Executive Summary

Informations
Name CVE-2024-26878 First vendor Publication 2024-04-17
Vendor Cve Last vendor Modification 2024-04-17

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26878

Sources (Detail)

https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25
https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5
https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0
https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0
https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877
https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754
https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1
https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f
https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7
Source Url

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0
Date Informations
2024-04-17 17:28:35
  • First insertion