CVE-2026-120831 Libslirp: libslirp: queue pointer corruption in if_output() leading to denial of service

A flaw was found in libslirp in ifoutput. When moving a session from the fast queue to the batch queue, the code unlinked and reinserted an arbitrary packet via ifm-mnextpkt instead of the session queue head, corrupting queue pointers. A guest generating burst traffic could crash the host...

CVE-2026-120831 Libslirp: libslirp: queue pointer corruption in if_output() leading to denial of service

A flaw was found in libslirp in ifoutput. When moving a session from the fast queue to the batch queue, the code unlinked and reinserted an arbitrary packet via ifm-mnextpkt instead of the session queue head, corrupting queue pointers. A guest generating burst traffic could crash the host...

CVE-2026-120831

A flaw exists in libslirp within the if_output() function. When a session moves from the fast queue to the batch queue, the code incorrectly unlinks and reinserts an arbitrary packet via ifm->m_nextpkt instead of the session queue head. This leads to queue pointer corruption . A guest generati...