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kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c

🗓️ 21 Feb 2024 00:33:59Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

Use-after-free in kernel net sched u32 due to refcount error; local attacker can crash, escalate privileges, and leak kernel info.

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Tenable Nessus		Amazon Linux 2022 : bpftool, kernel, kernel-devel (ALAS2022-2022-083)
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Tenable Nessus		Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2023-070)
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Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2-2022-1798 (ALAS-2022-1798)
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Tenable Nessus		Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-014)
10 Jun 202200:00
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Tenable Nessus		Amazon Linux 2 : kernel (ALASKERNEL-5.15-2022-001)
10 Jun 202200:00
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Tenable Nessus		Amazon Linux 2 : kernel (ALASKERNEL-5.15-2023-023)
6 Sep 202300:00
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Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2022-026 (ALASKERNEL-5.4-2022-026)
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.6aarch64bpftool4.18.0-372.93.1.el8_6bpftool-4.18.0-372.93.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lebpftool4.18.0-372.93.1.el8_6bpftool-4.18.0-372.93.1.el8_6.ppc64le.rpm
Red Hat Enterprise Linux8.6s390xbpftool4.18.0-372.93.1.el8_6bpftool-4.18.0-372.93.1.el8_6.s390x.rpm
Red Hat Enterprise Linux8.6x86_64bpftool4.18.0-372.93.1.el8_6bpftool-4.18.0-372.93.1.el8_6.x86_64.rpm
Red Hat Enterprise Linux8.6aarch64bpftool-debuginfo4.18.0-372.93.1.el8_6bpftool-debuginfo-4.18.0-372.93.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lebpftool-debuginfo4.18.0-372.93.1.el8_6bpftool-debuginfo-4.18.0-372.93.1.el8_6.ppc64le.rpm
Red Hat Enterprise Linux8.6s390xbpftool-debuginfo4.18.0-372.93.1.el8_6bpftool-debuginfo-4.18.0-372.93.1.el8_6.s390x.rpm
Red Hat Enterprise Linux8.6x86_64bpftool-debuginfo4.18.0-372.93.1.el8_6bpftool-debuginfo-4.18.0-372.93.1.el8_6.x86_64.rpm
Red Hat Enterprise Linux8.6aarch64kernel4.18.0-372.93.1.el8_6kernel-4.18.0-372.93.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lekernel4.18.0-372.93.1.el8_6kernel-4.18.0-372.93.1.el8_6.ppc64le.rpm
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03 Jul 2026 02:31Current
6.6Medium risk
Vulners AI Score6.6
CVSS 27.2
CVSS 3.17.8
EPSS0.01039
CWE-416
kerneluse after freenet sched u32reference count errorlocal attackerprivilege escalationkernel information leak
4