Improper locking in Linux kernel - CVE-2022-49850

Vulnerability identifier: #VU108303

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-49850

CWE-ID: CWE-667

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the kvm_gfn_to_pfn_cache_unmap(), kvm_gfn_to_pfn_cache_init() and kvm_gfn_to_pfn_cache_destroy() functions in virt/kvm/pfncache.c, within the kvm_xen_shared_info_init(), kvm_xen_vcpu_set_attr(), kvm_xen_init_vcpu(), kvm_xen_destroy_vcpu() and kvm_xen_destroy_vm() functions in arch/x86/kvm/xen.c, within the kvm_write_system_time(), kvm_pv_enable_async_pf_int() and kvm_arch_vcpu_create() functions in arch/x86/kvm/x86.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
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 Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Enterprise Live Patching
openSUSE Leap
openEuler
kernel-livepatch-SLE15-SP4_Update_41-debugsource
kernel-livepatch-5_14_21-150400_24_167-default
kernel-livepatch-5_14_21-150400_24_167-default-debuginfo
kernel-livepatch-SLE15-SP5_Update_27-debugsource
kernel-livepatch-5_14_21-150500_55_110-default
kernel-livepatch-5_14_21-150500_55_110-default-debuginfo
python3-perf-debuginfo
kernel
python3-perf
python2-perf-debuginfo
python2-perf
perf
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf-debuginfo
kernel-source-rt
kernel-rt-debuginfo
kernel-rt-debugsource
kernel-rt
kernel-default-debugsource
kernel-default-livepatch
kernel-default-debuginfo
kernel-default-livepatch-devel
kernel-default
ocfs2-kmp-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt_debug-devel-debuginfo
kernel-rt_debug
kernel-rt_debug-vdso-debuginfo
kernel-rt-livepatch-devel
kernel-rt-devel
gfs2-kmp-rt
cluster-md-kmp-rt
kernel-rt-vdso
kernel-rt_debug-vdso
kernel-rt-optional
kernel-devel-rt
kernel-syms-rt
reiserfs-kmp-rt
kernel-rt-optional-debuginfo
kernel-rt-extra-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt-vdso-debuginfo
kernel-rt-extra
kselftests-kmp-rt-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-rt-livepatch
kernel-rt_debug-debuginfo
kernel-rt_debug-debugsource
dlm-kmp-rt
kernel-rt_debug-devel
kernel-rt-devel-debuginfo
kselftests-kmp-rt

Install update from vendor's website.

Linux kernel - update to 4.19.267
kernel-livepatch-SLE15-SP4_Update_41-debugsource - 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-5_14_21-150400_24_167-default-debuginfo - update to 1-150400.9.3.1
kernel-livepatch-SLE15-SP5_Update_27-debugsource - 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-5_14_21-150500_55_110-default-debuginfo - update to 1-150500.11.7.1
python3-perf-debuginfo - update to 4.19.90-2505.3.0.0327
kernel - update to 4.19.90-2505.3.0.0327
python3-perf - update to 4.19.90-2505.3.0.0327
python2-perf-debuginfo - update to 4.19.90-2505.3.0.0327
python2-perf - update to 4.19.90-2505.3.0.0327
perf - update to 4.19.90-2505.3.0.0327
bpftool - update to 4.19.90-2505.3.0.0327
bpftool-debuginfo - update to 4.19.90-2505.3.0.0327
kernel-debuginfo - update to 4.19.90-2505.3.0.0327
kernel-debugsource - update to 4.19.90-2505.3.0.0327
kernel-devel - update to 4.19.90-2505.3.0.0327
kernel-source - update to 4.19.90-2505.3.0.0327
kernel-tools - update to 4.19.90-2505.3.0.0327
kernel-tools-debuginfo - update to 4.19.90-2505.3.0.0327
kernel-tools-devel - update to 4.19.90-2505.3.0.0327
perf-debuginfo - update to 4.19.90-2505.3.0.0327
kernel-source-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-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-default-debugsource - 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
kernel-default-debuginfo - addressed in versions 5.14.21-150400.24.167.1, 5.14.21-150500.55.110.1
kernel-default-livepatch-devel - addressed in versions 5.14.21-150400.24.167.1, 5.14.21-150500.55.110.1
kernel-default - addressed in versions 5.14.21-150400.24.167.1, 5.14.21-150500.55.110.1
ocfs2-kmp-rt - update to 5.14.21-150500.13.97.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
gfs2-kmp-rt-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-devel-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt_debug - update to 5.14.21-150500.13.97.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.97.1
kernel-rt-devel - 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-syms-rt - update to 5.14.21-150500.13.97.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.97.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt-extra-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-vdso-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt-extra - update to 5.14.21-150500.13.97.1
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt-livepatch - update to 5.14.21-150500.13.97.1
kernel-rt_debug-debuginfo - update to 5.14.21-150500.13.97.1
kernel-rt_debug-debugsource - update to 5.14.21-150500.13.97.1
dlm-kmp-rt - update to 5.14.21-150500.13.97.1
kernel-rt_debug-devel - update to 5.14.21-150500.13.97.1
kernel-rt-devel-debuginfo - update to 5.14.21-150500.13.97.1
kselftests-kmp-rt - update to 5.14.21-150500.13.97.1

• https://git.kernel.org/stable/c/1d4ff73062096c21b47954d2996b4df259777bda
• https://git.kernel.org/stable/c/36ff974b0310771417c0be64b64aa221bd70d63d
• https://git.kernel.org/stable/c/3c89ca6d3dfa6c09c515807a7a97a521f5d5147e
• https://git.kernel.org/stable/c/8ac932a4921a96ca52f61935dbba64ea87bbd5dc
• https://git.kernel.org/stable/c/8b4506cff6630bb474bb46a2a75c31e533a756ba
• https://git.kernel.org/stable/c/abc082aac0d9b6b926038fc3adb7008306581be2
• https://git.kernel.org/stable/c/cb029b54953420f7a2d65100f1c5107f14411bdc
• https://git.kernel.org/stable/c/f0cc93080d4c09510b74ecba87fd778cca390bb1
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.267

• Improper locking in Linux kernel x86 kvm
• openEuler 20.03 LTS SP4 update for kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel