{"id":"CVE-2026-80709","title":"s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs","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","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 4589f742718d0256ea6dd1f5a78be6e689bdb8aa","Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < b505dcc8307d64468b463dfad45a03bf865c637e","Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15","Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 672b12940e3f1336dfed5287412a71500adf2a76","Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 1223477ca88e2396eca440919d0ca8754df79bd5","Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 983279d7f86ade73db86f886e09172dd567031b5","Linux 5.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:20:33.288089Z"},"published":"2026-08-28","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:26:34.515Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80709","references":[{"url":"https://git.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aa"},{"url":"https://git.kernel.org/stable/c/b505dcc8307d64468b463dfad45a03bf865c637e"},{"url":"https://git.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15"},{"url":"https://git.kernel.org/stable/c/672b12940e3f1336dfed5287412a71500adf2a76"},{"url":"https://git.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5"},{"url":"https://git.kernel.org/stable/c/983279d7f86ade73db86f886e09172dd567031b5"}],"tags":["cve.org"],"epss":0.00176,"epssPercentile":0.06647,"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## Affected\n\n- `Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 4589f742718d0256ea6dd1f5a78be6e689bdb8aa`\n- `Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < b505dcc8307d64468b463dfad45a03bf865c637e`\n- `Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15`\n- `Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 672b12940e3f1336dfed5287412a71500adf2a76`\n- `Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 1223477ca88e2396eca440919d0ca8754df79bd5`\n- `Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 983279d7f86ade73db86f886e09172dd567031b5`\n- `Linux 5.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}