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CVE-2022-50567— fs: jfs: fix shift-out-of-bounds in dbAllocAG

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于缺少对bmp->db_agl2size的检查，可能导致越界移位。

CVSS 7.8 · High EPSS 0.17% · P6

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< d3b486946a4e62c7ef6023f7d9c1d049051384ba affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3115313cf03113e87c87adee18ee49a20bbdb9ba affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< eea87acb6027be3dd4d3c57186bb22800d57fdda affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 359616ce587e524107730504891afa4b1a8be58c affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 0536f76a2bca83d1a3740517ba22cc93a44b3099 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 2c575c8905f7a8b32d5611b91856b69bac2a5bf1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 67973caae78e21ee46a7281aaa8ca364eb9c444f affected
… +12 more rows
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I. Basic Information for CVE-2022-50567

Vulnerability Information
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Vulnerability Title
fs: jfs: fix shift-out-of-bounds in dbAllocAG
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbAllocAG Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The underlying bug is the missing check of bmp->db_agl2size. The field can be greater than 64 and trigger the shift-out-of-bounds. Fix this bug by adding a check of bmp->db_agl2size in dbMount since this field is used in many following functions. The upper bound for this field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp. Note that, for maintenance, I reorganized error handling code of dbMount.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于缺少对bmp->db_agl2size的检查，可能导致越界移位。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ d3b486946a4e62c7ef6023f7d9c1d049051384ba -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2022-50567

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III. Intelligence Information for CVE-2022-50567

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Patches & Fixes for CVE-2022-50567 (9)

Same Patch Batch · Linux · 2025-10-22 · 67 CVEs total

CVE-2023-53705 8.2 HIGH ipv6: Fix out-of-bounds access in ipv6_find_tlv()
CVE-2023-53711 8.2 HIGH NFS: Fix a potential data corruption
CVE-2023-53713 7.8 HIGH arm64: sme: Use STR P to clear FFR context field in streaming SVE mode
CVE-2023-53729 7.8 HIGH soc: qcom: qmi_encdec: Restrict string length in decode
CVE-2023-53698 7.8 HIGH xsk: fix refcount underflow in error path
CVE-2023-53707 7.8 HIGH drm/amdgpu: Fix integer overflow in amdgpu_cs_pass1
CVE-2023-53695 7.8 HIGH udf: Detect system inodes linked into directory hierarchy
CVE-2022-50581 7.8 HIGH hfs: fix OOB Read in __hfs_brec_find
CVE-2023-53692 7.8 HIGH ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline
CVE-2022-50570 7.8 HIGH platform/chrome: fix memory corruption in ioctl
CVE-2022-50569 7.8 HIGH xfrm: Update ipcomp_scratches with NULL when freed
CVE-2023-53718 7.8 HIGH ring-buffer: Do not swap cpu_buffer during resize process
CVE-2023-53726 7.1 HIGH arm64: csum: Fix OoB access in IP checksum code for negative lengths
CVE-2023-53704 clk: imx: clk-imx8mp: improve error handling in imx8mp_clocks_probe()
CVE-2023-53710 wifi: mt76: mt7921: fix error code of return in mt7921_acpi_read
CVE-2023-53706 mm/vmemmap/devdax: fix kernel crash when probing devdax devices
CVE-2023-53709 ring-buffer: Handle race between rb_move_tail and rb_check_pages
CVE-2023-53708 ACPI: x86: s2idle: Catch multiple ACPI_TYPE_PACKAGE objects
CVE-2023-53712 ARM: 9317/1: kexec: Make smp stop calls asynchronous
CVE-2023-53714 drm/stm: ltdc: fix late dereference check

Showing top 20 of 67 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50567

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