Race condition in Linux kernel - CVE-2024-56686

Vulnerability identifier: #VU102218

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-2024-56686

CWE-ID: CWE-362

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 race condition within the MODULE_ALIAS(), __ext4_read_bh(), ext4_read_bh_nowait(), ext4_read_bh(), ext4_read_bh_lock() and ext4_sb_breadahead_unmovable() functions in fs/ext4/super.c, within the ext4_get_bitmap() function in fs/ext4/resize.c, within the mext_page_mkuptodate() function in fs/ext4/move_extent.c, within the read_mmp_block() function in fs/ext4/mmp.c, within the trace_ext4_load_inode() function in fs/ext4/inode.c, within the ext4_get_branch() function in fs/ext4/indirect.c, within the ext4_read_inode_bitmap() function in fs/ext4/ialloc.c, within the __read_extent_tree_block() function in fs/ext4/extents.c, within the ext4_read_block_bitmap_nowait() and ext4_wait_block_bitmap() functions in fs/ext4/balloc.c. A local user can escalate privileges on the system.

Linux kernel
Anolis OS
openEuler
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
kernel
bpftool
bpftool-debuginfo
kernel-core
kernel-debug
kernel-debug-core
kernel-debug-devel
kernel-debug-modules
kernel-debug-modules-extra
kernel-debug-modules-internal
kernel-modules
kernel-modules-extra
kernel-modules-internal
kernel-tools-libs
kernel-tools-libs-devel

Install update from vendor's website.

Linux kernel - update to 6.6.64
python3-perf-debuginfo - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
python3-perf - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
perf-debuginfo - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
perf - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel-tools-devel - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel-tools-debuginfo - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel-tools - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel-source - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel-headers - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel-devel - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel-debugsource - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel-debuginfo - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
kernel - addressed in versions 5.10.0-136.108.0.188, 5.10.0-245.0.0.144, 5.10.0-245.0.0.147, 6.6.0-77.0.0.70
bpftool - addressed in versions 5.10.0-245.0.0.144, 6.6.0-77.0.0.70
bpftool-debuginfo - addressed in versions 5.10.0-245.0.0.144, 6.6.0-77.0.0.70
kernel-core - update to 5.10.134-19
python3-perf - update to 5.10.134-19
kernel-debug - update to 5.10.134-19
kernel-debug-core - update to 5.10.134-19
kernel-debug-devel - update to 5.10.134-19
kernel-debug-modules - update to 5.10.134-19
kernel-debug-modules-extra - update to 5.10.134-19
kernel-debug-modules-internal - update to 5.10.134-19
kernel-devel - update to 5.10.134-19
kernel-headers - update to 5.10.134-19
kernel-modules - update to 5.10.134-19
kernel-modules-extra - update to 5.10.134-19
kernel-modules-internal - update to 5.10.134-19
kernel-tools - update to 5.10.134-19
kernel-tools-libs - update to 5.10.134-19
kernel-tools-libs-devel - update to 5.10.134-19
perf - update to 5.10.134-19
bpftool - update to 5.10.134-19
kernel - update to 5.10.134-19

• https://git.kernel.org/stable/c/25a5acf88fed59e060405bbb48098f4a3a2c2adc
• https://git.kernel.org/stable/c/2f3d93e210b9c2866c8b3662adae427d5bf511ec
• https://git.kernel.org/stable/c/61832ee7fa2fbd569d129379e795038abfb0d128
• https://git.kernel.org/stable/c/77035e4d27e15f87ea55929c8bb8fb1970129e2f
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.64

• Race condition in Linux kernel ext4
• openEuler 22.03 LTS SP4 update for kernel
• openEuler 22.03 LTS SP1 update for kernel
• openEuler 22.03 LTS SP3 update for kernel
• openEuler 24.03 LTS update for kernel
• Anolis OS update for kernel:5.10