CVE-2026-77206
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
IKEv2 pre-authentication Null Pointer Dereference in EAP code
Libreswan's IKEv2 state machine has a null pointer dereference bug in the EAP handling code for authentication. As a result of inconsistency within the IKEv2 state machine code, this bug can be triggered by any IKEv2 connection, even if EAP is not configured at all. The error is caused by a fall-through where it incorrectly dereferences ike->sa.st_eap which is NULL. A malicious IKE_AUTH packet can trigger this bug, meaning the peer does not need to be authenticated. The bug results in a crash and restart of the pluto daemon. No remote code execution is possible. Continued exploitation can cause a denial of service.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
libreswan
- Vendor
- The Libreswan Project
- Product
- libreswan
- Platforms
- Unknown
- Default status
unaffected- Package
- libreswan
- Package collection
- https://github.com/libreswan/libreswan
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.7 | affected | semver | Unavailable | 5.3.2 | None listed |
| 5.4 | affected | semver | Unavailable | 5.4 | None listed |
| 5.3.3 | unaffected | semver | Unavailable | Unavailable | None listed |
| 5.4.1 | unaffected | semver | Unavailable | Unavailable | None listed |