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CVE-2023-52436— f2fs: explicitly null-terminate the xattr list

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 f2fs 设置 xattr 时，显式以 null 终止 xattr 列表。

CVSS 7.8 · High EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux af48b85b8cd3fbb12c9b6759c16db6d69c0b03da< 16ae3132ff7746894894927c1892493693b89135 affected
af48b85b8cd3fbb12c9b6759c16db6d69c0b03da< 12cf91e23b126718a96b914f949f2cdfeadc7b2a affected
af48b85b8cd3fbb12c9b6759c16db6d69c0b03da< 3e47740091b05ac8d7836a33afd8646b6863ca52 affected
af48b85b8cd3fbb12c9b6759c16db6d69c0b03da< 32a6cfc67675ee96fe107aeed5af9776fec63f11 affected
af48b85b8cd3fbb12c9b6759c16db6d69c0b03da< 5de9e9dd1828db9b8b962f7ca42548bd596deb8a affected
af48b85b8cd3fbb12c9b6759c16db6d69c0b03da< 2525d1ba225b5c167162fa344013c408e8b4de36 affected
af48b85b8cd3fbb12c9b6759c16db6d69c0b03da< f6c30bfe5a49bc38cae985083a11016800708fea affected
af48b85b8cd3fbb12c9b6759c16db6d69c0b03da< e26b6d39270f5eab0087453d9b544189a38c8564 affected
… +10 more rows
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I. Basic Information for CVE-2023-52436

Vulnerability Information
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Vulnerability Title
f2fs: explicitly null-terminate the xattr list
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: explicitly null-terminate the xattr list When setting an xattr, explicitly null-terminate the xattr list. This eliminates the fragile assumption that the unused xattr space is always zeroed.
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 f2fs 设置 xattr 时，显式以 null 终止 xattr 列表。
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 af48b85b8cd3fbb12c9b6759c16db6d69c0b03da ~ 16ae3132ff7746894894927c1892493693b89135 -
Linux Linux 3.8 -

II. Public POCs for CVE-2023-52436

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III. Intelligence Information for CVE-2023-52436

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Mailing List Discussions for CVE-2023-52436 (2)

Other References for CVE-2023-52436 (8)

Same Patch Batch · Linux · 2024-02-20 · 7 CVEs total

CVE-2023-52434 8.1 HIGH smb: client: fix potential OOBs in smb2_parse_contexts()
CVE-2023-52433 7.8 HIGH netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction
CVE-2024-26581 7.8 HIGH netfilter: nft_set_rbtree: skip end interval element from gc
CVE-2023-52438 7.8 HIGH binder: fix use-after-free in shinker's callback
CVE-2023-52439 7.8 HIGH uio: Fix use-after-free in uio_open
CVE-2023-52435 net: prevent mss overflow in skb_segment()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52436

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