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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–

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AI-suggested

A security update is available from Red Hat that fixes these vulnerabilities. Users should apply the update for BIND on Red Hat Enterprise Linux 9 versions >=9.0.0 and <9.6.2 as soon as possible after applying all previously released errata. Refer to the Red Hat advisory RHSA-2025:19951 for detailed update instructions. No additional mitigations are specified beyond applying the official patch.

Description

Red Hat has issued an important security update for BIND, the DNS server software, addressing vulnerabilities that allow cache poisoning and spoofing attacks. The update fixes a weak pseudo-random number generator (PRNG) issue and various spoofing attack vectors. The advisory affects Red Hat Enterprise Linux 9 versions from 9.0.0 up to but not including 9.6.2 and related variants. The update mitigates risks associated with DNS cache poisoning and spoofing by improving randomness and validation in BIND.

References

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