CVE-2023-5369: copy_file_range insufficient capability rights check

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-04 · updated 2026-06-17
Weakness: CWE-273

Description

Before correction, the copy_file_range system call checked only for the CAP_READ and CAP_WRITE capabilities on the input and output file descriptors, respectively. Using an offset is logically equivalent to seeking, and the system call must additionally require the CAP_SEEK capability. This incorrect privilege check enabled sandboxed processes with only read or write but no seek capability on a file descriptor to read data from or write data to an arbitrary location within the file corresponding to that file descriptor.

Affected products

FreeBSD: 13.2

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-23:13.capsicum.asc
https://security.netapp.com/advisory/ntap-20231124-0009/
https://security.FreeBSD.org/advisories/FreeBSD-SA-23:13.capsicum.asc
https://security.netapp.com/advisory/ntap-20231124-0009/

Get alerted when CVE-2023-5369 or the next vulnerability affects your stack