VulnSocial

CVE-2026-115449

LOWCVSS 3.5 · LOW

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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 IP address to be leaked to the guest in the echo reply, breaking the NAT isolation that user-mode networking is expected to provide.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-200

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Deep dive

Full discourse1 post
  • Mr Low-Level (0x3xp)@0xmrlowlevel

    CVE-2026-115449 - Libslirp ICMP echo reply length desynchronization (Information Disclosure) https://access.redhat.com/security/cve/CVE-2026-115449 https://www.cve.org/CVERecord?id=CVE-2026-115449 https://nvd.nist.gov/vuln/detail/CVE-2026-115449 #cve #redhat #security https://t.co/ZStVCE2xbn

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