CVSS 3.1
5.5 mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2021-26339
Medium (5.5) in amd. EPSS 0.3% chance of exploitation in the next 30 days.
A bug in AMD CPU’s core logic may allow for an attacker, using specific code from an unprivileged VM, to trigger a CPU core hang resulting in a potential denial of service. AMD believes the specific code includes a specific x86 instruction sequence that would not be generated by compilers.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-31)
- Published
- Modified
- Record from
- the NVD, synced
Affected
- amd:epyc_72f3_firmware
- amd:epyc_7313_firmware
- amd:epyc_7313p_firmware
- amd:epyc_7343_firmware
- amd:epyc_7373x_firmware
- amd:epyc_73f3_firmware
- amd:epyc_7413_firmware
- amd:epyc_7443_firmware
- amd:epyc_7443p_firmware
- amd:epyc_7453_firmware
- amd:epyc_7473x_firmware
- amd:epyc_74f3_firmware
- amd:epyc_7513_firmware
- amd:epyc_7543_firmware
- amd:epyc_7543p_firmware
- amd:epyc_7573x_firmware
- amd:epyc_75f3_firmware
- amd:epyc_7643_firmware
- amd:epyc_7663_firmware
- amd:epyc_7713_firmware
- amd:epyc_7713p_firmware
- amd:epyc_7763_firmware
- amd:epyc_7773x_firmware
- amd:ryzen_3_2200u_firmware
- amd:ryzen_3_2300u_firmware
- amd:ryzen_3_3100_firmware
- amd:ryzen_3_3300g_firmware
- amd:ryzen_3_3300x_firmware
- amd:ryzen_3_4300g_firmware
- amd:ryzen_3_4300ge_firmware
- amd:ryzen_3_5125c_firmware
- amd:ryzen_3_5300g_firmware
- amd:ryzen_3_5300ge_firmware
- amd:ryzen_3_5400u_firmware
- amd:ryzen_3_5425c_firmware
- amd:ryzen_3_5425u_firmware
- amd:ryzen_3_pro_2300u_firmware
- amd:ryzen_3_pro_3300u_firmware
- amd:ryzen_5_2500u_firmware
- amd:ryzen_5_2600h_firmware
- amd:ryzen_5_3400g_firmware
- amd:ryzen_5_3450g_firmware
- amd:ryzen_5_3600_firmware
- amd:ryzen_5_3600x_firmware
- amd:ryzen_5_4600g_firmware
- amd:ryzen_5_4600ge_firmware
- amd:ryzen_5_5560u_firmware
- amd:ryzen_5_5600h_firmware
- amd:ryzen_5_5600hs_firmware
- amd:ryzen_5_5600u_firmware