{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/debian-11-bullseye-kernel/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Debian 11 bullseye kernel"],"_cs_severities":["high"],"_cs_tags":["vulnerability","privilege-escalation","linux","debian"],"_cs_type":"advisory","_cs_vendors":["Debian"],"content_html":"\u003cp\u003eA vulnerability has been identified within the Debian LTS Linux kernel that could allow a malicious actor to escalate privileges and compromise the confidentiality of sensitive data. The vulnerability impacts Debian 11 bullseye systems running kernel versions earlier than 5.10.251-5 and 6.1.172-1~deb11u1. This issue was disclosed in Debian LTS security bulletins msg00032 and msg00035. Successful exploitation of this flaw could grant an attacker elevated control over the affected system, potentially enabling unauthorized access to sensitive information or the execution of arbitrary code. Defenders should promptly apply the provided patches to mitigate this risk. The CVE associated with this vulnerability is CVE-2026-46333.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains initial access to the system via some other means (e.g., exploiting another vulnerability, compromised credentials, or physical access).\u003c/li\u003e\n\u003cli\u003eAttacker identifies the vulnerable Linux kernel version running on the target Debian 11 bullseye system.\u003c/li\u003e\n\u003cli\u003eAttacker leverages CVE-2026-46333 to trigger a privilege escalation vulnerability within the kernel.\u003c/li\u003e\n\u003cli\u003eThe exploit code manipulates kernel memory or data structures, potentially overwriting critical security parameters.\u003c/li\u003e\n\u003cli\u003eUpon successful exploitation, the attacker\u0026rsquo;s process gains elevated privileges, potentially root or administrator level.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages elevated privileges to access sensitive files and data stored on the system.\u003c/li\u003e\n\u003cli\u003eAttacker exfiltrates the compromised data to an external server under their control.\u003c/li\u003e\n\u003cli\u003eAttacker may further compromise other systems on the network, establishing a persistent presence.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability can lead to a complete compromise of the affected Debian 11 bullseye system. This includes unauthorized access to sensitive data, such as user credentials, financial information, or intellectual property. Attackers can also use the compromised system as a launchpad for further attacks against other systems on the network. Due to the potential for privilege escalation, the impact is severe, requiring immediate remediation to prevent significant damage.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security patches provided by Debian LTS as detailed in bulletins msg00032 and msg00035 to remediate the vulnerability.\u003c/li\u003e\n\u003cli\u003eMonitor systems for unusual kernel activity or privilege escalation attempts.\u003c/li\u003e\n\u003cli\u003eDeploy the provided Sigma rule to detect potential exploitation attempts targeting CVE-2026-46333.\u003c/li\u003e\n\u003cli\u003eUpgrade affected Debian 11 systems to kernel versions 5.10.251-5 or 6.1.172-1~deb11u1 or later.\u003c/li\u003e\n\u003cli\u003eReview system logs for indicators of compromise following the exploitation of this vulnerability, referencing the CVE-2026-46333 identifier.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-22T13:05:56Z","date_published":"2026-05-22T13:05:56Z","id":"https://feed.craftedsignal.io/briefs/2026-05-debian-lts-kernel-vuln/","summary":"A vulnerability in the Debian LTS Linux kernel allows attackers to perform privilege escalation and breach data confidentiality, specifically affecting Debian 11 bullseye versions prior to 5.10.251-5 and 6.1.172-1~deb11u1; tracked as CVE-2026-46333.","title":"Debian LTS Linux Kernel Vulnerability Allows Privilege Escalation and Data Breach","url":"https://feed.craftedsignal.io/briefs/2026-05-debian-lts-kernel-vuln/"}],"language":"en","title":"CraftedSignal Threat Feed — Debian 11 Bullseye Kernel","version":"https://jsonfeed.org/version/1.1"}