CVE-2026-80543

CVE CVE-2026-80543EUVD EUVD-2026-66458Published 2026-08-26T14:37:15.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux e2c6d91eb8b1533753755f07803e47eceed263d0 <2db92a56b000173d332b6c30f38a5a4444e4355a; patch: 7.2; patch: 0; e2c6d91eb8b1533753755f07803e47eceed263d0 <eb363254472493e3458156fc11fd56dca92f4333; patch: 7.1.10; 7.1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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