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Fencer Intel
medium 5.9

CVE-2026-42002 json

Concurrency and locking defects in GSS-TSIG

published 5mo ago modified 3mo ago also EUVD-2026-31260

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits
0
none known

Summary

Concurrency and locking defects in GSS-TSIG

Patch / fix

  • PowerDNS Authoritative 4.9.15, 5.0.5
  • pdns Debian 13 4.9.15-0+deb13u1
  • pdns Debian 14 5.0.5-1

debian advisories DEBIAN-CVE-2026-42002

  • pdns Alpine 3.24, Alpine 3.23 5.0.5-r0

alpine advisories ALPINE-CVE-2026-42002

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-42002 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-42002 updated cvss 5.9

pdns-recursor: pdns-recursor: Denial of service via GSS-TSIG concurrency and locking defects

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5mo ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • PowerDNS Authoritative

Classification

Weakness
  • CWE-364 Signal Handler Race Condition

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.