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CVE-2023-52444— f2fs: fix to avoid dirent corruption

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，该漏洞源于跨目录重命名会将源移动到新的父级。

CVSS 7.8 · High EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1562

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 7e01e7ad746bc8198a8b46163ddc73a1c7d22339< 02160112e6d45c2610b049df6eb693d7a2e57b46 affected
7e01e7ad746bc8198a8b46163ddc73a1c7d22339< 5624a3c1b1ebc8991318e1cce2aa719542991024 affected
7e01e7ad746bc8198a8b46163ddc73a1c7d22339< 6f866885e147d33efc497f1095f35b2ee5ec7310 affected
7e01e7ad746bc8198a8b46163ddc73a1c7d22339< f100ba617d8be6c98a68f3744ef7617082975b77 affected
7e01e7ad746bc8198a8b46163ddc73a1c7d22339< f0145860c20be6bae6785c7a2249577674702ac7 affected
7e01e7ad746bc8198a8b46163ddc73a1c7d22339< d3c0b49aaa12a61d560528f5d605029ab57f0728 affected
7e01e7ad746bc8198a8b46163ddc73a1c7d22339< 2fb4867f4405aea8c0519d7d188207f232a57862 affected
7e01e7ad746bc8198a8b46163ddc73a1c7d22339< 53edb549565f55ccd0bdf43be3d66ce4c2d48b28 affected
… +10 more rows
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I. Basic Information for CVE-2023-52444

Vulnerability Information
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Vulnerability Title
f2fs: fix to avoid dirent corruption
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid dirent corruption As Al reported in link[1]: f2fs_rename() ... if (old_dir != new_dir && !whiteout) f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); else f2fs_put_page(old_dir_page, 0); You want correct inumber in the ".." link. And cross-directory rename does move the source to new parent, even if you'd been asked to leave a whiteout in the old place. [1] https://lore.kernel.org/all/20231017055040.GN800259@ZenIV/ With below testcase, it may cause dirent corruption, due to it missed to call f2fs_set_link() to update ".." link to new directory. - mkdir -p dir/foo - renameat2 -w dir/foo bar [ASSERT] (__chk_dots_dentries:1421) --> Bad inode number[0x4] for '..', parent parent ino is [0x3] [FSCK] other corrupted bugs [Fail]
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，该漏洞源于跨目录重命名会将源移动到新的父级。
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 7e01e7ad746bc8198a8b46163ddc73a1c7d22339 ~ 02160112e6d45c2610b049df6eb693d7a2e57b46 -
Linux Linux 4.2 -

II. Public POCs for CVE-2023-52444

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III. Intelligence Information for CVE-2023-52444

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Mailing List Discussions for CVE-2023-52444 (2)

Other References for CVE-2023-52444 (8)

Same Patch Batch · Linux · 2024-02-22 · 17 CVEs total

CVE-2024-26592 9.8 CRITICAL ksmbd: fix UAF issue in ksmbd_tcp_new_connection()
CVE-2023-52447 7.8 HIGH bpf: Defer the free of inner map when necessary
CVE-2024-26589 7.8 HIGH bpf: Reject variable offset alu on PTR_TO_FLOW_KEYS
CVE-2024-26586 7.8 HIGH mlxsw: spectrum_acl_tcam: Fix stack corruption
CVE-2024-26591 bpf: Fix re-attachment branch in bpf_tracing_prog_attach
CVE-2023-52452 bpf: Fix accesses to uninit stack slots
CVE-2023-52451 powerpc/pseries/memhp: Fix access beyond end of drmem array
CVE-2023-52450 perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology()
CVE-2023-52449 mtd: Fix gluebi NULL pointer dereference caused by ftl notifier
CVE-2023-52448 gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump
CVE-2023-52446 bpf: Fix a race condition between btf_put() and map_free()
CVE-2023-52445 media: pvrusb2: fix use after free on context disconnection
CVE-2024-26590 erofs: fix inconsistent per-file compression format
CVE-2024-26588 LoongArch: BPF: Prevent out-of-bounds memory access
CVE-2024-26587 net: netdevsim: don't try to destroy PHC on VFs
CVE-2023-52443 apparmor: avoid crash when parsed profile name is empty

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52444

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