{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","favicon":"https://feed.craftedsignal.io/favicon-32x32.png","feed_url":"https://feed.craftedsignal.io/cpes/cpe2.3afreedesktoplibslirp/feed.json","home_page_url":"https://feed.craftedsignal.io/","icon":"https://feed.craftedsignal.io/apple-touch-icon.png","items":[{"_cs_actors":[],"_cs_cpes":["cpe:2.3:a:freedesktop:libslirp:*:*:*:*:*:*:*:*"],"_cs_cves":[{"cvss":6.5,"id":"CVE-2026-120831"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["libslirp"],"_cs_severities":["low"],"_cs_tags":[],"_cs_type":"advisory","_cs_vendors":["FreeDesktop"],"content_html":"\u003cp\u003eA vulnerability exists in the libslirp library within the \u003ccode\u003eif_output()\u003c/code\u003e function, identified as CVE-2026-120831. An attacker can trigger memory corruption when the library attempts to move a session from the fast queue to the batch queue. By unlinking and reinserting an arbitrary packet via \u003ccode\u003eifm-\u0026gt;m_nextpkt\u003c/code\u003e instead of the session queue head, the library corrupts internal queue pointers.\u003c/p\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation results in a crash of the host networking process, leading to a denial of service for the affected host. This impact is confirmed by the Red Hat bugzilla report.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInventory systems utilizing libslirp, particularly virtual machine hosts or container runtimes relying on this user-mode networking library.\u003c/li\u003e\n\u003cli\u003eReview the provided Red Hat Bugzilla report and Gitlab commit for patch availability or mitigating configuration changes.\u003c/li\u003e\n\u003cli\u003ePrioritize patching for internet-facing or multi-tenant virtualization environments where an adjacent attacker could potentially reach the interface.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-11-03T04:05:06Z","date_published":"2026-11-03T04:05:06Z","id":"https://feed.craftedsignal.io/briefs/2026-11-libslirp-denial-of-service/","summary":"A queue pointer corruption vulnerability in libslirp allows an adjacent attacker to crash the host networking process via burst traffic, leading to a denial of service.","title":"libslirp: Denial of service in if_output (CVE-2026-120831)","url":"https://feed.craftedsignal.io/briefs/2026-11-libslirp-denial-of-service/"}],"language":"en","title":"CraftedSignal Threat Feed - Cpe:2.3:a:freedesktop:libslirp:*:*:*:*:*:*:*:*","version":"https://jsonfeed.org/version/1.1"}