14 results · Feed
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Medium 6.5
Libslirp: libslirp: queue pointer corruption in if_output() leading to denial of service
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…
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High 7.4
Libslirp: libslirp: out-of-bounds heap read in icmp_forward_error() leading to information disclosure
A flaw was found in libslirp in icmp_forward_error(). When building an ICMP error response, the length of the quoted original IPv4 packet was taken from the IP header without clamping it to the actual buffer length. A truncated or malformed packet could cause…
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Low 3.5
Libslirp: libslirp: icmp echo reply length desynchronization leaks host ip to guest
A flaw was found in libslirp. When handling ICMP echo requests, the reply length is not updated to match the actual data received from the host. Under specific conditions where the normal ICMP socket is unavailable, this length mismatch causes the host's real…
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High 7.4
Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp response builders on small interface mtu
A heap-based buffer overflow was found in the DHCPv6 and TFTP response builders of libslirp. When the host is configured with a small interface MTU, a guest-supplied DHCPv6 CLIENTID option or TFTP blksize option can overflow the reply buffer with attacker-con…
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Medium 6.5CVE-2026-9539 Public exploit
libslirp TCP URG OOB Read Information Leak
An out-of-bounds heap read and integer underflow in the TCP urgent data handling (sosendoob) in freedesktop.org libslirp version before v4.9.2 on hypervisor host environments (e.g., QEMU) allows a privileged guest VM attacker (root or CAP_NET_RAW) to leak gig…
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Unscored —
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in th…
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Unscored —
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in th…
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Unscored —
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in th…
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Unscored —
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in th…
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Unscored —
ncsi.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of header data even i…
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Unscored —
slirp.c in libslirp through 4.3.1 has a buffer over-read because it tries to read a certain amount of header data even …
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Unscored —
An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw oc…
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High 7.5
libslirp: use after free vulnerability cause a denial of service.
A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.
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Unscored —
In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer overflow in la…