K000138731: Linux vulnerability CVE-2023-3776

Security Advisory Description A use-after-free vulnerability in the Linux kernel's net/sched: clsfw component can be exploited to achieve local privilege escalation. If tcfchangeindev fails, fwsetparms will immediately return an error after incrementing or decrementing the reference counter in...

Design/Logic Flaw

In the Linux kernel, the following vulnerability has been resolved: net/sched: schfrag: fix stack OOB read while fragmenting IPv4 packets when 'actmirred' tries to fragment IPv4 packets that had been previously re-assembled using 'actct', splats like the following can be observed on kernels built...

CVE-2021-46954

CVE-2021-46954 affects the Linux kernel net/sched IPv4 path. When act_mirred attempts to fragment IPv4 packets that were previously reassembled by act_ct, sch_frag used a temporary dst_entry, which was later treated as an rtable pointer in the fragment/MTU flow. This caused a stack out-of-bounds ...

CVE-2021-46954 net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets

In the Linux kernel, the following vulnerability has been resolved: net/sched: schfrag: fix stack OOB read while fragmenting IPv4 packets when 'actmirred' tries to fragment IPv4 packets that had been previously re-assembled using 'actct', splats like the following can be observed on kernels built...

CVE-2021-46954

In the Linux kernel, the following vulnerability has been resolved: net/sched: schfrag: fix stack OOB read while fragmenting IPv4 packets when 'actmirred' tries to fragment IPv4 packets that had been previously re-assembled using 'actct', splats like the following can be observed on kernels built...

SUSE SLES15 Security Update : kernel RT (Live Patch 3 for SLE 15 SP5) (SUSE-SU-2024:0622-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:0622-1 advisory. This update for the Linux Kernel 5.14.21-1505001311 fixes several issues. The following security issues were fixed: - CVE-2023-4921: Fixed a...

SUSE SLES15 Security Update : kernel RT (Live Patch 5 for SLE 15 SP5) (SUSE-SU-2024:0624-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:0624-1 advisory. This update for the Linux Kernel 5.14.21-1505001318 fixes several issues. The following security issues were fixed: - CVE-2023-4921: Fixed a...

K000138693: Linux kernel vulnerabilities CVE-2023-4206, CVE-2023-4207, and CVE-2023-4208

Security Advisory Description CVE-2023-4206 A use-after-free vulnerability in the Linux kernel's net/sched: clsroute component can be exploited to achieve local privilege escalation. When route4change is called on an existing filter, the whole tcfresult struct is always copied into the new instan...

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

A use-after-free flaw was found in u32change in net/sched/clsu32.c in the network subcomponent of the Linux kernel. This flaw allows a local attacker to crash the system, cause a privilege escalation, and leak kernel information...

RHEL 8 : kernel-rt (RHSA-2024:0881)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:0881 advisory. The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirement...

SUSE SLES15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2024:0474-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:0474-1 advisory. The SUSE Linux Enterprise 15 SP3 LTSS kernel was updated to receive various security bugfixes. The following security bugs were...

PT-2024-21494

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The issue is related to the net/sched: act mirred component in the Linux kernel. When redirecting the skb and tcf mirred forward has not been called, the core needs to be told to drop th...

kernel: use-after-free in sch_qfq network scheduler

A use-after-free flaw was found in qfqdequeue and aggdequeue in net/sched/schqfq.c in the Traffic Control QoS subsystem in the Linux kernel. This issue may allow a local user to crash the system or escalate their privileges on the system...

kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg function happens qfq_enqueue overhead

An out-of-bounds memory write flaw was found in qfqchangeagg in net/sched/schqfq.c in the Traffic Control QoS subsystem in the Linux kernel. This flaw allows a local user to crash or potentially escalate their privileges on the system...

Important: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 8.8 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...

Important: Red Hat Security Advisory: kpatch-patch security update

An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, i...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from th...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

kernel: net/sched: sch_hfsc UAF

A use-after-free flaw was found in the Linux kernel's net/sched: schhfsc HFSC qdisc traffic control component that can be exploited to achieve local privilege escalation. If a class with a link-sharing curve, for example, with the HFSCFSC flag set, has a parent without a link-sharing curve, then...

Important: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for...