CVE-2024-26878

Advisory lineage Upstream: 0 Downstream: 40
Modified
Published: 17 Apr 2024, 10:27
Last modified:12 May 2026, 11:49

Vulnerability Summary

Overall Risk (default)
low
19/100
CVSS Score
4.7 MEDIUM
v3.1 (nvd)
EPSS Score
<0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

17 Apr 2024, 10:27
Published
Vulnerability first disclosed
12 May 2026, 11:49
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 0%

Techniques & Countermeasures

  • CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • debian•debian_linux

    10.0

  • linux•linux

    ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < 8514899c1a4edf802f03c408db901063aa3f05a1 | ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < 49669f8e7eb053f91d239df7b1bfb4500255a9d0 | ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < 61380537aa6dd32d8a723d98b8f1bd1b11d8fee0 | ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < 1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25 | ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < 7f9e833fc0f9b47be503af012eb5903086939754 | ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < 40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5 | ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < f2649d98aa9ca8623149b3cb8df00c944f5655c7 | ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < 6afc9f4434fa8063aa768c2bf5bf98583aee0877 | ≥ 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac, < d0aa72604fbd80c8aabb46eda00535ed35570f1f | 4.14

  • linux•linux_kernel

    < 4.19.311 | ≥ 4.20, < 5.4.273 | ≥ 5.5, < 5.10.214 | ≥ 5.11, < 5.15.153 | ≥ 5.16, < 6.1.83 | ≥ 6.2, < 6.6.23 | ≥ 6.7, < 6.7.11 | ≥ 6.8, < 6.8.2

References (13)