160.156.1.el7.s390x.rpm
Red Hat Enterprise Linux7x86_64bpftool3.10.0-1160.156.1.el7bpftool-3.10.0-1160.156.1.el7.x86_64.rpm
Red Hat Enterprise Linux7ppc64bpftool-debuginfo3.10.0-1160.156.1.el7bpftool-debuginfo-3.10.0-1160.156.1.el7.ppc64.rpm
Red Hat Enterprise Linux7ppc64lebpftool-debuginfo3.10.0-1160.156.1.el7bpftool-debuginfo-3.10.0-1160.156.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7s390xbpftool-debuginfo3.10.0-1160.156.1.el7bpftool-debuginfo-3.10.0-1160.156.1.el7.s390x.rpm
Red Hat Enterprise Linux7x86_64bpftool-debuginfo3.10.0-1160.156.1.el7bpftool-debuginfo-3.10.0-1160.156.1.el7.x86_64.rpm
Red Hat Enterprise Linux7ppc64kernel3.10.0-1160.156.1.el7kernel-3.10.0-1160.156.1.el7.ppc64.rpm
Red Hat Enterprise Linux7ppc64lekernel3.10.0-1160.156.1.el7kernel-3.10.0-1160.156.1.el7.ppc64le.rpm
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21 Jul 2026 20:59Current
6.7Medium risk
Vulners AI Score6.7
CVSS 3.17.8
EPSS0.00125
CWE-825
real time mutexuse after freefutex requeueremove waiter bugprivilege escalation
7