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CVE-2022-50743— erofs: Fix pcluster memleak when its block address is zero

EPSS 0.03% · P9
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I. Basic Information for CVE-2022-50743

Vulnerability Information
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Vulnerability Title
erofs: Fix pcluster memleak when its block address is zero
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: erofs: Fix pcluster memleak when its block address is zero syzkaller reported a memleak: https://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed unreferenced object 0xffff88811009c7f8 (size 136): ... backtrace: [<ffffffff821db19b>] z_erofs_do_read_page+0x99b/0x1740 [<ffffffff821dee9e>] z_erofs_readahead+0x24e/0x580 [<ffffffff814bc0d6>] read_pages+0x86/0x3d0 ... syzkaller constructed a case: in z_erofs_register_pcluster(), ztailpacking = false and map->m_pa = zero. This makes pcl->obj.index be zero although pcl is not a inline pcluster. Then following path adds refcount for grp, but the refcount won't be put because pcl is inline. z_erofs_readahead() z_erofs_do_read_page() # for another page z_erofs_collector_begin() erofs_find_workgroup() erofs_workgroup_get() Since it's illegal for the block address of a non-inlined pcluster to be zero, add check here to avoid registering the pcluster which would be leaked.
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，该漏洞源于未检查非内联pcluster的块地址，可能导致内存泄漏。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux cecf864d3d76d50e3d9c58145e286a0b8c284e92 ~ ac54c1f7b288d83b6ba1e320efff24ecc21309cd -
LinuxLinux 5.17 -

II. Public POCs for CVE-2022-50743

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III. Intelligence Information for CVE-2022-50743

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Same Patch Batch · Linux · 2025-12-24 · 322 CVEs total

CVE-2022-50755udf: Avoid double brelse() in udf_rename()
CVE-2022-50765RISC-V: kexec: Fix memory leak of elf header buffer
CVE-2022-50764ipv6/sit: use DEV_STATS_INC() to avoid data-races
CVE-2022-50763crypto: marvell/octeontx - prevent integer overflows
CVE-2022-50762fs/ntfs3: Avoid UBSAN error on true_sectors_per_clst()
CVE-2022-50760drm/amdgpu: Fix PCI device refcount leak in amdgpu_atrm_get_bios()
CVE-2022-50761x86/xen: Fix memory leak in xen_init_lock_cpu()
CVE-2022-50759media: i2c: ov5648: Free V4L2 fwnode data on unbind
CVE-2022-50758staging: vt6655: fix potential memory leak
CVE-2022-50756nvme-pci: fix mempool alloc size
CVE-2022-50757media: camss: Clean up received buffers on failed start of streaming
CVE-2022-50749acct: fix potential integer overflow in encode_comp_t()
CVE-2022-50746erofs: validate the extent length for uncompressed pclusters
CVE-2022-50747hfs: Fix OOB Write in hfs_asc2mac
CVE-2022-50748ipc: mqueue: fix possible memory leak in init_mqueue_fs()
CVE-2022-50750drm/panel/panel-sitronix-st7701: Remove panel on DSI attach failure
CVE-2022-50752md/raid5: Remove unnecessary bio_put() in raid5_read_one_chunk()
CVE-2022-50753f2fs: fix to do sanity check on summary info
CVE-2022-50754apparmor: fix a memleak in multi_transaction_new()
CVE-2022-50766btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer

Showing top 20 of 322 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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