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Fencer Intel
high 8.2

CVE-2021-26365 json

Certain size values in firmware binary headers could trigger out of bounds reads during signature validation, leading to denial of service…

published 3y ago modified 4mo ago also EUVD-2021-13171

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

Certain size values in firmware binary headers could trigger out of bounds reads during signature validation, leading to denial of service or potentially limited leakage of information about out-of-bounds memory contents.

Patch / fix

  • amd ryzen_3_3200u_firmware picassopi-fp5_1.0.0.d
  • amd ryzen_3_3250c_firmware picassopi-fp5_1.0.0.d
  • amd ryzen_3_3250u_firmware picassopi-fp5_1.0.0.d
  • amd amd_3015e_firmware pollockpi-ft5_1.0.0.3
  • amd amd_3015ce_firmware pollockpi-ft5_1.0.0.3
  • amd ryzen_7_5700u_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_5_5500u_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_3_5300u_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_7_5700g_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_7_5700ge_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_5_5600g_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_5_5600ge_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_3_5300g_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_3_5300ge_firmware cezannepi-fp6_1.0.0.8
  • amd ryzen_9_6980hx_firmware rmb_1.0.0.4
  • amd ryzen_9_6980hs_firmware rmb_1.0.0.4
  • amd ryzen_9_6900hx_firmware rmb_1.0.0.4
  • amd ryzen_9_6900hs_firmware rmb_1.0.0.4
  • amd ryzen_7_6800h_firmware rmb_1.0.0.4
  • amd ryzen_7_6800hs_firmware rmb_1.0.0.4

Is CVE-2021-26365 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
NVD 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Affected products

  • AMD Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4
  • AMD Ryzen™ 5000 Series Desktop processor with Radeon™ Graphics “Cezanne” AM4
  • AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP
  • AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”
  • AMD Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5
  • AMD Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”
  • AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics “Renoir”
  • AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics “Lucienne”
  • AMD Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Cezanne”
  • AMD Ryzen™ 6000 Series Mobile Processors "Rembrandt"

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.