CVE-2026-80543s390/zcrypt: Pad trailing CCA or EP11 message with zeros
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/zcrypt: Pad trailing CCA or EP11 message with zeros The both functions xcrb_msg_to_type6cprb_msgx() and xcrb_msg_to_type6_ep11cprb_msgx() copy the user space message into a kernel buffer based on the message length. But on further processing the message is supposed to be 4 byte length adjusted. Thus up to 3 bytes of uninitialized kernel memory are forwarded to further processing steps and may unwanted expose kernel memory to the crypto card firmware. This patch contains code to pad the gap between user space copied message and message buffer length sent down to further processing of the CCA or EP11 message to zeros.
- CVSS
- Not yet scored
- 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 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 20b0b0159390fa5c00a435195649680fefda81e0 before 44e61f1834831f873af5a4fec5a5e432b929c6a2; from e2c6d91eb8b1533753755f07803e47eceed263d0 before 2db92a56b000173d332b6c30f38a5a4444e4355a; from e2c6d91eb8b1533753755f07803e47eceed263d0 before eb363254472493e3458156fc11fd56dca92f4333 | CNA record |
References
- https://git.kernel.org/stable/c/44e61f1834831f873af5a4fec5a5e432b929c6a2
- https://git.kernel.org/stable/c/2db92a56b000173d332b6c30f38a5a4444e4355a
- https://git.kernel.org/stable/c/eb363254472493e3458156fc11fd56dca92f4333
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.