5.5

CVE-2024-50191: ext4: don't set SB_RDONLY after filesystem errors

Modified
AliasesUBUNTU-CVE-2024-50191DEBIAN-CVE-2024-50191
Published 08-11-2024Last modified 11-05-2026

Vulnerability summary

CVE-2024-50191 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.6% 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 (CVE.org)
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 23 · Related 23
DLA-4008-1OPENSUSE-SU-2024:14500-1OPENSUSE-SU-2025:14705-1RHSA-2025:6966USN-7166-1USN-7166-2

Timeline

  1. 08-11-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: don't set SB_RDONLY after filesystem errors When the filesystem is mounted with errors=remount-ro, we were setting SB_RDONLY flag to stop all filesystem modifications. We knew this misses proper locking (sb->s_umount) and does not go through proper filesystem remount procedure but it has been the way this worked since early ext2 days and it was good enough for catastrophic situation damage mitigation. Recently, syzbot has found a way (see link) to trigger warnings in filesystem freezing because the code got confused by SB_RDONLY changing under its hands. Since these days we set EXT4_FLAGS_SHUTDOWN on the superblock which is enough to stop all filesystem modifications, modifying SB_RDONLY shouldn't be needed. So stop doing that.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

11%

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

No weakness data has been published for this record.

Affected systems

Version check

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

Ubuntu122 products
  • linux< 5.15.0-127.137 | < 6.8.0-56.58
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1073.79 | < 6.8.0-1025.27
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 95257987a6387f02970eda707e55a06cce734e18, < 58c0648e4c773f5b54f0cb63bc8c7c6bf52719a9 | ≥ 95257987a6387f02970eda707e55a06cce734e18, < ee77c388469116565e009eaa704a60bc78489e09 | ≥ 95257987a6387f02970eda707e55a06cce734e18, < d3476f3dad4ad68ae5f6b008ea6591d1520da5d8 | 6.6
  • linux_kernel< 5.15.168 | ≥ 5.16, < 6.1.113 | ≥ 6.2, < 6.6.57 | ≥ 6.7, < 6.11.4
Debian1 product
  • linux< 6.11.4-1

3 vendors · 125 products

References

31 links
Show all 31 references