CVE-2026-53303

Description

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.

References

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