CVE-2024-26773 (GCVE-0-2024-26773)
Vulnerability from cvelistv5
Published
2024-04-03 17:00
Modified
2026-05-11 20:03
Severity ?
Summary
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
Impacted products
Vendor Product Version
Linux Linux Version: 163a203ddb36c36d4a1c942aececda0cc8d06aa7
Version: 163a203ddb36c36d4a1c942aececda0cc8d06aa7
Version: 163a203ddb36c36d4a1c942aececda0cc8d06aa7
Version: 163a203ddb36c36d4a1c942aececda0cc8d06aa7
Version: 163a203ddb36c36d4a1c942aececda0cc8d06aa7
Version: 163a203ddb36c36d4a1c942aececda0cc8d06aa7
Version: 163a203ddb36c36d4a1c942aececda0cc8d06aa7
Version: 163a203ddb36c36d4a1c942aececda0cc8d06aa7
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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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