Improper Handling of Values Affecting kernel-debug package, versions <0:4.18.0-477.67.1.el8_8
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUG-7686079
- published 14 Aug 2024
- disclosed 3 Apr 2024
Introduced: 3 Apr 2024
CVE-2024-26773 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug to version 0:4.18.0-477.67.1.el8_8 or higher.
This issue was patched in RHSA-2024:5255.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()
Determine if the group block bitmap is corrupted before using ac_b_ex in ext4_mb_try_best_found() to avoid allocating blocks from a group with a corrupted block bitmap in the following concurrency and making the situation worse.
ext4_mb_regular_allocator ext4_lock_group(sb, group) ext4_mb_good_group // check if the group bbitmap is corrupted ext4_mb_complex_scan_group // Scan group gets ac_b_ex but doesn't use it ext4_unlock_group(sb, group) ext4_mark_group_bitmap_corrupted(group) // The block bitmap was corrupted during // the group unlock gap. ext4_mb_try_best_found ext4_lock_group(ac->ac_sb, group) ext4_mb_use_best_found mb_mark_used // Allocating blocks in block bitmap corrupted group
References
- https://access.redhat.com/security/cve/CVE-2024-26773
- https://git.kernel.org/stable/c/0184747b552d6b5a14db3b7fcc3b792ce64dedd1
- https://git.kernel.org/stable/c/21f8cfe79f776287459343e9cfa6055af61328ea
- https://git.kernel.org/stable/c/260fc96283c0f594de18a1b045faf6d8fb42874d
- https://git.kernel.org/stable/c/4530b3660d396a646aad91a787b6ab37cf604b53
- https://git.kernel.org/stable/c/4c21fa60a6f4606f6214a38f50612b17b2f738f5
- https://git.kernel.org/stable/c/927794a02169778c9c2e7b25c768ab3ea8c1dc03
- https://git.kernel.org/stable/c/a2576ae9a35c078e488f2c573e9e6821d651fbbe
- https://git.kernel.org/stable/c/f97e75fa4e12b0aa0224e83fcbda8853ac2adf36
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html