7.5

CVE-2026-77692: isc bind 9 NULL Pointer Dereference

CVSS: 7.5v3.1HighAwaiting analysis
AliasesALPINE-CVE-2026-77692UBUNTU-CVE-2026-77692DEBIAN-CVE-2026-77692
Published 16-09-2026Last modified 17-09-2026
Open JSON

Vulnerability summary

CVE-2026-77692 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in isc bind 9. EPSS estimates a 6.56% chance of exploitation in the next 30 days, higher than 93.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
6.56%
0%100%
Low · +6.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 5
MGASA-2026-0422OPENSUSE-SU-2026:11916-1OPENSUSE-SU-2026:22049-1RHSA-2026:68279SUSE-SU-2026:24157-1SUSE-SU-2026:4285-1

Timeline

  1. 16-09-2026
    PublishedVulnerability first disclosed.
  2. 17-09-2026
    Last modifiedVulnerability information updated.

Description

An attacker can cause `named` to abort by sending a crafted DNS-over-HTTPS request with a cryptographically invalid SIG(0) record, and then closing the transport connection prematurely. This issue affects BIND 9 versions 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, and 9.20.9-S1 through 9.20.27-S1.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

6.56%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

+6.08 pp

From 0.48% on 20-09-2026

20-09-202620-10-2026
EPSS score
6.56%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard7 products
  • bindAll versions (No fix recorded)
  • bind-devAll versions (No fix recorded)
  • bind-dnssec-rootAll versions (No fix recorded)
  • bind-dnssec-tools< 9.20.29-r1 | All versions (No fix recorded)
  • bind-libs< 9.20.29-r1 | All versions (No fix recorded)
Wolfi7 products
  • bindAll versions (No fix recorded)
  • bind-devAll versions (No fix recorded)
  • bind-dnssec-rootAll versions (No fix recorded)
  • bind-dnssec-tools< 9.20.29-r1 | All versions (No fix recorded)
  • bind-libs< 9.20.29-r1 | All versions (No fix recorded)
Ubuntu3 products
  • bind9All versions (No fix recorded) | < 1:9.20.24-1ubuntu0.4
  • bind9-libsAll versions (No fix recorded)
  • isc-dhcpAll versions (No fix recorded)
Alpine1 product
  • bind< 9.20.29-r0
Debian1 product
  • bind9All versions (No fix recorded) | < 1:9.20.29-1~deb13u1 | < 1:9.20.29-1
Isc1 product
  • bind 9≥ 9.20.0, ≤ 9.20.27 | ≥ 9.21.0, ≤ 9.21.25 | ≥ 9.20.9-S1, ≤ 9.20.27-S1

6 vendors · 20 products

References

8 links