# CVE-2024-0775: Kernel: use-after-free while changing the mount option in __ext4_remount leading

Status: published. Published: 2024-01-22. Updated: 2026-11-05.

A use-after-free flaw was found in the __ext4_remount in fs/ext4/super.c in ext4 in the Linux kernel. This flaw allows a local user to cause an information leak problem while freeing the old quota file names before a potential failure, leading to a use-after-free.

## Remediation

- workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. (source: CNA: redhat)

## Affected products and versions

- Linux / kernel (kernel): ≥ 0; < 4.14.315 (affected, semver); ≥ 4.15; < 4.19.283 (affected, semver); ≥ 4.20; < 5.4.243 (affected, semver); ≥ 5.5; < 5.10.180 (affected, semver); ≥ 5.11; < 5.15.112 (affected, semver); ≥ 5.16; < 6.1.29 (affected, semver); ≥ 6.2; < 6.2.16 (affected, semver); ≥ 6.3; < 6.3.3 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (kernel): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (kernel): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (kernel-rt): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (kernel): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (kernel-rt): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (kernel): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (kernel-rt): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 6.7 (medium); CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-04; percentile 13.26%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-416

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2024-0775 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2259414 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://scm.linefinity.com/common/linux-stable/commit/4c0b4818b1f636bc96359f7817a2d8bab6370162 (CNA: redhat)

- https://access.redhat.com/security/cve/CVE-2024-0775 (ADP: CVE; vdb-entry, x_refsource_REDHAT, x_transferred)

- https://bugzilla.redhat.com/show_bug.cgi?id=2259414 (ADP: CVE; issue-tracking, x_refsource_REDHAT, x_transferred)

- https://scm.linefinity.com/common/linux-stable/commit/4c0b4818b1f636bc96359f7817a2d8bab6370162 (ADP: CVE; x_transferred)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2024-0775; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-0775; retrieved 2026-11-05; source updated Not reported

Revision: a399a89ee05ebcfbcb8bce99eed14ac7f7b468f922d58039cc3281ff9d71fa99

Canonical: https://y2.dev/cve/CVE-2024-0775

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