CVE-2026-64559
High
s390/pkey: Check length in PKEY_VERIFYPROTK ioctl
In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in PKEY_VERIFYPROTK ioctl Explicitly check the buffer length request structure provided by user-space and fail, if it exceeds the buffer size.
Exploit probability
0.1%
Published
July 29, 2026
Required by
Not available
Last source change
August 18, 2026
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Open Source Vulnerabilities
CVE-2026-64559
View original source
In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in PKEY_VERIFYPROTK ioctl Explicitly check the buffer length request structure provided by user-space and fail, if it exceeds the buffer size.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/0a9e34ccbe772b8f321388cdbdf4f22b94e513e7
- https://git.kernel.org/stable/c/693bf91d4db134f9b1c2840c8e287eee3d993bac
- https://git.kernel.org/stable/c/7e7e03848c918aa0acad5ffd75d929e3afec1554
- https://git.kernel.org/stable/c/b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64559.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64559