5.5

CVE-2023-53091: ext4: update s_journal_inum if it changes after journal replay

Analyzed
AliasesUBUNTU-CVE-2023-53091DEBIAN-CVE-2023-53091
Published 02-05-2025Last modified 23-05-2026

Vulnerability summary

CVE-2023-53091 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.21%
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 5 · Related 5
SUSE-SU-2025:01918-1SUSE-SU-2025:01966-1SUSE-SU-2025:02173-1SUSE-SU-2025:02262-1SUSE-SU-2025:02334-1

Timeline

  1. 02-05-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: update s_journal_inum if it changes after journal replay When mounting a crafted ext4 image, s_journal_inum may change after journal replay, which is obviously unreasonable because we have successfully loaded and replayed the journal through the old s_journal_inum. And the new s_journal_inum bypasses some of the checks in ext4_get_journal(), which may trigger a null pointer dereference problem. So if s_journal_inum changes after the journal replay, we ignore the change, and rewrite the current journal_inum to the superblock.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.21% 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.

Ubuntu117 products
  • linuxAll versions (No fix recorded) | < 5.15.0-79.86
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1042.47
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 345c0dbf3a30872d9b204db96b5857cd00808cae, < 499fef2030fb754c68b1c7cb3a799a3bc1d0d925 | ≥ 345c0dbf3a30872d9b204db96b5857cd00808cae, < 70e66bdeae4d0f7c8e87762f425b68aedd5e8955 | ≥ 345c0dbf3a30872d9b204db96b5857cd00808cae, < ee0c5277d4fab920bd31345c49e193ecede9ecef | ≥ 345c0dbf3a30872d9b204db96b5857cd00808cae, < 3039d8b8692408438a618fac2776b629852663c3 | 51890201da4d654f6ca131bc45a0e892bb10de1d | 7eff961ca9f364be255d279346517ba0158ec8e3 | a9855260fe8d8680bf8c4f0d8303b696c861e99b | 795762468125a6412c089651e74f780bee154118 | 2fd4629de51974002f4e9cf1a35a1926dd6c9d99 | ≥ 3.16.85, < 3.17 | ≥ 4.4.221, < 4.5 | ≥ 4.9.221, < 4.10 | ≥ 4.14.178, < 4.15 | ≥ 4.19.73, < 4.20 | 5.2
  • linux_kernel< 5.15.104 | ≥ 5.16, < 6.1.21 | ≥ 6.2, < 6.2.8
Debian1 product
  • linux< 6.1.25-1

3 vendors · 120 products

References

8 links