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8.4 High

CVE-2026-4892 A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute…

Description

A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.

Affected products and versions

Product Affected versions Fixed in
dnsmasq 2.92 earliest → < 2.92rel2 2.92rel2
Red Hat Enterprise Linux AppStream (v. 10) Versions not published
Red Hat Enterprise Linux AppStream (v. 8) Versions not published
Red Hat Enterprise Linux AppStream (v. 9) Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat OpenShift Container Platform 4 Versions not published
Red Hat Enterprise Linux AppStream EUS (v.9.6) Versions not published
Red Hat Enterprise Linux 10 Versions not published
Show the 4 other branches
Product Affected versions Fixed in
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat Enterprise Linux 9.6 Extended Update Support Versions not published
Red Hat OpenShift Container Platform 4.19 4.19 earliest → < 4.19.9.6.202607151909-0 4.19.9.6.202607151909-0

References

Timeline

  1. Published
  2. Last modified

Other CVEs of dnsmasq

The 6 CVEs of dnsmasq →
CVE-2026-5172 A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read… 7.3 High CVE-2026-4893 An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS… 5.3 Medium CVE-2026-4891 A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a… 5.3 Medium CVE-2026-4890 A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote attackers to cause a denial of… 7.5 High
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