CVE-2024-26878: quota: Fix potential NULL pointer dereference
First published: Wed Apr 17 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.19.311 | 4.19.311 |
| redhat/kernel | <5.4.273 | 5.4.273 |
| redhat/kernel | <5.10.214 | 5.10.214 |
| redhat/kernel | <5.15.153 | 5.15.153 |
| redhat/kernel | <6.1.83 | 6.1.83 |
| redhat/kernel | <6.6.23 | 6.6.23 |
| redhat/kernel | <6.7.11 | 6.7.11 |
| redhat/kernel | <6.8.2 | 6.8.2 |
| redhat/kernel | <6.9 | 6.9 |
| Linux Kernel | <4.19.311 | |
| Linux Kernel | >=4.20<5.4.273 | |
| Linux Kernel | >=5.5<5.10.214 | |
| Linux Kernel | >=5.11<5.15.153 | |
| Linux Kernel | >=5.16<6.1.83 | |
| Linux Kernel | >=6.2<6.6.23 | |
| Linux Kernel | >=6.7<6.7.11 | |
| Linux Kernel | >=6.8<6.8.2 | |
| Debian Linux | =10.0 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.21-1 | |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 |
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Reference Links
- 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
- https://launchpad.net/bugs/cve/CVE-2024-26878
- https://access.redhat.com/security/cve/CVE-2024-26878
- https://lore.kernel.org/linux-cve-announce/2024041740-CVE-2024-26878-5748@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2275695
- https://access.redhat.com/errata/RHSA-2024:5102
- https://access.redhat.com/errata/RHSA-2024:5101
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2275694
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26878
- https://nvd.nist.gov/vuln/detail/CVE-2024-26878
- https://security-tracker.debian.org/tracker/CVE-2024-26878
- https://ubuntu.com/security/CVE-2024-26878
- https://git.kernel.org/linus/d0aa72604fbd80c8aabb46eda00535ed35570f1f
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2024-26878?
CVE-2024-26878 has been classified with a medium severity due to a potential NULL pointer dereference in the Linux kernel.
How do I fix CVE-2024-26878?
To fix CVE-2024-26878, update your kernel to version 4.19.311, 5.4.273, 5.10.214, 5.15.153, 6.1.83, or later versions.
What versions of the Linux kernel are affected by CVE-2024-26878?
CVE-2024-26878 affects multiple versions of the Linux kernel prior to 4.19.311, 5.4.273, 5.10.214, 5.15.153, 6.1.83, and others.
Is CVE-2024-26878 specific to any Linux distributions?
CVE-2024-26878 primarily affects the Red Hat and Debian distributions of the Linux kernel.
What type of vulnerability is CVE-2024-26878?
CVE-2024-26878 is a programming vulnerability related to race conditions that can lead to undefined behavior and system crashes.
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