{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cve-2026-31613/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"id":"CVE-2026-31613"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["medium"],"_cs_tags":["cve-2026-31613","smb","out-of-bounds read","vulnerability"],"_cs_type":"advisory","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eCVE-2026-31613 is a security vulnerability affecting the SMB (Server Message Block) client. The vulnerability stems from an out-of-bounds read error that occurs during the parsing of symlink error responses. This can potentially allow a malicious SMB server to send crafted responses that, when processed by the client, lead to reading memory outside of allocated buffers. While the specific details of exploitation are not provided in the source, the nature of an out-of-bounds read can lead to information disclosure or a denial-of-service condition. Microsoft has released a security update to address this vulnerability. Defenders should apply the patch to mitigate the risk.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eA malicious SMB server is set up to serve crafted responses.\u003c/li\u003e\n\u003cli\u003eA client attempts to connect to the malicious SMB server via the SMB protocol.\u003c/li\u003e\n\u003cli\u003eThe server sends a crafted SMB response containing a symlink error.\u003c/li\u003e\n\u003cli\u003eThe client attempts to parse the symlink error response.\u003c/li\u003e\n\u003cli\u003eDue to the vulnerability, the client reads data beyond the allocated buffer.\u003c/li\u003e\n\u003cli\u003eThe out-of-bounds read could result in information disclosure, where sensitive data is exposed, or cause a denial-of-service.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the disclosed information for further exploitation (if information disclosure occurs).\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-31613 could lead to information disclosure, potentially exposing sensitive data from the affected system\u0026rsquo;s memory. Alternatively, the vulnerability could be exploited to trigger a denial-of-service condition, disrupting the availability of the SMB client. The scope of impact depends on the specific data accessible via the out-of-bounds read and the system\u0026rsquo;s role within the network.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security update provided by Microsoft to patch CVE-2026-31613 on all systems using the SMB client to prevent potential out-of-bounds reads.\u003c/li\u003e\n\u003cli\u003eEnable SMB logging to monitor for unusual SMB responses or error conditions that may indicate exploitation attempts.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-22T12:00:00Z","date_published":"2024-01-22T12:00:00Z","id":"/briefs/2024-01-cve-2026-31613-smb-oob-read/","summary":"CVE-2026-31613 is an out-of-bounds read vulnerability in the SMB client when parsing symlink error responses, requiring patching to prevent potential information disclosure or denial-of-service.","title":"CVE-2026-31613 SMB Client Out-of-Bounds Read Vulnerability","url":"https://feed.craftedsignal.io/briefs/2024-01-cve-2026-31613-smb-oob-read/"}],"language":"en","title":"CraftedSignal Threat Feed — Cve-2026-31613","version":"https://jsonfeed.org/version/1.1"}