{"id":"CVE-2026-80709","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Fix wrong domain value verification with EP11 CPRBs\n\nThere is a wrong upper limit check for the domain value when an EP11\nCPRB is processed for sending to …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Fix wrong domain value verification with EP11 CPRBs\n\nThere is a wrong upper limit check for the domain value when an EP11\nCPRB is processed for sending to …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9"],"published":"2026-08-28","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:18:07.747","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80709","references":[{"url":"https://git.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aa","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/672b12940e3f1336dfed5287412a71500adf2a76","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/983279d7f86ade73db86f886e09172dd567031b5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b505dcc8307d64468b463dfad45a03bf865c637e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80709.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80709"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2525466"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80709"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80709"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082808-CVE-2026-80709-2ca4@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00176,"epssPercentile":0.07048,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:20:33.288089Z"},"scores":{"nvd":7.8,"vendor":5.5,"cna":7.8},"ingestedAt":"2026-10-16T19:46:24.304Z","slug":"CVE-2026-80709","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Fix wrong domain value verification with EP11 CPRBs\n\nThere is a wrong upper limit check for the domain value when an EP11\nCPRB is processed for sending to a crypto card. This check is only\nactive on custom device nodes but may lead to access heap memory\nbehind perms->adm when an administrative CPRB is sent.\nAdd correct limit (AP_DOMAINS = 256) checking to fix this.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80709.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230431,"id":"CVE-2026-80709","ts":1793134643898,"field":"cvss","old":"5.5","new":"7.8"},{"seq":230430,"id":"CVE-2026-80709","ts":1793134643898,"field":"severity","old":"medium","new":"high"},{"seq":224346,"id":"CVE-2026-80709","ts":1792325100721,"field":"cvss","old":"7.8","new":"5.5"},{"seq":224345,"id":"CVE-2026-80709","ts":1792325100721,"field":"severity","old":"high","new":"medium"}]}