AMD SMM OOB Read/Write in TSEG Memory Region
CVE-2024-36343 Published on May 19, 2026
Improper input validation in the System Management Mode (SMM) communications buffer could allow a privileged attacker to perform an out of bounds read or write to a limited section of the Top of Memory Segment (TSEG) memory region, potentially resulting in loss of confidentiality or integrity.
Weakness Type
What is a buffer underrun Vulnerability?
The software writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer. This typically occurs when a pointer or its index is decremented to a position before the buffer, when pointer arithmetic results in a position before the beginning of the valid memory location, or when a negative index is used.
CVE-2024-36343 has been classified to as a buffer underrun vulnerability or weakness.
Affected Versions
AMD EPYC™ 4004:- Version ComboAM5PI 1.1.0.3d is unaffected.
- Version ComboAM5 1.2.0.3j is unaffected.
- Version RembrandtPI-FP7_1.0.0.Bg is unaffected.
- Version PhoenixPI-FP8-FP7_1.2.0.0f is unaffected.
- Version DragonRangeFL1_1.0.0.3l is unaffected.
- Version ComboAM5-PI_1.0.0.e is unaffected.
- Version ComboAM5PI 1.1.0.3g is unaffected.
- Version ComboAM5 1.2.0.3j is unaffected.
- Version FireRangeFL1PI 1.0.0.0f is unaffected.
- Version StrixHaloPI-FP11_1.0.0.2b is unaffected.
- Version StrixKrackanPI-FP8_1.1.0.0f is unaffected.
- Version StrixKrackanPI-FP8_1.1.0.2e is unaffected.
- Version StormPeakPI-SP6 1.1.0.0k is unaffected.
- Version StormPeakPI-SP6 1.0.0.1m is unaffected.
- Version StormPeakPI-SP6_1.1.0.0k is unaffected.
- Version ComboAM5PI 1.1.0.3g is unaffected.
- Version ComboAM5 1.2.0.3j is unaffected.
- Version ComboAM5 1.2.0.3j is unaffected.
- Version ComboAM5 1.2.0.3j is unaffected.
- Version Embedded-PI_FP7r2 100F is unaffected.
- Version EmbeddedAM5PI 1.0.0.5 is unaffected.
- Version EmbeddedPhoenixPI-FP7r2_1.0.0.4 is unaffected.
- Version EmbeddedAM5PI 1.0.0.7 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.