CVE-2026-64558s390/pkey: Check length in pkey_pckmo handler implementation
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Check length in pkey_pckmo handler implementation Explicitly check the length of the target buffer in the pkey_pckmo implementation of the key_to_protkey() handler function. The handler function fails, if the generated output data exceeds the length of the provided target buffer.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 8fcc231ce3bea12b78bb94b280cdc03cff342435 before 02028a24e26d85262ab9c8fc4344e1f3503007fc; from 8fcc231ce3bea12b78bb94b280cdc03cff342435 before 433e5e70cdc1edf382d28d08a885b22e2b98b7da; from 8fcc231ce3bea12b78bb94b280cdc03cff342435 before 614aa0491c7a190556c2345dddee0b6f5ed90989; 8fcc231ce3bea12b78bb94b280cdc03cff342435 builds before 1ac287e2af9a9112fe271427ef45eceb26bce8b4 | CNA record |
References
- https://git.kernel.org/stable/c/02028a24e26d85262ab9c8fc4344e1f3503007fc
- https://git.kernel.org/stable/c/433e5e70cdc1edf382d28d08a885b22e2b98b7da
- https://git.kernel.org/stable/c/614aa0491c7a190556c2345dddee0b6f5ed90989
- https://git.kernel.org/stable/c/1ac287e2af9a9112fe271427ef45eceb26bce8b4
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.