- 7.3HighCVSS base score
- 0.61%Exploitation in 30 daysEPSS · top 50% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.
Timeline
ID reserved
By certcc
- 3 months later
· 3 months later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| NVDNVD · Awaiting Analysis | 3.1 | High7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
- EPSS (exploitation in 30 days)
- 0.61% · top 50% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.
Affected products
References
References8
- https://www.suse.com/security/cve/CVE-2026-2291.html (opens in a new tab)
- https://www.kb.cert.org/vuls/id/471747 (opens in a new tab)
- https://thekelleys.org.uk/dnsmasq/CVE/ (opens in a new tab)
- https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html (opens in a new tab)
- https://github.com/NixOS/nixpkgs/pull/519082 (opens in a new tab)
- https://github.com/NixOS/nixpkgs/pull/519093 (opens in a new tab)
- https://github.com/pi-hole/FTL/releases/tag/v6.6.2 (opens in a new tab)
- http://www.openwall.com/lists/oss-security/2026/07/20/14 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-29091 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-2291)Record last updated .