Use-after-free in Linux kernel - CVE-2022-49909

Vulnerability identifier: #VU108229

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-2022-49909

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 l2cap_data_channel() function in net/bluetooth/l2cap_core.c. A local user can escalate privileges on the system.

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
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 Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Live Patching
Ubuntu
openSUSE Leap
kgraft-patch-4_12_14-122_261-default
kernel-livepatch-5_14_21-150400_24_167-default-debuginfo
kernel-livepatch-5_14_21-150400_24_167-default
kernel-livepatch-SLE15-SP4_Update_41-debugsource
kernel-livepatch-5_14_21-150500_55_110-default-debuginfo
kernel-livepatch-5_14_21-150500_55_110-default
kernel-livepatch-SLE15-SP5_Update_27-debugsource
linux (Ubuntu package)
linux-fips (Ubuntu package)
linux-kvm (Ubuntu package)
dlm-kmp-default
ocfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
kernel-default-debuginfo
kernel-default-debugsource
cluster-md-kmp-default
kernel-syms
ocfs2-kmp-default
gfs2-kmp-default
gfs2-kmp-default-debuginfo
kernel-default-devel
kernel-default-base
kernel-default-base-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default
kernel-source
kernel-macros
kernel-devel
kernel-default-man
kernel-default-devel-debuginfo
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-rt-debugsource
kernel-rt
kernel-rt-debuginfo
kernel-source-rt
kernel-default-livepatch-devel
kernel-default-livepatch
reiserfs-kmp-rt
kernel-rt_debug-vdso-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt_debug
kernel-rt-livepatch-devel
ocfs2-kmp-rt
gfs2-kmp-rt
cluster-md-kmp-rt
kernel-rt-vdso
kernel-rt_debug-vdso
kernel-rt-optional
kernel-devel-rt
kernel-rt-extra-debuginfo
kernel-rt_debug-devel-debuginfo
kernel-rt-devel
gfs2-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
kselftests-kmp-rt
kernel-syms-rt
kernel-rt-devel-debuginfo
kernel-rt_debug-devel
dlm-kmp-rt
kernel-rt_debug-debugsource
kernel-rt_debug-debuginfo
kernel-rt-livepatch
reiserfs-kmp-rt-debuginfo
kselftests-kmp-rt-debuginfo
kernel-rt-extra
kernel-rt-vdso-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt-optional-debuginfo

Install update from vendor's website.

Linux kernel - update to 4.9.333
kgraft-patch-4_12_14-122_261-default - update to 1-8.3.1
kernel-livepatch-5_14_21-150400_24_167-default-debuginfo - update to 1-150400.9.3.1
kernel-livepatch-5_14_21-150400_24_167-default - update to 1-150400.9.3.1
kernel-livepatch-SLE15-SP4_Update_41-debugsource - update to 1-150400.9.3.1
kernel-livepatch-5_14_21-150500_55_110-default-debuginfo - update to 1-150500.11.7.1
kernel-livepatch-5_14_21-150500_55_110-default - update to 1-150500.11.7.1
kernel-livepatch-SLE15-SP5_Update_27-debugsource - update to 1-150500.11.7.1
linux (Ubuntu package) - addressed in versions 4.4.0.270.276, 4.4.0-270.304, 4.4.0.270.304~14.04.1, 4.4.0-270.304~14.04.1, 4.4.0.1145.142, 4.4.0-1145.151, 4.4.0.1183.187, 4.4.0-1183.198
linux-fips (Ubuntu package) - addressed in versions 4.4.0.1115.116, 4.4.0-1115.122
linux-kvm (Ubuntu package) - addressed in versions 4.4.0.1146.143, 4.4.0-1146.157
dlm-kmp-default - update to 4.12.14-122.261.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.261.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.261.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.261.1, 5.14.21-150400.24.167.1, 5.14.21-150500.55.110.1
kernel-default-debugsource - addressed in versions 4.12.14-122.261.1, 5.14.21-150400.24.167.1, 5.14.21-150500.55.110.1
cluster-md-kmp-default - update to 4.12.14-122.261.1
kernel-syms - update to 4.12.14-122.261.1
ocfs2-kmp-default - update to 4.12.14-122.261.1
gfs2-kmp-default - update to 4.12.14-122.261.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.261.1
kernel-default-devel - update to 4.12.14-122.261.1
kernel-default-base - update to 4.12.14-122.261.1
kernel-default-base-debuginfo - update to 4.12.14-122.261.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.261.1
kernel-default - addressed in versions 4.12.14-122.261.1, 5.14.21-150400.24.167.1, 5.14.21-150500.55.110.1
kernel-source - update to 4.12.14-122.261.1
kernel-macros - update to 4.12.14-122.261.1
kernel-devel - update to 4.12.14-122.261.1
kernel-default-man - update to 4.12.14-122.261.1
kernel-default-devel-debuginfo - update to 4.12.14-122.261.1
kernel-default-kgraft - update to 4.12.14-122.261.1
kernel-default-kgraft-devel - update to 4.12.14-122.261.1
kernel-rt-debugsource - addressed in versions 5.14.21-150400.15.121.1, 5.14.21-150500.13.97.1
kernel-rt - addressed in versions 5.14.21-150400.15.121.1, 5.14.21-150500.13.97.1
kernel-rt-debuginfo - addressed in versions 5.14.21-150400.15.121.1, 5.14.21-150500.13.97.1
kernel-source-rt - addressed in versions 5.14.21-150400.15.121.1, 5.14.21-150500.13.97.1
kernel-default-livepatch-devel - addressed in versions 5.14.21-150400.24.167.1, 5.14.21-150500.55.110.1
kernel-default-livepatch - addressed in versions 5.14.21-150400.24.167.1, 5.14.21-150500.55.110.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.97.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.97.1
cluster-md-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt_debug - update to 5.14.21-150500.13.97.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.97.1
ocfs2-kmp-rt - update to 5.14.21-150500.13.97.1
gfs2-kmp-rt - update to 5.14.21-150500.13.97.1
cluster-md-kmp-rt - update to 5.14.21-150500.13.97.1
kernel-rt-vdso - update to 5.14.21-150500.13.97.1
kernel-rt_debug-vdso - update to 5.14.21-150500.13.97.1
kernel-rt-optional - update to 5.14.21-150500.13.97.1
kernel-devel-rt - update to 5.14.21-150500.13.97.1
kernel-rt-extra-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt_debug-devel-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt-devel - update to 5.14.21-150500.13.97.1
gfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
kselftests-kmp-rt - update to 5.14.21-150500.13.97.1
kernel-syms-rt - update to 5.14.21-150500.13.97.1
kernel-rt-devel-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt_debug-devel - update to 5.14.21-150500.13.97.1
dlm-kmp-rt - update to 5.14.21-150500.13.97.1
kernel-rt_debug-debugsource - update to 5.14.21-150500.13.97.1
kernel-rt_debug-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt-livepatch - update to 5.14.21-150500.13.97.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt-extra - update to 5.14.21-150500.13.97.1
kernel-rt-vdso-debuginfo - update to 5.14.21-150500.13.97.1
ocfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.97.1

• https://git.kernel.org/stable/c/0d0e2d032811280b927650ff3c15fe5020e82533
• https://git.kernel.org/stable/c/17c6164854f8bb80bf76f32b2c2f199c16b53703
• https://git.kernel.org/stable/c/7f7bfdd9a9af3b12c33d9da9a012e7f4d5c91f4b
• https://git.kernel.org/stable/c/8f7e4cf0694149a5d999d676ebd9ecf1b4cb2cc9
• https://git.kernel.org/stable/c/a3a7b2ac64de232edb67279e804932cb42f0b52a
• https://git.kernel.org/stable/c/c1f594dddd9ffd747c39f49cc5b67a9b7677d2ab
• https://git.kernel.org/stable/c/d9ec6e2fbd4a565b2345d4852f586b7ae3ab41fd
• https://git.kernel.org/stable/c/db4a0783ed78beb2ebaa32f5f785bfd79c580689
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.333

• Use-after-free in Linux kernel bluetooth
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux
• Ubuntu update for linux-fips
• Ubuntu update for linux-kvm
• Ubuntu live patch for Linux kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel