CVE-2026-53303

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb6a06cbbb5f7fd03589cff9178314af04c568826 < d3ff0c121bbaef026df6248ab7ef6f0b068b0647affected
LinuxLinuxb6a06cbbb5f7fd03589cff9178314af04c568826 < cea15f66b7b68b2c50943a6660e0692c6635e4ebaffected
LinuxLinuxb6a06cbbb5f7fd03589cff9178314af04c568826 < 4b3a1bf4c2ffd4c9595d900ead78c9035894a025affected
LinuxLinuxb6a06cbbb5f7fd03589cff9178314af04c568826 < d0e877810baf613b018fd9747440b9d4d9db1428affected
LinuxLinuxb6a06cbbb5f7fd03589cff9178314af04c568826 < ea3ab43a1f3cf2c7cecd75c8be1ee99a5e94a92eaffected
LinuxLinuxb6a06cbbb5f7fd03589cff9178314af04c568826 < 5909bedbed38c558bee7cb6758ceedf9bc3a9194affected
LinuxLinux4.17affected
LinuxLinux0 < 4.17unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References