kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush()

A flaw was found in the Linux kernel's block input/output control group blk-cgroup component. This vulnerability, a Use-After-Free UAF, occurs when multiple block control groups are released at the same time. A race condition allows one group to remove another's entries while it is still in use,...

Important: Red Hat Security Advisory: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabilit...

SUSE-SU-2026:24107-1 Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.26.1 fixes various security issues: The following security issues were fixed: - CVE-2026-46116: xfrm: defensively unhash xfrmstate lists in xfrmstatedelete bsc1267370. - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc127228...

SUSE-SU-2026:24070-1 Security update for the Linux Kernel RT (Live Patch 14 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-38.1 fixes various security issues: The following security issues were fixed: - CVE-2026-46116: xfrm: defensively unhash xfrmstate lists in xfrmstatedelete bsc1267370. - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. -...

SUSE-SU-2026:24063-1 Security update for the Linux Kernel RT (Live Patch 23 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-46.1 fixes various security issues: The following security issues were fixed: - CVE-2026-46116: xfrm: defensively unhash xfrmstate lists in xfrmstatedelete bsc1267370. - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. -...

SUSE-SU-2026:24059-1 Security update for the Linux Kernel RT (Live Patch 27 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-50.2 fixes various security issues: The following security issues were fixed: - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. - CVE-2026-63888: scsi: target: iscsi: Fix CRC overread and double-free in iscsithandletextcmd...

SUSE-SU-2026:24066-1 Security update for the Linux Kernel RT (Live Patch 20 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-42.1 fixes various security issues: The following security issues were fixed: - CVE-2026-46116: xfrm: defensively unhash xfrmstate lists in xfrmstatedelete bsc1267370. - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. -...

Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise 15 SP7)

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.66 fixes various security issues: The following security issues were fixed: CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. CVE-2026-63888: scsi: target: iscsi: Fix CRC overread and double-free in...

SUSE-SU-2026:4537-1 Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise 15 SP7)

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.66 fixes various security issues: The following security issues were fixed: - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. - CVE-2026-63888: scsi: target: iscsi: Fix CRC overread and double-free in...

SUSE-SU-2026:24076-1 Security update for the Linux Kernel (Live Patch 26 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-49.1 fixes various security issues: The following security issues were fixed: - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. - CVE-2026-63888: scsi: target: iscsi: Fix CRC overread and double-free in iscsithandletextcmd...

SUSE-SU-2026:24075-1 Security update for the Linux Kernel (Live Patch 27 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-50.2 fixes various security issues: The following security issues were fixed: - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. - CVE-2026-63888: scsi: target: iscsi: Fix CRC overread and double-free in iscsithandletextcmd...

SUSE-SU-2026:24025-1 Security update for the Linux Kernel (Live Patch 25 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-48.1 fixes various security issues: The following security issues were fixed: - CVE-2026-46116: xfrm: defensively unhash xfrmstate lists in xfrmstatedelete bsc1267370. - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. -...

SUSE-SU-2026:24032-1 Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise Micro 6.0)

This update for the SUSE Linux Enterprise Kernel 6.4.0-41.1 fixes various security issues: The following security issues were fixed: - CVE-2026-46116: xfrm: defensively unhash xfrmstate lists in xfrmstatedelete bsc1267370. - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. -...

SUSE-SU-2026:24102-1 Security update for the Linux Kernel (Live Patch 1 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.6.1 fixes various security issues: The following security issues were fixed: - CVE-2026-46116: xfrm: defensively unhash xfrmstate lists in xfrmstatedelete bsc1267370. - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283...

SUSE-SU-2026:4513-1 Security update for the Linux Kernel (Live Patch 19 for SUSE Linux Enterprise 15 SP7)

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.73 fixes various security issues: The following security issues were fixed: - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. - CVE-2026-63888: scsi: target: iscsi: Fix CRC overread and double-free in...

SUSE-SU-2026:24010-1 Security update for the Linux Kernel (Live Patch 15 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.36.1 fixes various security issues: The following security issues were fixed: - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. - CVE-2026-63888: scsi: target: iscsi: Fix CRC overread and double-free in...

SUSE-SU-2026:24016-1 Security update for the Linux Kernel (Live Patch 15 for SUSE Linux Enterprise 16)

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.36.1 fixes various security issues: The following security issues were fixed: - CVE-2026-63802: blk-cgroup: fix UAF in blkcgrstatflush bsc1272283. - CVE-2026-63888: scsi: target: iscsi: Fix CRC overread and double-free in...

CentOS Linux 8.5 [TuxCare] Security Update: bpftool / kernel / kernel-core / kernel-cross-headers / etc Multiple Vulnerabilities (CENTOS8.5:CLSA-2026:1783414155)

The CentOS Linux 8.5 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS8.5:CLSA-2026:1783414155 advisory. - In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix UAF by grabbing blkcg lock before destroying...

CVE-2026-93795

A flaw was found in the Linux kernel's block control group blk-cgroup subsystem, which can lead to a Denial of Service DoS. When an insertion failure occurs during the creation of a block group structure, the error-handling path fails to properly shut down reference counting. A local user can...

SUSE CVE-2026-93795

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix leaks and online flag on radixtreeinsert failure When radixtreeinsert fails in blkgcreate, the error path has two issues: 1. blkg-online is set to true unconditionally, even when the blkg was never fully inserted...