high · CVSS v3 7.5

CVE-2026-120831

A flaw was found in libslirp in if_output(). When moving a session from the fast queue to the batch queue, the code unli…

Description

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.

Scores

Severity
high
CVSS v2
6.1
CVSS v3
7.5
CVSS v4
—
EPSS
—

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