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CVE-2024-56780— quota: flush quota_release_work upon quota writeback

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于配额系统在冻结文件系统时，未始终刷新quota_release_work队列，可能导致在文件系统冻结状态下尝试启动事务，触发警告，影响文件系统的稳定性和性能。

AI Predicted 3.3 Difficulty: Easy EPSS 0.22% · P12

Possible ATT&CK Techniques 2 AI

T1562 T1499 · Endpoint Denial of Service

Affected Version Matrix 26

VendorProduct Version RangeStatus
Linux Linux d40c192e119892799dd4ddf94f5cea6fa93775ef< a5abba5e0e586e258ded3e798fe5f69c66fec198 affected
86d89987f0998c98f57d641e308b40452a994045< 6f3821acd7c3143145999248087de5fb4b48cf26 affected
89602de9a2d7080b7a4029d5c1bf8f78d295ff5f< ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb affected
3027e200dd58d5b437f16634dbbd355b29ffe0a6< 3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb affected
dabc8b20756601b9e1cc85a81d47d3f98ed4d13a< bcacb52a985f1b6d280f698a470b873dfe52728a affected
dabc8b20756601b9e1cc85a81d47d3f98ed4d13a< 8ea87e34792258825d290f4dc5216276e91cb224 affected
dabc8b20756601b9e1cc85a81d47d3f98ed4d13a< ac6f420291b3fee1113f21d612fa88b628afab5b affected
f3e9a2bbdeb8987508dd6bb2b701dea911d4daec affected
… +18 more rows
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I. Basic Information for CVE-2024-56780

Vulnerability Information
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Vulnerability Title
quota: flush quota_release_work upon quota writeback
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于配额系统在冻结文件系统时，未始终刷新quota_release_work队列，可能导致在文件系统冻结状态下尝试启动事务，触发警告，影响文件系统的稳定性和性能。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux d40c192e119892799dd4ddf94f5cea6fa93775ef ~ a5abba5e0e586e258ded3e798fe5f69c66fec198 -
Linux Linux 6.6 -

II. Public POCs for CVE-2024-56780

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III. Intelligence Information for CVE-2024-56780

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Patches & Fixes for CVE-2024-56780 (7)

Same Patch Batch · Linux · 2025-01-08 · 16 CVEs total

CVE-2024-56779 9.8 CRITICAL nfsd: fix nfs4_openowner leak when concurrent nfsd4_open occur
CVE-2024-56775 7.8 HIGH drm/amd/display: Fix handling of plane refcount
CVE-2024-56784 7.8 HIGH drm/amd/display: Adding array index check to prevent memory corruption
CVE-2024-56770 net/sched: netem: account for backlog updates from child qdisc
CVE-2024-56771 mtd: spinand: winbond: Fix 512GW, 01GW, 01JW and 02JW ECC information
CVE-2024-56773 kunit: Fix potential null dereference in kunit_device_driver_test()
CVE-2024-56772 kunit: string-stream: Fix a UAF bug in kunit_init_suite()
CVE-2024-56774 btrfs: add a sanity check for btrfs root in btrfs_search_slot()
CVE-2024-56776 drm/sti: avoid potential dereference of error pointers
CVE-2024-56777 drm/sti: avoid potential dereference of error pointers in sti_gdp_atomic_check
CVE-2024-56778 drm/sti: avoid potential dereference of error pointers in sti_hqvdp_atomic_check
CVE-2024-56782 ACPI: x86: Add adev NULL check to acpi_quirk_skip_serdev_enumeration()
CVE-2024-56783 netfilter: nft_socket: remove WARN_ON_ONCE on maximum cgroup level
CVE-2024-56785 MIPS: Loongson64: DTS: Really fix PCIe port nodes for ls7a
CVE-2024-56787 soc: imx8m: Probe the SoC driver as platform driver

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56780

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