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kernel: af_alg_release() in crypto/af_alg.c neglects to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattr

🗓️ 21 Jan 2020 15:53:02Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 8 Views

af_alg_release misses NULLing a member, causing use-after-free in sockfs_setattr and local privilege escalation.

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Tenable Nessus		CentOS 7 : kernel-alt (RHSA-2020:0174)
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Tenable Nessus		EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1538)
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Tenable Nessus		Fedora 28 : kernel / kernel-headers / kernel-tools (2019-16de0047d4)
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Tenable Nessus		Fedora 29 : kernel / kernel-headers / kernel-tools (2019-7bdeed7fc5)
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Tenable Nessus		openSUSE Security Update : the Linux Kernel (openSUSE-2019-1193)
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Tenable Nessus		Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2019-4612)
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Tenable Nessus		Palo Alto Networks PAN-OS 7.1.x < 7.1.24 / 8.0.x < 8.0.18 / 8.1.x < 8.1.9 / 9.0.x < 9.0.3 Vulnerability
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7ppc64lekernel0:4.14.0-115.17.1.el7akernel-0:4.14.0-115.17.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux7anykernel-abi-whitelists0:4.14.0-115.17.1.el7a.noarchkernel-abi-whitelists-0:4.14.0-115.17.1.el7a.noarch.noarch.rpm
Red Hat Enterprise Linux7ppc64lekernel-bootwrapper0:4.14.0-115.17.1.el7akernel-bootwrapper-0:4.14.0-115.17.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux7ppc64lekernel-debug0:4.14.0-115.17.1.el7akernel-debug-0:4.14.0-115.17.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux7ppc64lekernel-debug-debuginfo0:4.14.0-115.17.1.el7akernel-debug-debuginfo-0:4.14.0-115.17.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux7ppc64lekernel-debug-devel0:4.14.0-115.17.1.el7akernel-debug-devel-0:4.14.0-115.17.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux7ppc64lekernel-debuginfo0:4.14.0-115.17.1.el7akernel-debuginfo-0:4.14.0-115.17.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux7ppc64lekernel-debuginfo-common-ppc64le0:4.14.0-115.17.1.el7akernel-debuginfo-common-ppc64le-0:4.14.0-115.17.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux7ppc64lekernel-devel0:4.14.0-115.17.1.el7akernel-devel-0:4.14.0-115.17.1.el7a.ppc64le.rpm
Red Hat Enterprise Linux7anykernel-doc0:4.14.0-115.17.1.el7a.noarchkernel-doc-0:4.14.0-115.17.1.el7a.noarch.noarch.rpm
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28 Jun 2026 12:10Current
7High risk
Vulners AI Score7
CVSS 27.2
CVSS 3.17.8
EPSS0.00651
CWE-416
kernelaf algorithm releaseuse after freesockfs setattrlocal privilege escalation
8