CVE-2024-40969: f2fs: don't set RO when shutting down f2fs

mediumCVSS 5.5CVE-2024-40969

CSIRTS triage

vendor: Linux product: Linux kernel Denial of service

What: F2FS filesystem sets read-only flag incorrectly during shutdown, potentially corrupting filesystem state.
Who is affected: Systems running F2FS filesystem during shutdown or system reboot.
Urgency: Medium severity; non-exploited but can cause data corruption during shutdown sequences.
Action: Apply kernel patch that prevents improper read-only flag setting during F2FS shutdown.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Linux kernel

Get an email when a new Linux kernel advisory drops — max one per day, one-click unsubscribe.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-40969

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2024-409690.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 12% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2024-40969	coverage & exploitation status	NVD · CVE.org

Recent advisories for f2fs

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-68460: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix potential deadlo…nvd · 2026-08-15
unknownCVE-2026-68459: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix potential deadlo…nvd · 2026-08-15
mediumCVE-2022-49742: f2fs: initialize locks earlier in f2fs_fill_super()msrc · 2026-08-06
mediumCVE-2025-38333: f2fs: fix to bail out in get_new_segment()msrc · 2026-08-06
mediumCVE-2026-46175: f2fs: fix fsck inconsistency caused by FGGC of node blockmsrc · 2026-08-06
mediumCVE-2024-49859: f2fs: fix to check atomic_file in f2fs ioctl interfacesmsrc · 2026-08-06