GHSA-c279-989m-238f
Medium · 6.5Sliver: Nil Pointer Dereference in tunnelCloseHandler causes panic when a reverse tunnel (rportfwd) close is attempted
CVSS
6.5
EPSS
—
Published
Mar 29, 2026
CISA due date
—
The record
A nil pointer dereference in `tunnelCloseHandler` causes the handler goroutine to panic whenever a reverse tunnel (rportfwd) close is attempted. Both the legitimate close path AND the unauthorized close path dereference `tunnel.SessionID` where `tunnel` is guaranteed nil. This means rportfwd tunnels can never be cleanly closed, and any authenticated implant can trigger repeated goroutine panics.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-112405 Pillow is a Python imaging library. CWE-476
- CVE-2026-112392 Pillow is a Python imaging library. CWE-476
- CVE-2026-100348 kin-openapi is a Go project for handling OpenAPI files. CWE-476
- CVE-2026-100349 kin-openapi is a Go project for handling OpenAPI files. CWE-476
- CVE-2026-109280 ImageMagick 7.1.0-20 before 7.1.2-32 contains a use after free vulnerability in the -fx… CWE-476
- CVE-2026-109272 ImageMagick 7.1.1-31 before 7.1.2-32 contains a NULL pointer dereference in the… CWE-476
- CVE-2026-109258 ImageMagick 7.1.0-20 before 7.1.2-32 contains an invalid memory free vulnerability in the… CWE-476
- CVE-2026-107655 A flaw was found in CUPS. CWE-476