In the Linux kernel, the following vulnerability has been resolved:
fsverity: reject FS_IOC_ENABLE_VERITY on mode 3 fds
Commit 56124d6c87fd ("fsverity: support enabling with tree block size <
PAGE_SIZE") changed FS_IOC_ENABLE_VERITY to use __kernel_read() to read
the file's data, instead of direct pagecache accesses.
An unintended consequence of this is that the
'WARN_ON_ONCE(!(file->f_mode & FMODE_READ))' in __kernel_read() became
reachable by fuzz tests. This happens if FS_IOC_ENABLE_VERITY is called
on a fd opened with access mode 3, which means "ioctl access only".
Arguably, FS_IOC_ENABLE_VERITY should work on ioctl-only fds. But
ioctl-only fds are a weird Linux extension that is rarely used and that
few people even know about. (The documentation for FS_IOC_ENABLE_VERITY
even specifically says it requires O_RDONLY.) It's probably not
worthwhile to make the ioctl internally open a new fd just to handle
this case. Thus, just reject the ioctl on such fds for now.
References
Configurations
History
02 Dec 2025, 19:09
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:6.3:*:*:*:*:*:*:* | |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | NVD-CWE-noinfo | |
| References | () https://git.kernel.org/stable/c/04839139213cf60d4c5fc792214a08830e294ff8 - Patch | |
| References | () https://git.kernel.org/stable/c/85c039cff3c359967cafe90443c02321e950b216 - Patch |
Information
Published : 2025-09-15 14:15
Updated : 2025-12-02 19:09
NVD link : CVE-2023-53172
Mitre link : CVE-2023-53172
CVE.ORG link : CVE-2023-53172
JSON object : View
Products Affected
linux
- linux_kernel
CWE