High 7.1Published Jun 26, 2026

CVE-2026-53303f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()

Updated under an hour ago (Oct 28, 2026, 6:23 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show() In f2fs_sbi_show(), the extension_list, extension_count and hot_ext_count are read without holding sbi->sb_lock. If a concurrent sysfs store modifies the extension list via f2fs_update_extension_list(), the show path may read inconsistent count and array contents, potentially leading to out-of-bounds access or displaying stale data. Fix this by holding sb_lock around the entire extension list read and format operation.

CVSS: 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jun 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b6a06cbbb5f7fd03589cff9178314af04c568826 before d3ff0c121bbaef026df6248ab7ef6f0b068b0647; from b6a06cbbb5f7fd03589cff9178314af04c568826 before cea15f66b7b68b2c50943a6660e0692c6635e4eb; from b6a06cbbb5f7fd03589cff9178314af04c568826 before 4b3a1bf4c2ffd4c9595d900ead78c9035894a025; from b6a06cbbb5f7fd03589cff9178314af04c568826 before d0e877810baf613b018fd9747440b9d4d9db1428; from b6a06cbbb5f7fd03589cff9178314af04c568826 before ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e; from b6a06cbbb5f7fd03589cff9178314af04c568826 before 5909bedbed38c558bee7cb6758ceedf9bc3a9194	CNA record
linux linux_kernel linux:linux_kernel	from 4.17 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10	NVD

References

References

https://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647	patch
https://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb	patch
https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025	patch
https://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428	patch
https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e	patch
https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.