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7.8 High

CVE-2024-26773 In the Linux kernel, the following vulnerability has been resolved: ext4: avoid allocating blocks from corrupted group…

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

Affected products and versions

Product Affected versions Fixed in
Linux 6.8 earliest → < 6.8 6.8
Linux 6.7 earliest → < 6.7.7 6.7.7
Linux 6.6 earliest → < 6.6.19 6.6.19
Linux 6.1 earliest → < 6.1.80 6.1.80
Linux 5.15 earliest → < 5.15.150 5.15.150
Linux 5.10 earliest → < 5.10.211 5.10.211
Linux 5.4 earliest → < 5.4.270 5.4.270
Linux 4.19 earliest → < 4.19.308 4.19.308
Linux 3.12 No fix stated
Show the 6 other branches
Product Affected versions Fixed in
RUGGEDCOM RST2428P Versions not published
SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Versions not published
SCALANCE XCM-/XRM-/XCH-/XRH-300 family Versions not published
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.0 → < 3.1.5 3.1.5
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 3.1.0 → < 3.1.5 3.1.5
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.0 → < 3.1.5 3.1.5

References

Timeline

  1. Published
  2. Last modified

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