CVE-2025-38333: f2fs: fix to bail out in get_new_segment()

mediumCVSS 5.5CVE-2025-38333

CSIRTS triage

vendor: Linux product: Linux kernelOther

What: The f2fs filesystem fails to bail out properly in get_new_segment() function.
Who is affected: Systems running the Linux kernel with f2fs filesystem in use.
Urgency: Medium severity with CVSS 5.5; not currently exploited but could cause filesystem errors.
Action: Apply Linux kernel patch CVE-2025-38333 when available or update to a patched kernel version.

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

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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-2025-38333

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-2025-383330.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-38333	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-2024-49859: f2fs: fix to check atomic_file in f2fs ioctl interfacesmsrc · 2026-08-06
highCVE-2024-44941: f2fs: fix to cover read extent cache access with lockmsrc · 2026-08-06
mediumCVE-2022-49742: f2fs: initialize locks earlier in f2fs_fill_super()msrc · 2026-08-06
mediumCVE-2024-40969: f2fs: don't set RO when shutting down f2fsmsrc · 2026-08-06