CVE-2026-53023

Summary

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: terminate the cached volume label after UTF-8 conversion

ntfs_fill_super() loads the on-disk volume label with utf16s_to_utf8s() and stores the result in sbi->volume.label. The converted label is later exposed through ntfs3_label_show() using %s, but utf16s_to_utf8s() only returns the number of bytes written and does not add a trailing NUL.

If the converted label fills the entire fixed buffer, ntfs3_label_show() can read past the end of sbi->volume.label while looking for a terminator.

Terminate the cached label explicitly after a successful conversion and clamp the exact-full case to the last byte of the buffer.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 32b0686369e0afbb3549a0d93e2d8517da84cd30affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < bc7a0c34c4ca259cfddf3bc18fc5b3c6411d26edaffected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 0b11fcbe80a59acdf58337d80ebb5f72201d73d6affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 54d564b762389679e2f8fb9eeb20af7e82371e1caffected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 6136bbb054f7ab9f51ae99915541633b18bcef90affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 5cd0707b81cb4589f00aec5c4c1288bd0980d2a4affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < a6cd43fe9b083fa23fe1595666d5738856cb261aaffected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
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