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CVE-2024-41020— filelock: Fix fcntl/close race recovery compat path

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，该漏洞源于在处理64位偏移量的32位内核的兼容路径中，未对代码进行相同的修复。

CVSS 7.8 · High EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux c293621bbf678a3d85e3ed721c3921c8a670610d< a561145f3ae973ebf3e0aee41624e92a6c5cb38d affected
c293621bbf678a3d85e3ed721c3921c8a670610d< 4c43ad4ab41602201d34c66ac62130fe339d686f affected
c293621bbf678a3d85e3ed721c3921c8a670610d< 911cc83e56a2de5a40758766c6a70d6998248860 affected
c293621bbf678a3d85e3ed721c3921c8a670610d< 53e21cfa68a7d12de378b7116c75571f73e0dfa2 affected
c293621bbf678a3d85e3ed721c3921c8a670610d< f4d0775c6e2f1340ca0725f0337de149aaa989ca affected
c293621bbf678a3d85e3ed721c3921c8a670610d< 73ae349534ebc377328e7d21891e589626c6e82c affected
c293621bbf678a3d85e3ed721c3921c8a670610d< 5b0af8e4c70e4b884bb94ff5f0cd49ecf1273c02 affected
c293621bbf678a3d85e3ed721c3921c8a670610d< ed898f9ca3fa32c56c858b463ceb9d9936cc69c4 affected
… +12 more rows
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I. Basic Information for CVE-2024-41020

Vulnerability Information
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Vulnerability Title
filelock: Fix fcntl/close race recovery compat path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: filelock: Fix fcntl/close race recovery compat path When I wrote commit 3cad1bc01041 ("filelock: Remove locks reliably when fcntl/close race is detected"), I missed that there are two copies of the code I was patching: The normal version, and the version for 64-bit offsets on 32-bit kernels. Thanks to Greg KH for stumbling over this while doing the stable backport... Apply exactly the same fix to the compat path for 32-bit kernels.
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，该漏洞源于在处理64位偏移量的32位内核的兼容路径中，未对代码进行相同的修复。
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 c293621bbf678a3d85e3ed721c3921c8a670610d ~ a561145f3ae973ebf3e0aee41624e92a6c5cb38d -
Linux Linux 2.6.13 -

II. Public POCs for CVE-2024-41020

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III. Intelligence Information for CVE-2024-41020

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Other References for CVE-2024-41020 (9)

Same Patch Batch · Linux · 2024-07-29 · 121 CVEs total

CVE-2024-41040 9.8 CRITICAL net/sched: Fix UAF when resolving a clash
CVE-2024-41081 9.8 CRITICAL ila: block BH in ila_output()
CVE-2024-41073 9.8 CRITICAL nvme: avoid double free special payload
CVE-2024-41091 8.8 HIGH tun: add missing verification for short frame
CVE-2024-41090 8.8 HIGH tap: add missing verification for short frame
CVE-2024-41046 8.8 HIGH net: ethernet: lantiq_etop: fix double free in detach
CVE-2024-42083 8.8 HIGH ionic: fix kernel panic due to multi-buffer handling
CVE-2024-41062 8.8 HIGH bluetooth/l2cap: sync sock recv cb and release
CVE-2024-41045 7.8 HIGH bpf: Defer work in bpf_timer_cancel_and_free
CVE-2024-41051 7.8 HIGH cachefiles: wait for ondemand_object_worker to finish when dropping object
CVE-2024-41049 7.8 HIGH filelock: fix potential use-after-free in posix_lock_inode
CVE-2024-41057 7.8 HIGH cachefiles: fix slab-use-after-free in cachefiles_withdraw_cookie()
CVE-2024-41060 7.8 HIGH drm/radeon: check bo_va->bo is non-NULL before using it
CVE-2024-41059 7.8 HIGH hfsplus: fix uninit-value in copy_name
CVE-2024-42075 7.8 HIGH bpf: Fix remap of arena.
CVE-2024-41064 7.8 HIGH powerpc/eeh: avoid possible crash when edev->pdev changes
CVE-2024-42072 7.8 HIGH bpf: Fix may_goto with negative offset.
CVE-2024-42064 7.8 HIGH drm/amd/display: Skip pipe if the pipe idx not set properly
CVE-2024-41086 7.8 HIGH bcachefs: Fix sb_field_downgrade validation
CVE-2024-41087 7.8 HIGH ata: libata-core: Fix double free on error

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-41020

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