CVE-2024-44941— f2fs: fix to cover read extent cache access with lock
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I. Basic Information for CVE-2024-44941
Vulnerability Information
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Vulnerability Title
f2fs: fix to cover read extent cache access with lock
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to cover read extent cache access with lock syzbot reports a f2fs bug as below: BUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46 Read of size 4 at addr ffff8880739ab220 by task syz-executor200/5097 CPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46 do_read_inode fs/f2fs/inode.c:509 [inline] f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560 f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237 generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413 exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584 do_handle_to_path fs/fhandle.c:155 [inline] handle_to_path fs/fhandle.c:210 [inline] do_handle_open+0x495/0x650 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f We missed to cover sanity_check_extent_cache() w/ extent cache lock, so, below race case may happen, result in use after free issue. - f2fs_iget - do_read_inode - f2fs_init_read_extent_tree : add largest extent entry in to cache - shrink - f2fs_shrink_read_extent_tree - __shrink_extent_tree - __detach_extent_node : drop largest extent entry - sanity_check_extent_cache : access et->largest w/o lock let's refactor sanity_check_extent_cache() to avoid extent cache access and call it before f2fs_init_read_extent_tree() to fix this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在sanity_check_extent_cache函数中未正确锁定，导致内存释放后重用问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-44941
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Same Patch Batch · Linux · 2024-08-26 · 39 CVEs total
| CVE-2024-44933 | bnxt_en : Fix memory out-of-bounds in bnxt_fill_hw_rss_tbl() | |
| CVE-2024-43908 | drm/amdgpu: Fix the null pointer dereference to ras_manager | |
| CVE-2024-43909 | drm/amdgpu/pm: Fix the null pointer dereference for smu7 | |
| CVE-2024-43910 | bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses | |
| CVE-2024-43911 | wifi: mac80211: fix NULL dereference at band check in starting tx ba session | |
| CVE-2024-43912 | wifi: nl80211: disallow setting special AP channel widths | |
| CVE-2024-43913 | nvme: apple: fix device reference counting | |
| CVE-2024-43914 | md/raid5: avoid BUG_ON() while continue reshape after reassembling | |
| CVE-2024-44931 | gpio: prevent potential speculation leaks in gpio_device_get_desc() | |
| CVE-2024-44932 | idpf: fix UAFs when destroying the queues | |
| CVE-2024-43907 | drm/amdgpu/pm: Fix the null pointer dereference in apply_state_adjust_rules | |
| CVE-2024-44934 | net: bridge: mcast: wait for previous gc cycles when removing port | |
| CVE-2024-44935 | sctp: Fix null-ptr-deref in reuseport_add_sock(). | |
| CVE-2024-44936 | power: supply: rt5033: Bring back i2c_set_clientdata | |
| CVE-2024-44937 | platform/x86: intel-vbtn: Protect ACPI notify handler against recursion | |
| CVE-2024-44938 | jfs: Fix shift-out-of-bounds in dbDiscardAG | |
| CVE-2024-44939 | jfs: fix null ptr deref in dtInsertEntry | |
| CVE-2024-44940 | fou: remove warn in gue_gro_receive on unsupported protocol | |
| CVE-2024-44942 | f2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC | |
| CVE-2024-43896 | ASoC: cs-amp-lib: Fix NULL pointer crash if efi.get_variable is NULL |
Showing top 20 of 39 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
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