Vulnerability · Published Aug 26, 2026 · Assigned by mitre
CVE-2026-26449
High 7.5
In plain English
A high-severity null pointer dereference in the stomper package (Ubuntu). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 57.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
In Stomper 5e2741e when a client sends a SEND frame missing the destination header field, the server triggers a null pointer dereference (or access to invalid memory) while processing the frame, causing the process to crash.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | stomper | no fix listed | UBUNTU-CVE-2026-26449 |
| Ubuntu:24.04:LTS | stomper | no fix listed | UBUNTU-CVE-2026-26449 |
| Ubuntu:26.04:LTS | stomper | no fix listed | UBUNTU-CVE-2026-26449 |
| Ubuntu:26.10 | stomper | no fix listed | UBUNTU-CVE-2026-26449 |
Affected products (as reported)
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H