CVE-2024-26878

Published Apr 17, 2024

Last updated a year ago

CVSS medium 4.7

Overview

Description
In the Linux kernel, the following vulnerability has been resolved: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered. So let's fix it by using a temporary pointer to avoid this issue.
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Analyzed
Products
linux_kernel, debian_linux

Risk scores

CVSS 3.1

Type
Primary
Base score
4.7
Impact score
3.6
Exploitability score
1
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Severity
MEDIUM

Weaknesses

nvd@nist.gov
CWE-362

Social media

Hype score
Not currently trending

  1. URGENT: Critical kernel security patch released for #RockyLinux (RLSA-2025:18298). Patches CVE-2024-26914 (privilege escalation) & CVE-2024-26878 (DoS). Read more: 👉 https://t.co/LcBXFAATLW #Security https://t.co/2pDrNgTo2F

    @Cezar_H_Linux

    27 Oct 2025

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  2. 🚨 Critical Linux kernel vulnerabilities patched in #Ubuntu (USN-7715-1). Affects CVE-2024-26921, CVE-2024-26878, and others. Read more: 👉 https://t.co/6JD2s8sTZN #Security https://t.co/ltOmO2CWXJ

    @Cezar_H_Linux

    27 Aug 2025

    102 Impressions

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Configurations

Related CVEs

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References

Sources include official advisories and independent security research.