CVE-2026-53023
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.
Does this matter?
Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0b11fcbe80a59acdf58337d80ebb5f72201d73d6Patch
- https://git.kernel.org/stable/c/32b0686369e0afbb3549a0d93e2d8517da84cd30Patch
- https://git.kernel.org/stable/c/54d564b762389679e2f8fb9eeb20af7e82371e1cPatch
- https://git.kernel.org/stable/c/5cd0707b81cb4589f00aec5c4c1288bd0980d2a4Patch
- https://git.kernel.org/stable/c/6136bbb054f7ab9f51ae99915541633b18bcef90Patch
- https://git.kernel.org/stable/c/a6cd43fe9b083fa23fe1595666d5738856cb261aPatch
- https://git.kernel.org/stable/c/bc7a0c34c4ca259cfddf3bc18fc5b3c6411d26edPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.