{"apiVersion":"1.0","identifier":"CVE-2026-80545","description":"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.","publishedAt":"2026-08-26T15:17:08","lastModifiedAt":"2026-08-27T06:17:35","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80545","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00136,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-80545","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-80545","en":"https://www.redsauce.net/en/cves/CVE-2026-80545","fr":"https://www.redsauce.net/fr/cves/CVE-2026-80545","pt":"https://www.redsauce.net/pt/cves/CVE-2026-80545","de":"https://www.redsauce.net/de/cves/CVE-2026-80545","sk":"https://www.redsauce.net/sk/cves/CVE-2026-80545","el":"https://www.redsauce.net/el/cves/CVE-2026-80545"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-80545"}}