CVE-2026-120830 libslirp - Information Disclosure

libslirp contains an out-of-bounds read caused by improper length handling in icmp_forward_error() when building ICMP error responses, letting attackers leak host memory via malformed IPv4 packets, exploit requires sending crafted packets.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Information Disclosure
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Published
3 November 2026
Updated
3 November 2026
Weakness
CWE-125

Vendor fix

Update libslirp to the latest version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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