CVE-2026-3580 — Observable Discrepancy in Wolfssl

CWE-203 — Observable DiscrepancyCWE-20 — Improper Input Validation8 documents7 sources
Severity
2.1LOWNVD
EPSS
0.0%
top 97.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
WolfsslDebian WolfsslMsrc Azl3 Mariadb 10.11.16-1 ON Azure Linux 3.0+1 more
Timeline
PublishedMar 19

Description

In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transformation breaks the side-channel resistance of ECC scalar multiplication, potentially allowing a local attacker to recover secret keys via timing analysis.

CVSS vector

CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

Affected Packages6 packages

▶debiandebian/wolfssl< wolfssl 5.9.0-0.1 (forky)
▶CVEListV5wolfssl/wolfssl< 5.9.0
▶Debianwolfssl/wolfssl< 5.9.0-0.1
▶NVDwolfssl/wolfssl5.8.4

🔴Vulnerability Details

2
OSV
CVE-2026-3580: In wolfSSL 5↗2026-03-19
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GHSA
GHSA-wm74-pvww-q7h2: In wolfSSL 5↗2026-03-19
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📋Vendor Advisories

2
Microsoft
Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V↗2026-03-10
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Debian
CVE-2026-3580: wolfssl - In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optim...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-3580 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-3580 — Observable Discrepancy in Wolfssl | cvebase