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VulnerabilityPublished Updated

CVE-2025-40778: Important · bind security update

Affects bind-docSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2025-40778· High 8.6

Not known to be exploited · CVSS 8.6 High : upgrade to 32:9.18.33-4.el10_0.2 soon.

Data as of 7 Nov 2026, 17:19 UTC

CVSS 3.1 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 32:9.18.33-4.el10_0.2
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. Weaponized: 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 7 Nov 2026.

What to do

Upgrade the AlmaLinux to 32:9.18.33-4.el10_0.2.

Affected software

ProductAffectedFixed in
AlmaLinux 10bind-docAffected
  • <32:9.18.33-4.el10_0.2
Fixed in
  • 32:9.18.33-4.el10_0.2
AlmaLinux 10bind-licenseAffected
  • <32:9.18.33-4.el10_0.2
Fixed in
  • 32:9.18.33-4.el10_0.2

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

AI-suggested

A security update is available and should be applied promptly. Red Hat has released fixed packages for Red Hat Enterprise Linux 10, specifically version 9.18.33-4.el10_0.2 and later. Administrators should follow the instructions in the Red Hat advisory RHSA-2025:19912 to update affected systems. No additional mitigation steps are indicated beyond applying the official patch.

Description

BIND, a widely used DNS implementation, has a security update addressing multiple vulnerabilities including cache poisoning via unsolicited resource records (CVE-2025-40778), cache poisoning due to a weak pseudo-random number generator (CVE-2025-40780), and resource exhaustion through malformed DNSKEY handling (CVE-2025-8677). These issues could allow attackers to poison DNS caches or cause denial of service. The update fixes these vulnerabilities in Red Hat Enterprise Linux 10 and related distributions.

References

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