CVE-2024-26773 (GCVE-0-2024-26773)

Vulnerability from cvelistv5 – Published: 2024-04-03 17:00 – Updated: 2026-05-11 20:03
VLAI?
Title
ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 21f8cfe79f776287459343e9cfa6055af61328ea (git)
Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 260fc96283c0f594de18a1b045faf6d8fb42874d (git)
Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 927794a02169778c9c2e7b25c768ab3ea8c1dc03 (git)
Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 4c21fa60a6f4606f6214a38f50612b17b2f738f5 (git)
Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < f97e75fa4e12b0aa0224e83fcbda8853ac2adf36 (git)
Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 0184747b552d6b5a14db3b7fcc3b792ce64dedd1 (git)
Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < a2576ae9a35c078e488f2c573e9e6821d651fbbe (git)
Affected: 163a203ddb36c36d4a1c942aececda0cc8d06aa7 , < 4530b3660d396a646aad91a787b6ab37cf604b53 (git)
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    Linux Linux Affected: 3.12
Unaffected: 0 , < 3.12 (semver)
Unaffected: 4.19.308 , ≤ 4.19.* (semver)
Unaffected: 5.4.270 , ≤ 5.4.* (semver)
Unaffected: 5.10.211 , ≤ 5.10.* (semver)
Unaffected: 5.15.150 , ≤ 5.15.* (semver)
Unaffected: 6.1.80 , ≤ 6.1.* (semver)
Unaffected: 6.6.19 , ≤ 6.6.* (semver)
Unaffected: 6.7.7 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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