CVE-2026-3503: Fault injection attack with ML-DSA and ML-KEM on ARM
Vulnerability summary
CVE-2026-3503 is a medium (CVSS 5.2) vulnerability in wolfssl inc. wolfssl (wolfcrypt). EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5% of scored vulnerabilities.
Not severe (CVSS 4.3, physical access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Timeline
- 19-03-2026PublishedVulnerability first disclosed.
- 19-03-2026Last modifiedVulnerability information updated.
Description
Protection mechanism failure in wolfCrypt post-quantum implementations (ML-KEM and ML-DSA) in wolfSSL on ARM Cortex-M microcontrollers allows a physical attacker to compromise key material and/or cryptographic outcomes via induced transient faults that corrupt or redirect seed/pointer values during Keccak-based expansion. This issue affects wolfSSL (wolfCrypt): commit hash d86575c766e6e67ef93545fa69c04d6eb49400c6.
CVSS metrics
7 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated4.3MediumCVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N/U:Amber
- NVDNIST4.3MediumCVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber
- OSV · UbuntuEcosystem advisory · calculated5.2MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- OSV · DebianEcosystem advisory · calculated5.2MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- OSV · AlpineEcosystem advisory · calculated5.2MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
EPSS trend
Probability
0.16%
Chance of exploitation in the next 30 days
Percentile
5%
Versus all other CVEs
30-day change
Decrease -0.01 pp
From 0.17% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: physical access, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- wolfssl≥ 5.8.2, < 5.9.1-r0 | ≥ 5.8.2, < 5.9.0-r0
Debian1 product
- wolfsslAll versions (No fix recorded)
Ubuntu1 product
- wolfsslAll versions (No fix recorded)
Wolfssl1 product
- wolfssl≥ 5.8.2, < 5.9.0
Wolfssl inc.1 product
- wolfssl (wolfcrypt)≥ 5.8.2, < 5.9.0
5 vendors · 5 products
