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CVE-2026-95508— Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp response builders on small interface mtu

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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-cont

CVSS 7.4 · High EPSS 0.42% · P36

Affected Version Matrix 6

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
any affected
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I. Basic Information for CVE-2026-95508

Vulnerability Information

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Vulnerability Title
Libslirp: libslirp: heap buffer overflow in dhcpv6/tftp response builders on small interface mtu
Source: CVE Program / CVE List V5
Vulnerability Description
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-controlled content and length, resulting in denial of service and potentially arbitrary code execution in the host process. The default interface MTU is not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-95508

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III. Intelligence Information for CVE-2026-95508

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Vendor Advisories for CVE-2026-95508 (2)

Same Patch Batch · Red Hat · 2026-09-22 · 6 CVEs total

CVE-2026-13087 8.8 HIGH Kernel: heap out-of-bounds write in the linux kernel rpc-over-rdma server reply path...
CVE-2026-95619 7.7 HIGH Gcc: libstdc++ integer overflow in `new` operator
CVE-2026-94640 7.5 HIGH Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated
CVE-2026-95503 6.8 MEDIUM Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password
CVE-2026-90462 5.4 MEDIUM Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-787

V. Comments for CVE-2026-95508

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