7.8

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

Modified
AliasesUBUNTU-CVE-2023-52444DEBIAN-CVE-2023-52444
Published 22-02-2024Last modified 15-10-2026

Vulnerability summary

CVE-2023-52444 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 19
DLA-3840-1DLA-3841-1USN-6688-1USN-6725-1USN-6725-2USN-6726-1

Timeline

  1. 22-02-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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]

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu116 products
  • linux< 4.4.0-257.291 | < 4.15.0-227.239 | < 5.4.0-176.196 | < 5.15.0-102.112
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1134.140 | < 4.4.0-1172.187 | < 4.15.0-1170.183 | < 5.4.0-1122.132 | < 5.15.0-1057.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7e01e7ad746bc8198a8b46163ddc73a1c7d22339, < 02160112e6d45c2610b049df6eb693d7a2e57b46 | ≥ 7e01e7ad746bc8198a8b46163ddc73a1c7d22339, < 5624a3c1b1ebc8991318e1cce2aa719542991024 | ≥ 7e01e7ad746bc8198a8b46163ddc73a1c7d22339, < 6f866885e147d33efc497f1095f35b2ee5ec7310 | ≥ 7e01e7ad746bc8198a8b46163ddc73a1c7d22339, < f100ba617d8be6c98a68f3744ef7617082975b77 | ≥ 7e01e7ad746bc8198a8b46163ddc73a1c7d22339, < f0145860c20be6bae6785c7a2249577674702ac7 | ≥ 7e01e7ad746bc8198a8b46163ddc73a1c7d22339, < d3c0b49aaa12a61d560528f5d605029ab57f0728 | ≥ 7e01e7ad746bc8198a8b46163ddc73a1c7d22339, < 2fb4867f4405aea8c0519d7d188207f232a57862 | ≥ 7e01e7ad746bc8198a8b46163ddc73a1c7d22339, < 53edb549565f55ccd0bdf43be3d66ce4c2d48b28 | 4.2
  • linux_kernel≥ 4.2.0, < 4.19.306 | ≥ 4.20, < 5.4.268 | ≥ 5.5.0, < 5.10.209 | ≥ 5.11.0, < 5.15.148 | ≥ 5.16.0, < 6.1.75 | ≥ 6.2.0, < 6.6.14 | ≥ 6.7.0, < 6.7.2
Debian1 product
  • linux< 6.1.76-1 | < 6.6.15-1

3 vendors · 119 products

References

32 links
Show all 32 references