PT-2026-26340 · Wolfssl · Wolfssl

Wind Wong · Published 2026-01-01 · Updated 2026-04-30 · CVE-2026-3580

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions wolfSSL version 5.8.4

Description The software contains a flaw in the constant-time masking logic within the sp 256 get entry 256 9 function. When compiled with GCC targeting RISC-V RV32I using the -O3 optimization flag, the logic is altered into conditional branches. This change compromises the side-channel resistance of Elliptic Curve Cryptography (ECC) scalar multiplication, potentially enabling a local attacker to retrieve secret keys through timing analysis.

Recommendations Avoid compiling wolfSSL version 5.8.4 with GCC targeting RISC-V RV32I using the -O3 optimization flag.

Fix

Side Channel Attack

Weakness Enumeration

CWE-203

Related Identifiers

CVE-2026-3580

Affected Products

Wolfssl

References · 10

• https://security-tracker.debian.org/tracker/CVE-2026-3580 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-3580 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-3580 · Security Note
• https://ubuntu.com/security/CVE-2026-3580 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-3580 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-3580 · Vendor Advisory
• https://github.com/wolfSSL/wolfssl/pull/9855 · Note
• https://twitter.com/cyberbivash/status/2034731781962781172 · Twitter Post
• https://twitter.com/CVEnew/status/2036024183139037284 · Twitter Post
• https://t.me/msrcreports/4074 · Telegram Post