CVE-2026-53303
f2fs: protect extension_list reading with sb_lock in f2fs_sbi_show()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 26, 2026 |
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Affected Versions
Linux / Linux
b6a06cbbb5f7fd03589cff9178314af04c568826 < d3ff0c121bbaef026df6248ab7ef6f0b068b0647 b6a06cbbb5f7fd03589cff9178314af04c568826 < cea15f66b7b68b2c50943a6660e0692c6635e4eb b6a06cbbb5f7fd03589cff9178314af04c568826 < 4b3a1bf4c2ffd4c9595d900ead78c9035894a025 b6a06cbbb5f7fd03589cff9178314af04c568826 < d0e877810baf613b018fd9747440b9d4d9db1428 b6a06cbbb5f7fd03589cff9178314af04c568826 < ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e b6a06cbbb5f7fd03589cff9178314af04c568826 < 5909bedbed38c558bee7cb6758ceedf9bc3a9194
Linux / Linux
4.17
References
git.kernel.org: https://git.kernel.org/stable/c/d3ff0c121bbaef026df6248ab7ef6f0b068b0647 git.kernel.org: https://git.kernel.org/stable/c/cea15f66b7b68b2c50943a6660e0692c6635e4eb git.kernel.org: https://git.kernel.org/stable/c/4b3a1bf4c2ffd4c9595d900ead78c9035894a025 git.kernel.org: https://git.kernel.org/stable/c/d0e877810baf613b018fd9747440b9d4d9db1428 git.kernel.org: https://git.kernel.org/stable/c/ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92e git.kernel.org: https://git.kernel.org/stable/c/5909bedbed38c558bee7cb6758ceedf9bc3a9194