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kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping

🗓️ 14 Jan 2020 15:56:29Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 1 Views

Kernel coredump race allows information leakage or denial of service by racing mmget_not_zero or get_task_mm with virtual memory area layout or flag changes.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7.4ppc64lekernel0:3.10.0-693.62.1.el7kernel-0:3.10.0-693.62.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64kernel0:3.10.0-693.62.1.el7kernel-0:3.10.0-693.62.1.el7.x86_64.rpm
Red Hat Enterprise Linux7.4anykernel-abi-whitelists0:3.10.0-693.62.1.el7.noarchkernel-abi-whitelists-0:3.10.0-693.62.1.el7.noarch.noarch.rpm
Red Hat Enterprise Linux7.4ppc64lekernel-bootwrapper0:3.10.0-693.62.1.el7kernel-bootwrapper-0:3.10.0-693.62.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7.4ppc64lekernel-debug0:3.10.0-693.62.1.el7kernel-debug-0:3.10.0-693.62.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64kernel-debug0:3.10.0-693.62.1.el7kernel-debug-0:3.10.0-693.62.1.el7.x86_64.rpm
Red Hat Enterprise Linux7.4ppc64lekernel-debug-debuginfo0:3.10.0-693.62.1.el7kernel-debug-debuginfo-0:3.10.0-693.62.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64kernel-debug-debuginfo0:3.10.0-693.62.1.el7kernel-debug-debuginfo-0:3.10.0-693.62.1.el7.x86_64.rpm
Red Hat Enterprise Linux7.4ppc64lekernel-debug-devel0:3.10.0-693.62.1.el7kernel-debug-devel-0:3.10.0-693.62.1.el7.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64kernel-debug-devel0:3.10.0-693.62.1.el7kernel-debug-devel-0:3.10.0-693.62.1.el7.x86_64.rpm
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30 Jun 2026 11:36Current
7.2High risk
Vulners AI Score7.2
CVSS 26.9
CVSS 3.17
EPSS0.00989
CWE-820
kernel vulnerabilitycoredump racememory managementvirtual memory areasrace conditioninformation leakagedenial of service
1