CVE-2026-80545

CVE CVE-2026-80545EUVD EUVD-2026-66460Published 2026-08-26T14:37:16.000ZLast changed 2026-08-27T05:01:32.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Improve EP11 CPRB length and overflow checks The xcrb_msg_to_type6_ep11cprb_msgx() function lacks proper input validation, creating security vulnerabilities: 1. Missing minimum size validation: The ep11_cprb structure and subsequent payload fields (pld_tag, pld_lenfmt) are copied from userspace without verifying sufficient buffer length. 2. Arithmetic overflow in length calculations: CEIL4 alignment could overflow, bypassing size checks and enabling buffer overflows. 3. The payload is asn1 encoded but the function just uses a simple c struct overlay to access some fields of the payload. Fix by using size_t for length calculations, adding U32_MAX boundary checks after alignment, and validating minimum request size and minimum reply size before copying from userspace. Do a very simple asn1 parsing of the payload up to the function value field.

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 7.1; patch: 7.1.10; patch: 7.2; e2c6d91eb8b1533753755f07803e47eceed263d0 <17ac0bc866fc624cd05f022dcd8b730c0af11bb1; e2c6d91eb8b1533753755f07803e47eceed263d0 <2976b9d2e716c7e5487ca7c29a7bd076cf9adf08; patch: 0

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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