Use-after-free in Linux kernel - CVE-2022-49995

Vulnerability identifier: #VU111449

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-49995

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the wb_inode_writeback_start() and wb_inode_writeback_end() functions in mm/page-writeback.c, within the wb_wakeup_delayed() and cgwb_remove_from_bdi_list() functions in mm/backing-dev.c, within the inode_io_list_move_locked(), wb_queue_work() and get_next_work_item() functions in fs/fs-writeback.c. A local user can escalate privileges on the system.

Linux kernel
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Live Patching
openSUSE Leap
kernel-livepatch-5_14_21-150400_24_170-default
kernel-livepatch-5_14_21-150400_24_170-default-debuginfo
kernel-livepatch-SLE15-SP4_Update_42-debugsource
kernel-livepatch-5_14_21-150500_55_113-default-debuginfo
kernel-livepatch-SLE15-SP5_Update_28-debugsource
kernel-livepatch-5_14_21-150500_55_113-default
kernel-rt (Red Hat package)
dtb-hisilicon
dtb-renesas
dtb-qcom
dtb-aarch64
dtb-socionext
dtb-freescale
dtb-xilinx
dtb-lg
dtb-mediatek
dtb-altera
dtb-amd
dtb-exynos
dtb-apple
dtb-arm
dtb-nvidia
dtb-rockchip
dtb-marvell
dtb-broadcom
dtb-cavium
dtb-apm
dtb-sprd
dtb-amlogic
kernel-macros
dtb-amazon
dtb-allwinner
kernel-docs
kernel-source
kernel-devel
kernel-syms
kernel-obs-qa
kernel-source-vanilla
kernel-docs-html
reiserfs-kmp-64kb-debuginfo
ocfs2-kmp-64kb-debuginfo
kernel-default-livepatch
kernel-default-debugsource
kernel-default-debuginfo
kernel-default
kernel-64kb-debugsource
kernel-64kb
cluster-md-kmp-64kb
ocfs2-kmp-64kb
kernel-64kb-optional-debuginfo
kernel-64kb-devel
kernel-64kb-optional
kselftests-kmp-64kb-debuginfo
kernel-64kb-debuginfo
gfs2-kmp-64kb-debuginfo
reiserfs-kmp-64kb
cluster-md-kmp-64kb-debuginfo
kernel-default-livepatch-devel
kernel-64kb-devel-debuginfo
kernel-64kb-extra
kselftests-kmp-default
reiserfs-kmp-default
kernel-default-devel
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-obs-build-debugsource
kernel-default-extra
kselftests-kmp-64kb
kernel-default-extra-debuginfo
gfs2-kmp-default
cluster-md-kmp-default
ocfs2-kmp-default
kernel-kvmsmall-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debugsource
kernel-obs-build
dlm-kmp-64kb-debuginfo
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump
dlm-kmp-64kb
gfs2-kmp-64kb
kernel-64kb-extra-debuginfo
kernel-kvmsmall
kernel-default-devel-debuginfo
dlm-kmp-default-debuginfo
reiserfs-kmp-default-debuginfo
dlm-kmp-default
kselftests-kmp-default-debuginfo
kernel-default-optional
kernel-default-optional-debuginfo
gfs2-kmp-default-debuginfo
kernel-default-base-rebuild
kernel-default-base

Install update from vendor's repository.

Linux kernel - update to 5.15.64
kernel-livepatch-5_14_21-150400_24_170-default - update to 1-150400.9.3.2
kernel-livepatch-5_14_21-150400_24_170-default-debuginfo - update to 1-150400.9.3.2
kernel-livepatch-SLE15-SP4_Update_42-debugsource - update to 1-150400.9.3.2
kernel-livepatch-5_14_21-150500_55_113-default-debuginfo - update to 1-150500.11.3.1
kernel-livepatch-SLE15-SP5_Update_28-debugsource - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_113-default - update to 1-150500.11.3.1
kernel-rt (Red Hat package) - update to 5.14.0-70.140.1.rt21.212.el9_0
dtb-hisilicon - update to 5.14.21-150400.24.170.1
dtb-renesas - update to 5.14.21-150400.24.170.1
dtb-qcom - update to 5.14.21-150400.24.170.1
dtb-aarch64 - update to 5.14.21-150400.24.170.1
dtb-socionext - update to 5.14.21-150400.24.170.1
dtb-freescale - update to 5.14.21-150400.24.170.1
dtb-xilinx - update to 5.14.21-150400.24.170.1
dtb-lg - update to 5.14.21-150400.24.170.1
dtb-mediatek - update to 5.14.21-150400.24.170.1
dtb-altera - update to 5.14.21-150400.24.170.1
dtb-amd - update to 5.14.21-150400.24.170.1
dtb-exynos - update to 5.14.21-150400.24.170.1
dtb-apple - update to 5.14.21-150400.24.170.1
dtb-arm - update to 5.14.21-150400.24.170.1
dtb-nvidia - update to 5.14.21-150400.24.170.1
dtb-rockchip - update to 5.14.21-150400.24.170.1
dtb-marvell - update to 5.14.21-150400.24.170.1
dtb-broadcom - update to 5.14.21-150400.24.170.1
dtb-cavium - update to 5.14.21-150400.24.170.1
dtb-apm - update to 5.14.21-150400.24.170.1
dtb-sprd - update to 5.14.21-150400.24.170.1
dtb-amlogic - update to 5.14.21-150400.24.170.1
kernel-macros - update to 5.14.21-150400.24.170.1
dtb-amazon - update to 5.14.21-150400.24.170.1
dtb-allwinner - update to 5.14.21-150400.24.170.1
kernel-docs - update to 5.14.21-150400.24.170.1
kernel-source - update to 5.14.21-150400.24.170.1
kernel-devel - update to 5.14.21-150400.24.170.1
kernel-syms - update to 5.14.21-150400.24.170.1
kernel-obs-qa - update to 5.14.21-150400.24.170.1
kernel-source-vanilla - update to 5.14.21-150400.24.170.1
kernel-docs-html - update to 5.14.21-150400.24.170.1
reiserfs-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
ocfs2-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kernel-default-livepatch - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-default-debugsource - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-default-debuginfo - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-default - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-64kb-debugsource - update to 5.14.21-150400.24.170.2
kernel-64kb - update to 5.14.21-150400.24.170.2
cluster-md-kmp-64kb - update to 5.14.21-150400.24.170.2
ocfs2-kmp-64kb - update to 5.14.21-150400.24.170.2
kernel-64kb-optional-debuginfo - update to 5.14.21-150400.24.170.2
kernel-64kb-devel - update to 5.14.21-150400.24.170.2
kernel-64kb-optional - update to 5.14.21-150400.24.170.2
kselftests-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kernel-64kb-debuginfo - update to 5.14.21-150400.24.170.2
gfs2-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
reiserfs-kmp-64kb - update to 5.14.21-150400.24.170.2
cluster-md-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kernel-default-livepatch-devel - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-64kb-devel-debuginfo - update to 5.14.21-150400.24.170.2
kernel-64kb-extra - update to 5.14.21-150400.24.170.2
kselftests-kmp-default - update to 5.14.21-150400.24.170.2
reiserfs-kmp-default - update to 5.14.21-150400.24.170.2
kernel-default-devel - update to 5.14.21-150400.24.170.2
cluster-md-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
ocfs2-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
kernel-obs-build-debugsource - update to 5.14.21-150400.24.170.2
kernel-default-extra - update to 5.14.21-150400.24.170.2
kselftests-kmp-64kb - update to 5.14.21-150400.24.170.2
kernel-default-extra-debuginfo - update to 5.14.21-150400.24.170.2
gfs2-kmp-default - update to 5.14.21-150400.24.170.2
cluster-md-kmp-default - update to 5.14.21-150400.24.170.2
ocfs2-kmp-default - update to 5.14.21-150400.24.170.2
kernel-kvmsmall-devel - update to 5.14.21-150400.24.170.2
kernel-kvmsmall-debuginfo - update to 5.14.21-150400.24.170.2
kernel-kvmsmall-devel-debuginfo - update to 5.14.21-150400.24.170.2
kernel-kvmsmall-debugsource - update to 5.14.21-150400.24.170.2
kernel-obs-build - update to 5.14.21-150400.24.170.2
dlm-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kernel-zfcpdump-debuginfo - update to 5.14.21-150400.24.170.2
kernel-zfcpdump-debugsource - update to 5.14.21-150400.24.170.2
kernel-zfcpdump - update to 5.14.21-150400.24.170.2
dlm-kmp-64kb - update to 5.14.21-150400.24.170.2
gfs2-kmp-64kb - update to 5.14.21-150400.24.170.2
kernel-64kb-extra-debuginfo - update to 5.14.21-150400.24.170.2
kernel-kvmsmall - update to 5.14.21-150400.24.170.2
kernel-default-devel-debuginfo - update to 5.14.21-150400.24.170.2
dlm-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
reiserfs-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
dlm-kmp-default - update to 5.14.21-150400.24.170.2
kselftests-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
kernel-default-optional - update to 5.14.21-150400.24.170.2
kernel-default-optional-debuginfo - update to 5.14.21-150400.24.170.2
gfs2-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
kernel-default-base-rebuild - update to 5.14.21-150400.24.170.2.150400.24.86.2
kernel-default-base - update to 5.14.21-150400.24.170.2.150400.24.86.2

• https://git.kernel.org/stable/c/9a6c710f3bc10bc9cc23e1c080b53245b7f9d5b7
• https://git.kernel.org/stable/c/f87904c075515f3e1d8f4a7115869d3b914674fd
• https://git.kernel.org/stable/c/f96b9f7c1676923bce871e728bb49c0dfa5013cc
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.64

• Use-after-free in Linux kernel fs
• SUSE update for the Linux Kernel
• Red Hat Enterprise Linux 9 update for kernel-rt
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel