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kernel: uninitialized registers on stack in nft_do_chain can cause kernel pointer leakage to UM

🗓️ 18 Jul 2023 08:31:22Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

Kernel flaw in netfilter nft_do_chain can leak kernel pointers to user memory via use after free, enabling local information leak.

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nessus		Amazon Linux 2022 : bpftool, kernel, kernel-devel (ALAS2022-2022-042)
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nessus		Amazon Linux 2 : kernel, --advisory ALAS2-2022-1768 (ALAS-2022-1768)
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.0x86_64kernel-rt0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-core0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-core-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-debug-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-core0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-debug-core-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-debuginfo0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-debug-debuginfo-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-devel0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-debug-devel-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-kvm0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-debug-kvm-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-modules0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-debug-modules-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-modules-extra0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-debug-modules-extra-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debuginfo0:5.14.0-70.64.1.rt21.135.el9_0kernel-rt-debuginfo-0:5.14.0-70.64.1.rt21.135.el9_0.x86_64.rpm
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28 Jun 2026 12:40Current
6.6Medium risk
Vulners AI Score6.6
CVSS 3.15.5
EPSS0.00416
CWE-909
netfilternft_do_chainuse after freekernel pointer leakinformation leaklocal attackerunprivileged
5