DEBIAN-CVE-2026-8674

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Source
https://security-tracker.debian.org/tracker/CVE-2026-8674
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8674.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-8674
Upstream
Published
2026-09-17T17:16:53Z
Modified
2026-09-18T05:01:00Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Initializing the DNS stub resolver from an /etc/resolv.conf file, or a LOCALDOMAIN environment variable, whose search list contains a domain of roughly 200 characters or more in the GNU C Library version 2.26 to 2.44 results in an assertion failure which aborts the process. The resolver truncates the search list when copying it into the fixed-size _res.defdname buffer, then asserts that the copy is consistent with the full configuration. The consistency check compared against the wrong size and did not handle a first entry that does not fit, so a correctly truncated list failed the assertion. Any process that resolves names through the library is affected, including long-running processes that reload /etc/resolv.conf on the next query after it changes. Search domains are commonly written to /etc/resolv.conf from data received over DHCP or from a VPN server, so an attacker on the local network may be able to trigger this without privileges on the target system, subject to validation by the network configuration software.

References

Affected packages

Debian:12 / glibc

Package

Name
glibc
Purl
pkg:deb/debian/glibc?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.36-9
2.36-9+deb12u1
2.36-9+deb12u2
2.36-9+deb12u3
2.36-9+deb12u4
2.36-9+deb12u5
2.36-9+deb12u6
2.36-9+deb12u7
2.36-9+deb12u8
2.36-9+deb12u9
2.36-9+deb12u10
2.36-9+deb12u11
2.36-9+deb12u12
2.36-9+deb12u13
2.36-9+deb12u14
2.36-9+loong64
2.36-10~0
2.37-1
2.37-2
2.37-3
2.37-4
2.37-5
2.37-6
2.37-7
2.37-8
2.37-9
2.37-10
2.37-11
2.37-12
2.37-13
2.37-14
2.37-15~deb13u1
2.37-15
2.37-15.1
2.37-15.1+sh4
2.37-16
2.37-17
2.37-18
2.37-19
2.38-1
2.38-2
2.38-3
2.38-4
2.38-5
2.38-6
2.38-7~0+hurd.1
2.38-7
2.38-8
2.38-9
2.38-10
2.38-11
2.38-12
2.38-12.1
2.38-13
2.38-14
2.38-15~0
2.38-15~1
2.39-1
2.39-2
2.39-3
2.39-3.1
2.39-4
2.39-5
2.39-6
2.39-6+hurd.1
2.39-6+sh4
2.39-7~0
2.39-7
2.39-7+sh4
2.39-8~0
2.40-1
2.40-2
2.40-2+sh4
2.40-3
2.40-3+sh4
2.40-4
2.40-5~hurd.1
2.40-5
2.40-6~1
2.40-6
2.40-7
2.41-1
2.41-2
2.41-3
2.41-4~0
2.41-4
2.41-5~0
2.41-5
2.41-6
2.41-7
2.41-8~0
2.41-8~1
2.41-8
2.41-9~0
2.41-9~1
2.41-9
2.41-10
2.41-11
2.41-12
2.41-13~hurd.0
2.41-13~hurd.1
2.42-1
2.42-2
2.42-3
2.42-4
2.42-5
2.42-6
2.42-7
2.42-8~hurd.1
2.42-8~hurd.2
2.42-8
2.42-9
2.42-10
2.42-11
2.42-12~hurd.1
2.42-12
2.42-13
2.42-14~hurd.1
2.42-14
2.42-15~hurd.1
2.42-15
2.42-16
2.42-17
2.43-1
2.43-2
2.43-3
2.43-3+m68k
2.43-4
2.43-4+m68k
2.43-5
2.44-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8674.json"

Debian:13 / glibc

Package

Name
glibc
Purl
pkg:deb/debian/glibc?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.41-12
2.41-12+deb13u1
2.41-12+deb13u2
2.41-12+deb13u3
2.41-12+deb13u4
2.41-13~hurd.0
2.41-13~hurd.1
2.42-1
2.42-2
2.42-3
2.42-4
2.42-5
2.42-6
2.42-7
2.42-8~hurd.1
2.42-8~hurd.2
2.42-8
2.42-9
2.42-10
2.42-11
2.42-12~hurd.1
2.42-12
2.42-13
2.42-14~hurd.1
2.42-14
2.42-15~hurd.1
2.42-15
2.42-16
2.42-17
2.43-1
2.43-2
2.43-3
2.43-3+m68k
2.43-4
2.43-4+m68k
2.43-5
2.44-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8674.json"

Debian:14 / glibc

Package

Name
glibc
Purl
pkg:deb/debian/glibc?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.41-12
2.41-13~hurd.0
2.41-13~hurd.1
2.42-1
2.42-2
2.42-3
2.42-4
2.42-5
2.42-6
2.42-7
2.42-8~hurd.1
2.42-8~hurd.2
2.42-8
2.42-9
2.42-10
2.42-11
2.42-12~hurd.1
2.42-12
2.42-13
2.42-14~hurd.1
2.42-14
2.42-15~hurd.1
2.42-15
2.42-16
2.42-17
2.43-1
2.43-2
2.43-3
2.43-3+m68k
2.43-4
2.43-4+m68k
2.43-5
2.44-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-8674.json"