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CVE-2025-20053 is an improper buffer restrictions vulnerability in firmware for certain Intel Xeon processors when Intel Software Guard Extensions (SGX) is enabled. Intel describes the issue as improper buffer restrictions / improper buffer management in firmware routines interacting with SGX features, resulting in insufficient enforcement of buffer boundaries. This can permit memory operations outside the intended buffer bounds. According to Intel advisory INTEL-SA-01313, a privileged local user may exploit the flaw to potentially enable escalation of privilege via local access. Affected platforms include some Intel Xeon processor families identified by Intel, including affected combinations of 4th Gen and 5th Gen Intel Xeon Scalable processors, Intel Xeon 6 processor family products, and Intel Xeon 6 processors with E-cores, where SGX-enabled configurations are in scope.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A local vulnerability in Intel Xeon processor firmware (per INTEL-SA-01313) impacting certain HPE SimpliVity servers, potentially enabling escalation of privilege and/or denial of service.
A high-severity local escalation of privilege vulnerability in Intel Xeon processor firmware with SGX enabled caused by improper buffer restrictions.
A buffer restriction vulnerability in firmware affecting certain Intel Xeon processors with SGX enabled that can allow a privileged local user to escalate privileges.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.