4.3

CVE-2025-11932: Timing Side-Channel in PSK Binder Verification

Analyzed
AliasesUBUNTU-CVE-2025-11932DEBIAN-CVE-2025-11932ALPINE-CVE-2025-11932
Published 21-11-2025Last modified 08-12-2025

Vulnerability summary

CVE-2025-11932 is a medium (CVSS 4.3) Observable Discrepancy vulnerability in wolfssl. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.27%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 21-11-2025
    PublishedVulnerability first disclosed.
  2. 08-12-2025
    Last modifiedVulnerability information updated.

Description

The server previously verified the TLS 1.3 PSK binder using a non-constant time method which could potentially leak information about the PSK binder

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.26% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • wolfssl< 5.9.1-r0 | < 5.8.4-r0
Debian1 product
  • wolfsslAll versions (No fix recorded)
Ubuntu1 product
  • wolfsslAll versions (No fix recorded)
Wolfssl1 product

4 vendors · 4 products

References

5 links