{"id":79420,"date":"2026-06-07T15:38:59","date_gmt":"2026-06-07T12:08:59","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-49494-comodo-internet-security-inspect-sys-ipv6-integer-underflow-remote-denial-of-service\/"},"modified":"2026-06-07T15:38:59","modified_gmt":"2026-06-07T12:08:59","slug":"cve-2026-49494-comodo-internet-security-inspect-sys-ipv6-integer-underflow-remote-denial-of-service","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-49494-comodo-internet-security-inspect-sys-ipv6-integer-underflow-remote-denial-of-service\/","title":{"rendered":"CVE-2026-49494 &#8211; Comodo Internet Security Inspect.sys IPv6 Integer Underflow Remote Denial of Service"},"content":{"rendered":"<p>CVE ID :CVE-2026-49494<\/p>\n<p>  Published : June 7, 2026, 12:08 p.m. | 24\u00a0minutes ago<\/p>\n<p>  Description :Comodo Internet Security&#8217;s firewall driver Inspect.sys contains an integer underflow in its IPv6 packet parser. The parser decrements an unsigned 64-bit payload-length value (taken from the IPv6 fixed header&#8217;s payload length field) by the size of each IPv6 extension header without validating it, so a packet whose declared payload length is smaller than the sum of its extension-header lengths underflows the value to a near-maximal 64-bit integer. Because IPv6 parsing occurs before firewall rule enforcement, a remote, unauthenticated attacker can send a single crafted IPv6 packet &#8211; even to a host with all ports blocked &#8211; to trigger an out-of-bounds read (and, on a separate code path, an oversized memcpy) in the Windows kernel at DISPATCH_LEVEL, crashing the system (BSOD).<\/p>\n<p>  Severity: 8.7 | HIGH<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-49494 Published : June 7, 2026, 12:08 p.m. | 24\u00a0minutes ago Description :Comodo Internet Security&#8217;s firewall driver Inspect.sys contains an integer underflow in its IPv6 packet parser. The parser decrements an unsigned 64-bit payload-length value (taken from the IPv6 fixed header&#8217;s payload length field) by the size of each IPv6 extension header without &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-79420","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/79420","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=79420"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/79420\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=79420"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=79420"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=79420"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}