CVE-2024-26773
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…
Does this matter?
Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.
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
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.31% probability · 24th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0184747b552d6b5a14db3b7fcc3b792ce64dedd1Patch
- https://git.kernel.org/stable/c/21f8cfe79f776287459343e9cfa6055af61328eaPatch
- https://git.kernel.org/stable/c/260fc96283c0f594de18a1b045faf6d8fb42874dPatch
- https://git.kernel.org/stable/c/4530b3660d396a646aad91a787b6ab37cf604b53Patch
- https://git.kernel.org/stable/c/4c21fa60a6f4606f6214a38f50612b17b2f738f5Patch
- https://git.kernel.org/stable/c/927794a02169778c9c2e7b25c768ab3ea8c1dc03Patch
- https://git.kernel.org/stable/c/a2576ae9a35c078e488f2c573e9e6821d651fbbePatch
- https://git.kernel.org/stable/c/f97e75fa4e12b0aa0224e83fcbda8853ac2adf36Patch
- https://git.kernel.org/stable/c/0184747b552d6b5a14db3b7fcc3b792ce64dedd1Patch
- https://git.kernel.org/stable/c/21f8cfe79f776287459343e9cfa6055af61328eaPatch
- https://git.kernel.org/stable/c/260fc96283c0f594de18a1b045faf6d8fb42874dPatch
- https://git.kernel.org/stable/c/4530b3660d396a646aad91a787b6ab37cf604b53Patch
- https://git.kernel.org/stable/c/4c21fa60a6f4606f6214a38f50612b17b2f738f5Patch
- https://git.kernel.org/stable/c/927794a02169778c9c2e7b25c768ab3ea8c1dc03Patch
- https://git.kernel.org/stable/c/a2576ae9a35c078e488f2c573e9e6821d651fbbePatch
- https://git.kernel.org/stable/c/f97e75fa4e12b0aa0224e83fcbda8853ac2adf36Patch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.