{"id":11951,"date":"2026-09-04T18:53:59","date_gmt":"2026-09-04T10:53:59","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80546"},"modified":"2026-09-04T18:53:59","modified_gmt":"2026-09-04T10:53:59","slug":"cve-2026-80546","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80546","title":{"rendered":"CVE-2026-80546 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ns390\/zcrypt: Improve"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>s390\/zcrypt: Improve CCA CPRB length and overflow checks<\/p>\n<p>The xcrb_msg_to_type6cprb_msgx() function lacks proper input<br \/>\nvalidation, creating security vulnerabilities:<br \/>\n1. Integer overflow after CEIL4 alignment: Signed int variables could<br \/>\n   overflow during 4-byte boundary alignment, causing undersized<br \/>\n   buffer allocations or incorrect bounds checking.<br \/>\n2. Missing minimum size validation: The CPRBX structure is copied from<br \/>\n   userspace without verifying sufficient buffer length. Undersized<br \/>\n   buffers cause uninitialized memory access when reading structure<br \/>\n   fields like cprbx.cprb_len and cprbx.domain.<br \/>\n3. Arithmetic overflow in sum calculations: Adding control block and<br \/>\n   data block sizes could overflow, bypassing size checks and enabling<br \/>\n   buffer overflows.<\/p>\n<p>Fix by using size_t for length calculations, adding U32_MAX boundary<br \/>\nchecks after alignment, validating minimum control block size before<br \/>\ncopying from userspace, and detecting sum calculation overflows.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>s390\/zcrypt: Improve CCA CPRB length and overflow checks<\/p>\n<p>The xcrb_msg_to_type6cprb_msgx() function lacks proper input<br \/>\nvalidation, <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-11951","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/11951","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}