CVE - CVE-2024-26878

CVE-ID
CVE-2024-26878	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25 URL:https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25 MISC:https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5 URL:https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5 MISC:https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0 URL:https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0 MISC:https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0 URL:https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0 MISC:https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877 URL:https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877 MISC:https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754 URL:https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754 MISC:https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1 URL:https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1 MISC:https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f URL:https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f MISC:https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7 URL:https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7
Assigning CNA
kernel.org
Date Record Created
20240219	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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