This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-120831 →
Unrated
A flaw was found in libslirp in if_output(). When moving a session from the fast queue to the batch queue, the code unlinked and reinserted an arbitra...
UBUNTU-CVE-2026-120831
First seen on SecPulse
Affected packages
| Package | Affected → Fixed | |
|---|---|---|
| Ubuntu:20.04:LTSlibslirp |
All versions→ Not listed |
Not listed |
| Ubuntu:22.04:LTSlibslirp |
All versions→ Not listed |
Not listed |
| Ubuntu:24.04:LTSlibslirp |
All versions→ Not listed |
Not listed |
| Ubuntu:26.10libslirp |
All versions→ Not listed |
Not listed |
| Ubuntu:26.04:LTSlibslirp |
All versions→ Not listed |
Not listed |
This record does not list fixed versions. Check the article or the vendor advisory in the references for whether and where it is fixed.
Original description The description as published by the source.
A flaw was found in libslirp in if_output(). When moving a session from the fast queue to the batch queue, the code unlinked and reinserted an arbitrary packet via ifm->m_nextpkt instead of the session queue head, corrupting queue pointers. A guest generating burst traffic could crash the host networking process, causing a denial of service.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- report ubuntu.com
- report cve.org
- report access.redhat.com
- report bugzilla.redhat.com
- report gitlab.freedesktop.org