CVE-2022-50747— hfs: Fix OOB Write in hfs_asc2mac
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I. Basic Information for CVE-2022-50747
Vulnerability Information
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Vulnerability Title
hfs: Fix OOB Write in hfs_asc2mac
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: hfs: Fix OOB Write in hfs_asc2mac Syzbot reported a OOB Write bug: loop0: detected capacity change from 0 to 64 ================================================================== BUG: KASAN: slab-out-of-bounds in hfs_asc2mac+0x467/0x9a0 fs/hfs/trans.c:133 Write of size 1 at addr ffff88801848314e by task syz-executor391/3632 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 hfs_asc2mac+0x467/0x9a0 fs/hfs/trans.c:133 hfs_cat_build_key+0x92/0x170 fs/hfs/catalog.c:28 hfs_lookup+0x1ab/0x2c0 fs/hfs/dir.c:31 lookup_open fs/namei.c:3391 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0x10e6/0x2df0 fs/namei.c:3710 do_filp_open+0x264/0x4f0 fs/namei.c:3740 If in->len is much larger than HFS_NAMELEN(31) which is the maximum length of an HFS filename, a OOB write could occur in hfs_asc2mac(). In that case, when the dst reaches the boundary, the srclen is still greater than 0, which causes a OOB write. Fix this by adding a check on dstlen in while() before writing to dst address.
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hfs_asc2mac函数中长度检查不足，可能导致越界写入。
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-2022-50747
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Same Patch Batch · Linux · 2025-12-24 · 322 CVEs total
| CVE-2022-50755 | udf: Avoid double brelse() in udf_rename() | |
| CVE-2022-50765 | RISC-V: kexec: Fix memory leak of elf header buffer | |
| CVE-2022-50764 | ipv6/sit: use DEV_STATS_INC() to avoid data-races | |
| CVE-2022-50763 | crypto: marvell/octeontx - prevent integer overflows | |
| CVE-2022-50762 | fs/ntfs3: Avoid UBSAN error on true_sectors_per_clst() | |
| CVE-2022-50760 | drm/amdgpu: Fix PCI device refcount leak in amdgpu_atrm_get_bios() | |
| CVE-2022-50761 | x86/xen: Fix memory leak in xen_init_lock_cpu() | |
| CVE-2022-50759 | media: i2c: ov5648: Free V4L2 fwnode data on unbind | |
| CVE-2022-50758 | staging: vt6655: fix potential memory leak | |
| CVE-2022-50756 | nvme-pci: fix mempool alloc size | |
| CVE-2022-50757 | media: camss: Clean up received buffers on failed start of streaming | |
| CVE-2022-50749 | acct: fix potential integer overflow in encode_comp_t() | |
| CVE-2022-50745 | staging: media: tegra-video: fix device_node use after free | |
| CVE-2022-50746 | erofs: validate the extent length for uncompressed pclusters | |
| CVE-2022-50748 | ipc: mqueue: fix possible memory leak in init_mqueue_fs() | |
| CVE-2022-50750 | drm/panel/panel-sitronix-st7701: Remove panel on DSI attach failure | |
| CVE-2022-50752 | md/raid5: Remove unnecessary bio_put() in raid5_read_one_chunk() | |
| CVE-2022-50753 | f2fs: fix to do sanity check on summary info | |
| CVE-2022-50754 | apparmor: fix a memleak in multi_transaction_new() | |
| CVE-2022-50766 | btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer |
Showing top 20 of 322 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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