Vulnerability · Published Jul 3, 2026 · Assigned by curl
CVE-2026-8925SASL double-free
Critical 9.8
In plain English
A critical-severity double free in curl from curl. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)1.1%top 34.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
The curl logic that works with SASL authentication could end up cleaning up the GSASL context *twice* without clearing the pointer in between, making it `free()` the same pointer twice.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | curl | 8.22.0-r0 | ALPINE-CVE-2026-8925 |
| Alpine:v3.24 | curl | 8.21.0-r0 | ALPINE-CVE-2026-8925 |
| Debian:14 | curl | 8.21.0~rc2-1 | DEBIAN-CVE-2026-8925 |
| Ubuntu:22.04:LTS | curl | 7.81.0-1ubuntu1.25 | UBUNTU-CVE-2026-8925 |
| Ubuntu:24.04:LTS | curl | 8.5.0-2ubuntu10.10 | UBUNTU-CVE-2026-8925 |
| Ubuntu:25.10 | curl | 8.14.1-2ubuntu1.4 | UBUNTU-CVE-2026-8925 |
| Ubuntu:26.04:LTS | curl | 8.18.0-1ubuntu2.2 | UBUNTU-CVE-2026-8925 |
Affected products (as reported)
Weakness: CWE-415 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H