Bug 2570332 (CVE-2026-41221)

Summary: CVE-2026-41221 slimbootloader: Intel Slim Bootloader: privilege escalation via integer overflow in UEFI firmware
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Intel Slim Bootloader. An integer overflow vulnerability in the Unified Extensible Firmware Interface (UEFI) firmware allows an unauthenticated attacker with physical access to the device to escalate privileges. By triggering this flaw during system startup, an attacker can execute unauthorized operations and gain high-level control over the underlying platform.
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Description OSIDB Bzimport 2026-11-10 19:51:34 UTC 
Integer overflow in the UEFI firmware for the Intel(R) Slim Bootloader within Ring 0: Bare Metal OS may allow an escalation of privilege. Startup code and smm adversary with an unauthenticated user combined with a low complexity attack may enable escalation of privilege. This result may potentially occur via physical access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (high) impacts.