PT-2026-51917 · Linux · Linux

Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-53023

NVD

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.

Related Identifiers

CVE-2026-53023

Affected Products

Linux

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-53023 · Security Note
• https://git.kernel.org/stable/c/bc7a0c34c4ca259cfddf3bc18fc5b3c6411d26ed · Note
• https://git.kernel.org/stable/c/32b0686369e0afbb3549a0d93e2d8517da84cd30 · Note
• https://git.kernel.org/stable/c/5cd0707b81cb4589f00aec5c4c1288bd0980d2a4 · Note
• https://git.kernel.org/stable/c/54d564b762389679e2f8fb9eeb20af7e82371e1c · Note
• https://git.kernel.org/stable/c/a6cd43fe9b083fa23fe1595666d5738856cb261a · Note
• https://git.kernel.org/stable/c/0b11fcbe80a59acdf58337d80ebb5f72201d73d6 · Note
• https://git.kernel.org/stable/c/6136bbb054f7ab9f51ae99915541633b18bcef90 · Note