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TI-2026-04515 Aliases CVE-2026-5172GHSA-57vp-ffx7-7gm6

A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger…

Priority LOW 37Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Partial Red Hat: 2 fixed, 4 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02683 85th percentileScored 2026-11-07
Fix Partial dnsmasq (dnsmasq): 2.92rel2Red Hat: 2 advisoriesRed Hat: 2 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
dnsmasqdnsmasqbefore 2.92rel22.92rel2Patch availableCNA
  • dnsmasq Vendordnsmasq Affected before 2.92rel2 Fixed in 2.92rel2 Patch available CNA

Remediation

  • Fix · CNA dnsmasq (dnsmasq) Fixed in 2.92rel2

Red Hat 2 advisories

  • RHSA-2026:92677 Released 2026-10-29 · Red Hat rating Important
    dnsmasq security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) dnsmasq-2.90-4.el10_0.1
  • RHSA-2026:19158 Released 2026-05-19 · Red Hat rating Important
    dnsmasq security update
    • Red Hat Enterprise Linux AppStream (v. 10) dnsmasq-2.90-7.el10_2, dnsmasq-utils-2.90-7.el10_2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    dnsmasq 2.92rel2

    6 records Highest priority Priority MEDIUM 2 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-04261 A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote…Priority MEDIUM 50
    • TI-2026-04263 A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq…Priority MEDIUM 40
    • TI-2026-04264 An information disclosure vulnerability in dnsmasq allows remote attackers to bypass…Priority LOW 34
    Show all 6 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 9AffectedNo fix planned: Will not fix
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:19158
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:92677
Not affected: 3 products
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0)
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5172
  2. 2026-10-03 Alias added: GHSA-57vp-ffx7-7gm6
  3. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · Red Hat
  4. 2026-10-30 Fix available: RHSA-2026:92677 · Red Hat

References

Other 6

  • TI-2020-19262 dnsmasq-utils 2.79-1 - 'dhcp_release' Denial of Service CVSS 4.0MEDIUM 6.9
  • TI-2026-04261 A Denial of Service (DoS) vulnerability in the DNSSEC validation of dnsmasq allows remote… CVSS 3.1HIGH 7.5
  • TI-2026-04263 A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq… CVSS 3.1HIGH 8.4
  • TI-2026-04264 An information disclosure vulnerability in dnsmasq allows remote attackers to bypass… CVSS 3.1MEDIUM 5.3
  • TI-2026-04262 A heap-based out-of-bounds read vulnerability in the DNSSEC validation of dnsmasq allows… CVSS 3.1MEDIUM 5.3
  • TI-2026-01936 dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing… CVSS 3.1HIGH 7.3
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences