Bug 2570757 (CVE-2026-35500)

Summary: CVE-2026-35500 slimbootloader: slimbootloader: Privilege escalation via stack-based buffer overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security <prodsec-ir-bot>
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 slimbootloader. A stack-based buffer overflow in the UEFI (Unified Extensible Firmware Interface) firmware allows an unauthenticated attacker with physical access to trigger memory corruption during startup. An attacker can exploit this flaw to escalate privileges, compromising the confidentiality, integrity, and availability of the system.
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Description OSIDB Bzimport 2026-11-10 20:20:00 UTC 
Stack-based buffer 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.