[UPDATE] [high] dnsmasq: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in dnsmasq to cause a denial-of-service condition, execute arbitrary code with root privileges, disclose confidential information, manipulate data, and redirect users to malicious domains.
CSIRTS triage
- What
- Multiple vulnerabilities can cause denial of service, execute arbitrary code, disclose information, and manipulate data.
- Who is affected
- Deployments of dnsmasq.
- Urgency
- Remediation is urgent due to the high severity and potential for exploitation.
- Action
- Update to the latest version of dnsmasq.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1468
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-22910.75% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all scored CVEs.
- Low exploitation riskCVE-2026-48920.81% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all scored CVEs.
- Moderate exploitation riskCVE-2026-48932.7% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 84% of all scored CVEs.
- Low exploitation riskCVE-2026-51720.93% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 57% of all scored CVEs.
- Moderate exploitation riskCVE-2026-48916.2% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 93% of all scored CVEs.
- Moderate exploitation riskCVE-2026-48907.2% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 94% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-2291 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-4892 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-4893 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-5172 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-4891 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-4890 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for dnsmasq
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- medium[UPDATE] [medium] dnsmasq: Vulnerability allows Denial of Servicecert-bund · 2026-07-07
- medium[UPDATE] [medium] dnsmasq: Vulnerability allows denial of servicecert-bund · 2026-07-07
- mediumCVE-2026-12969: Dnsmasq: dnsmasq: out-of-bounds read in find_soa() due to missing extrabytes validationmsrc · 2026-06-09
- mediumCVE-2026-12725: Dnsmasq: dnsmasq: heap buffer overflow in log_query() when logging unsupported ds/dnskey repli…msrc · 2026-06-09
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