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CVE-2025-40778VulnerabilityPublished Updated

Red Hat Security Advisory: bind security update

Affects Red Hat bindSource GCVE Database

0

Mentioned vulnerabilities

Authoritative record:CVE-2025-40778· High 8.6

Not known to be exploited · CVSS 8.6 High.

Data as of 26 Oct 2026, 09:15 UTC

CVSS 3.1 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Oct 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubisc/bindpkg:github/isc/bindOther threatsAffected
  • >=9.11.0 <=9.16.50
  • 9.18.0 <=9.18.39
  • 9.20.0 <=9.20.13
  • 9.21.0 <=9.21.12
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released security updates for BIND in Red Hat Enterprise Linux 9.2 that address these vulnerabilities. Users should apply the updates as described in Red Hat Advisory RHSA-2025:21887 and the referenced article https://access.redhat.com/articles/11258. Applying these official patches fully mitigates the vulnerabilities.

Description

Two security vulnerabilities in the Berkeley Internet Name Domain (BIND) implementation on Red Hat Enterprise Linux 9.2 have been addressed. These include cache poisoning attacks via unsolicited resource records (CVE-2025-40778) and cache poisoning due to a weak pseudo-random number generator (CVE-2025-40780). The vulnerabilities could allow an attacker to poison DNS caches, potentially impacting the integrity of DNS resolution. Red Hat has released security updates to fix these issues in BIND for Red Hat Enterprise Linux 9.2.

References

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