CVE-2024-56780

MEDIUM EPSS 10.8%
Published Jan 8, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 8, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: quota: flush quota_release_work upon quota writeback One of the paths quota writeback is called from is: freeze_super() sync_filesystem() ext4_sync_fs() dquot_writeback_dquots() Since we currently don't always flush the quota_release_work queue in this path, we can end up with the following race: 1. dquot are added to releasing_dquots list during regular operations. 2. FS Freeze starts, however, this does not flush the quota_release_work queue. 3. Freeze completes. 4. Kernel eventually tries to flush the workqueue while FS is frozen which hits a WARN_ON since transaction gets started during frozen state: ext4_journal_check_start+0x28/0x110 [ext4] (unreliable) __ext4_journal_start_sb+0x64/0x1c0 [ext4] ext4_release_dquot+0x90/0x1d0 [ext4] quota_release_workfn+0x43c/0x4d0 Which is the following line: WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE); Which ultimately results in generic/390 failing due to dmesg noise. This was detected on powerpc machine 15 cores. To avoid this, make sure to flush the workqueue during dquot_writeback_dquots() so we dont have any pending workitems after freeze.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
10.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.19.295  –  <4.20
linuxlinux_kernel*≥5.4.257  –  <5.4.287
linuxlinux_kernel*≥5.10.195  –  <5.10.231
linuxlinux_kernel*≥5.15.132  –  <5.15.174
linuxlinux_kernel*≥6.1.53  –  <6.1.120
linuxlinux_kernel*≥6.4.16  –  <6.5
linuxlinux_kernel*≥6.5.3  –  <6.6.64
linuxlinux_kernel*≥6.7  –  <6.12.4
linuxlinux_kernel6.13any

References 9

  • git.kernel.org https://git.kernel.org/stable/c/3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6f3821acd7c3143145999248087de5fb4b48cf26
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8ea87e34792258825d290f4dc5216276e91cb224
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a5abba5e0e586e258ded3e798fe5f69c66fec198
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac6f420291b3fee1113f21d612fa88b628afab5b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bcacb52a985f1b6d280f698a470b873dfe52728a
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6f3821acd7c3143145999248087de5fb4b48cf26
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8ea87e34792258825d290f4dc5216276e91cb224
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a5abba5e0e586e258ded3e798fe5f69c66fec198
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ac6f420291b3fee1113f21d612fa88b628afab5b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bcacb52a985f1b6d280f698a470b873dfe52728a
    Patch