Use-after-free in Linux kernel - CVE-2021-47247

Vulnerability identifier: #VU90090

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-2021-47247

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 mlx5e_take_all_route_decap_flows() and mlx5e_encap_valid() functions in drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c, within the wait_for_completion() and mlx5e_take_all_encap_flows() functions in drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c, within the mlx5e_rep_neigh_update() and mlx5e_rep_update_flows() functions in drivers/net/ethernet/mellanox/mlx5/core/en/rep/neigh.c. A local user can escalate privileges on the system.

Linux kernel
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Enterprise Storage
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
openSUSE Leap
openEuler
kernel-livepatch-5_3_18-150200_24_197-default
kernel-livepatch-SLE15-SP2_Update_50-debugsource
kernel-livepatch-5_3_18-150200_24_197-default-debuginfo
kernel-livepatch-SLE15-SP3_Update_46-debugsource
kernel-livepatch-5_3_18-150300_59_167-default
kernel-livepatch-5_3_18-150300_59_167-default-debuginfo
kernel-livepatch-5_3_18-150300_59_167-preempt
kernel-livepatch-5_3_18-150300_59_167-preempt-debuginfo
gfs2-kmp-default-debuginfo
kernel-default-devel-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
ocfs2-kmp-default-debuginfo
ocfs2-kmp-default
cluster-md-kmp-default
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-default-debuginfo
kernel-default-debugsource
kernel-default
dlm-kmp-default-debuginfo
reiserfs-kmp-default-debuginfo
kernel-obs-build
kernel-preempt-devel-debuginfo
kernel-obs-build-debugsource
gfs2-kmp-default
reiserfs-kmp-default
kernel-docs
kernel-devel
kernel-source
kernel-preempt-debugsource
kernel-preempt-debuginfo
kernel-syms
kernel-macros
kernel-preempt
kernel-default-devel
kernel-preempt-devel
kernel-default-base
dlm-kmp-64kb-debuginfo
dtb-xilinx
kernel-preempt-livepatch-devel
dtb-hisilicon
dlm-kmp-64kb
kernel-64kb-livepatch-devel
dtb-altera
gfs2-kmp-64kb-debuginfo
dtb-cavium
kernel-64kb-debugsource
kselftests-kmp-64kb-debuginfo
reiserfs-kmp-64kb
dtb-nvidia
dtb-marvell
dtb-socionext
cluster-md-kmp-64kb-debuginfo
dtb-aarch64
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kselftests-kmp-preempt
kernel-preempt-optional
gfs2-kmp-preempt-debuginfo
dlm-kmp-preempt-debuginfo
cluster-md-kmp-64kb
kernel-64kb
kernel-64kb-debuginfo
kernel-64kb-extra-debuginfo
dtb-allwinner
dtb-amd
ocfs2-kmp-64kb
dtb-lg
dtb-al
dtb-arm
reiserfs-kmp-64kb-debuginfo
kernel-64kb-extra
kernel-64kb-devel-debuginfo
kernel-64kb-devel
dtb-zte
dtb-exynos
ocfs2-kmp-64kb-debuginfo
dtb-rockchip
dtb-broadcom
dtb-mediatek
kernel-64kb-optional-debuginfo
dtb-renesas
dtb-sprd
kselftests-kmp-64kb
dtb-freescale
dtb-qcom
gfs2-kmp-64kb
dtb-amlogic
dtb-apm
kernel-64kb-optional
kernel-debug-debuginfo
kselftests-kmp-default-debuginfo
kernel-default-extra-debuginfo
kselftests-kmp-default
kernel-obs-qa
kernel-debug-devel
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-devel
kernel-debug-debugsource
kernel-debug-livepatch-devel
kernel-debug-devel-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-debug
kernel-kvmsmall
kernel-source-vanilla
kernel-docs-html
ocfs2-kmp-preempt-debuginfo
kselftests-kmp-preempt-debuginfo
gfs2-kmp-preempt
ocfs2-kmp-preempt
kernel-preempt-optional-debuginfo
kernel-preempt-extra-debuginfo
cluster-md-kmp-preempt-debuginfo
dlm-kmp-preempt
reiserfs-kmp-preempt-debuginfo
reiserfs-kmp-preempt
kernel-preempt-extra
cluster-md-kmp-preempt
kernel-default-optional
kernel-default-optional-debuginfo
kernel-default-extra
kernel-default-base-rebuild
kernel-source-rt
kernel-rt-debuginfo
kernel-rt-debugsource
kernel-rt
kernel-tools-debuginfo
python3-perf-debuginfo
kernel-tools
perf-debuginfo
kernel-debugsource
kernel-tools-devel
kernel-headers
kernel
perf
python3-perf
kernel-debuginfo
EMC Cloud Tiering Appliance

Install update from vendor's website.

Linux kernel - addressed in versions 5.10.237, 5.12.13, 5.13
kernel-livepatch-5_3_18-150200_24_197-default - update to 1-150200.5.3.1
kernel-livepatch-SLE15-SP2_Update_50-debugsource - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150200_24_197-default-debuginfo - update to 1-150200.5.3.1
kernel-livepatch-SLE15-SP3_Update_46-debugsource - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_167-default - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_167-default-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_167-preempt - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_167-preempt-debuginfo - update to 1-150300.7.3.1
gfs2-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-devel-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
cluster-md-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
dlm-kmp-default - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
ocfs2-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
ocfs2-kmp-default - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
cluster-md-kmp-default - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-livepatch-devel - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-livepatch - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-debugsource - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
dlm-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
reiserfs-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-obs-build - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-obs-build-debugsource - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
gfs2-kmp-default - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
reiserfs-kmp-default - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-docs - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-devel - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-source - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt-debugsource - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-syms - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-macros - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-devel - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt-devel - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-base - addressed in versions 5.3.18-150200.24.197.1.150200.9.101.1, 5.3.18-150300.59.167.1.150300.18.98.1
dlm-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
dtb-xilinx - update to 5.3.18-150300.59.167.1
kernel-preempt-livepatch-devel - update to 5.3.18-150300.59.167.1
dtb-hisilicon - update to 5.3.18-150300.59.167.1
dlm-kmp-64kb - update to 5.3.18-150300.59.167.1
kernel-64kb-livepatch-devel - update to 5.3.18-150300.59.167.1
dtb-altera - update to 5.3.18-150300.59.167.1
gfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
dtb-cavium - update to 5.3.18-150300.59.167.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.167.1
kselftests-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
reiserfs-kmp-64kb - update to 5.3.18-150300.59.167.1
dtb-nvidia - update to 5.3.18-150300.59.167.1
dtb-marvell - update to 5.3.18-150300.59.167.1
dtb-socionext - update to 5.3.18-150300.59.167.1
cluster-md-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
dtb-aarch64 - update to 5.3.18-150300.59.167.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.167.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.167.1
kernel-zfcpdump - update to 5.3.18-150300.59.167.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.167.1
kernel-preempt-optional - update to 5.3.18-150300.59.167.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
cluster-md-kmp-64kb - update to 5.3.18-150300.59.167.1
kernel-64kb - update to 5.3.18-150300.59.167.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.167.1
kernel-64kb-extra-debuginfo - update to 5.3.18-150300.59.167.1
dtb-allwinner - update to 5.3.18-150300.59.167.1
dtb-amd - update to 5.3.18-150300.59.167.1
ocfs2-kmp-64kb - update to 5.3.18-150300.59.167.1
dtb-lg - update to 5.3.18-150300.59.167.1
dtb-al - update to 5.3.18-150300.59.167.1
dtb-arm - update to 5.3.18-150300.59.167.1
reiserfs-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
kernel-64kb-extra - update to 5.3.18-150300.59.167.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.167.1
kernel-64kb-devel - update to 5.3.18-150300.59.167.1
dtb-zte - update to 5.3.18-150300.59.167.1
dtb-exynos - update to 5.3.18-150300.59.167.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
dtb-rockchip - update to 5.3.18-150300.59.167.1
dtb-broadcom - update to 5.3.18-150300.59.167.1
dtb-mediatek - update to 5.3.18-150300.59.167.1
kernel-64kb-optional-debuginfo - update to 5.3.18-150300.59.167.1
dtb-renesas - update to 5.3.18-150300.59.167.1
dtb-sprd - update to 5.3.18-150300.59.167.1
kselftests-kmp-64kb - update to 5.3.18-150300.59.167.1
dtb-freescale - update to 5.3.18-150300.59.167.1
dtb-qcom - update to 5.3.18-150300.59.167.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.167.1
dtb-amlogic - update to 5.3.18-150300.59.167.1
dtb-apm - update to 5.3.18-150300.59.167.1
kernel-64kb-optional - update to 5.3.18-150300.59.167.1
kernel-debug-debuginfo - update to 5.3.18-150300.59.167.1
kselftests-kmp-default-debuginfo - update to 5.3.18-150300.59.167.1
kernel-default-extra-debuginfo - update to 5.3.18-150300.59.167.1
kselftests-kmp-default - update to 5.3.18-150300.59.167.1
kernel-obs-qa - update to 5.3.18-150300.59.167.1
kernel-debug-devel - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-debuginfo - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-devel-debuginfo - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.167.1
kernel-debug-debugsource - update to 5.3.18-150300.59.167.1
kernel-debug-livepatch-devel - update to 5.3.18-150300.59.167.1
kernel-debug-devel-debuginfo - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-livepatch-devel - update to 5.3.18-150300.59.167.1
kernel-debug - update to 5.3.18-150300.59.167.1
kernel-kvmsmall - update to 5.3.18-150300.59.167.1
kernel-source-vanilla - update to 5.3.18-150300.59.167.1
kernel-docs-html - update to 5.3.18-150300.59.167.1
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.167.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.167.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.167.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.167.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
dlm-kmp-preempt - update to 5.3.18-150300.59.167.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.167.1
kernel-preempt-extra - update to 5.3.18-150300.59.167.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.167.1
kernel-default-optional - update to 5.3.18-150300.59.167.1
kernel-default-optional-debuginfo - update to 5.3.18-150300.59.167.1
kernel-default-extra - update to 5.3.18-150300.59.167.1
kernel-default-base-rebuild - update to 5.3.18-150300.59.167.1.150300.18.98.1
kernel-source-rt - update to 5.3.18-150300.175.1
kernel-rt-debuginfo - update to 5.3.18-150300.175.1
kernel-rt-debugsource - update to 5.3.18-150300.175.1
kernel-rt - update to 5.3.18-150300.175.1
kernel-tools-debuginfo - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
python3-perf-debuginfo - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
kernel-source - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
kernel-tools - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
perf-debuginfo - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
kernel-debugsource - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
kernel-devel - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
kernel-tools-devel - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
kernel-headers - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
kernel - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
perf - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
python3-perf - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
kernel-debuginfo - addressed in versions 5.10.0-136.79.0.159, 5.10.0-207.0.0.116
EMC Cloud Tiering Appliance - update to 13.2.0.2.31

• https://git.kernel.org/stable/c/b6447b72aca571632e71bb73a797118d5ce46a93
• https://git.kernel.org/stable/c/fb1a3132ee1ac968316e45d21a48703a6db0b6c3
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.237
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13

• Use-after-free in Linux kernel en rep driver
• openEuler 22.03 LTS SP3 update for kernel
• openEuler 22.03 LTS SP1 update for kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Multiple vulnerabilities in Dell Cloud Tiering Appliance