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CVE-2024-26773 Detail

Description

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


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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Hyperlink Resource
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

Weakness Enumeration

CWE-ID CWE Name Source

Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-26773
NVD Published Date:
04/03/2024
NVD Last Modified:
11/05/2024
Source:
kernel.org