UBUNTU-CVE-2026-8674
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.
UBUNTU-CVE-2026-8674
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:UBUNTU-CVE-2026-8674
eglibc
Source reference: /affected/0/package/name
- Affected versions
- 2.17-93ubuntu4
Source reference:
/affected/0/versions2.18-0ubuntu1Source reference:
/affected/0/versions2.18-0ubuntu2Source reference:
/affected/0/versions2.18-0ubuntu4Source reference:
/affected/0/versions2.18-0ubuntu5Source reference:
/affected/0/versions2.18-0ubuntu6Source reference:
/affected/0/versions2.18-0ubuntu7Source reference:
/affected/0/versions2.19-0ubuntu2Source reference:
/affected/0/versions2.19-0ubuntu3Source reference:
/affected/0/versions2.19-0ubuntu4Source reference:
/affected/0/versions2.19-0ubuntu5Source reference:
/affected/0/versions2.19-0ubuntu6Source reference:
/affected/0/versions2.19-0ubuntu6.1Source reference:
/affected/0/versions2.19-0ubuntu6.3Source reference:
/affected/0/versions2.19-0ubuntu6.4Source reference:
/affected/0/versions2.19-0ubuntu6.5Source reference:
/affected/0/versions2.19-0ubuntu6.6Source reference:
/affected/0/versions2.19-0ubuntu6.7Source reference:
/affected/0/versions2.19-0ubuntu6.8Source reference:
/affected/0/versions2.19-0ubuntu6.9Source reference:
/affected/0/versions2.19-0ubuntu6.10Source reference:
/affected/0/versions2.19-0ubuntu6.11Source reference:
/affected/0/versions2.19-0ubuntu6.13Source reference:
/affected/0/versions2.19-0ubuntu6.14Source reference:
/affected/0/versions2.19-0ubuntu6.15Source reference:
/affected/0/versions2.19-0ubuntu6.15+esm1Source reference:
/affected/0/versions2.19-0ubuntu6.15+esm2Source reference:
/affected/0/versions2.19-0ubuntu6.15+esm3Source reference:
/affected/0/versions2.19-0ubuntu6.15+esm4Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
glibc
Source reference: /affected/1/package/name
- Affected versions
- 2.21-0ubuntu4
Source reference:
/affected/1/versions2.21-0ubuntu5Source reference:
/affected/1/versions2.21-0ubuntu6Source reference:
/affected/1/versions2.23-0ubuntu1Source reference:
/affected/1/versions2.23-0ubuntu2Source reference:
/affected/1/versions2.23-0ubuntu3Source reference:
/affected/1/versions2.23-0ubuntu4Source reference:
/affected/1/versions2.23-0ubuntu5Source reference:
/affected/1/versions2.23-0ubuntu6Source reference:
/affected/1/versions2.23-0ubuntu7Source reference:
/affected/1/versions2.23-0ubuntu9Source reference:
/affected/1/versions2.23-0ubuntu10Source reference:
/affected/1/versions2.23-0ubuntu11Source reference:
/affected/1/versions2.23-0ubuntu11.2Source reference:
/affected/1/versions2.23-0ubuntu11.3Source reference:
/affected/1/versions2.23-0ubuntu11.3+esm1Source reference:
/affected/1/versions2.23-0ubuntu11.3+esm2Source reference:
/affected/1/versions2.23-0ubuntu11.3+esm3Source reference:
/affected/1/versions2.23-0ubuntu11.3+esm5Source reference:
/affected/1/versions2.23-0ubuntu11.3+esm6Source reference:
/affected/1/versions2.23-0ubuntu11.3+esm7Source reference:
/affected/1/versions2.23-0ubuntu11.3+esm8Source reference:
/affected/1/versions2.23-0ubuntu11.3+esm9Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
glibc
Source reference: /affected/2/package/name
- Affected versions
- 2.26-0ubuntu2
Source reference:
/affected/2/versions2.26-0ubuntu2.1Source reference:
/affected/2/versions2.27-0ubuntu2Source reference:
/affected/2/versions2.27-0ubuntu3Source reference:
/affected/2/versions2.27-3ubuntu1Source reference:
/affected/2/versions2.27-3ubuntu1.2Source reference:
/affected/2/versions2.27-3ubuntu1.3Source reference:
/affected/2/versions2.27-3ubuntu1.4Source reference:
/affected/2/versions2.27-3ubuntu1.5Source reference:
/affected/2/versions2.27-3ubuntu1.6Source reference:
/affected/2/versions2.27-3ubuntu1.6+esm1Source reference:
/affected/2/versions2.27-3ubuntu1.6+esm2Source reference:
/affected/2/versions2.27-3ubuntu1.6+esm3Source reference:
/affected/2/versions2.27-3ubuntu1.6+esm4Source reference:
/affected/2/versions2.27-3ubuntu1.6+esm5Source reference:
/affected/2/versions2.27-3ubuntu1.6+esm6Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
glibc
Source reference: /affected/3/package/name
- Affected versions
- 2.30-0ubuntu2
Source reference:
/affected/3/versions2.30-0ubuntu3Source reference:
/affected/3/versions2.31-0ubuntu5Source reference:
/affected/3/versions2.31-0ubuntu6Source reference:
/affected/3/versions2.31-0ubuntu7Source reference:
/affected/3/versions2.31-0ubuntu9Source reference:
/affected/3/versions2.31-0ubuntu9.1Source reference:
/affected/3/versions2.31-0ubuntu9.2Source reference:
/affected/3/versions2.31-0ubuntu9.3Source reference:
/affected/3/versions2.31-0ubuntu9.7Source reference:
/affected/3/versions2.31-0ubuntu9.9Source reference:
/affected/3/versions2.31-0ubuntu9.12Source reference:
/affected/3/versions2.31-0ubuntu9.14Source reference:
/affected/3/versions2.31-0ubuntu9.15Source reference:
/affected/3/versions2.31-0ubuntu9.16Source reference:
/affected/3/versions2.31-0ubuntu9.17Source reference:
/affected/3/versions2.31-0ubuntu9.18Source reference:
/affected/3/versions2.31-0ubuntu9.18+esm1Source reference:
/affected/3/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
glibc
Source reference: /affected/4/package/name
- Affected versions
- 2.34-0ubuntu3
Source reference:
/affected/4/versions2.35-0ubuntu1Source reference:
/affected/4/versions2.35-0ubuntu3Source reference:
/affected/4/versions2.35-0ubuntu3.1Source reference:
/affected/4/versions2.35-0ubuntu3.3Source reference:
/affected/4/versions2.35-0ubuntu3.4Source reference:
/affected/4/versions2.35-0ubuntu3.5Source reference:
/affected/4/versions2.35-0ubuntu3.6Source reference:
/affected/4/versions2.35-0ubuntu3.7Source reference:
/affected/4/versions2.35-0ubuntu3.8Source reference:
/affected/4/versions2.35-0ubuntu3.9Source reference:
/affected/4/versions2.35-0ubuntu3.10Source reference:
/affected/4/versions2.35-0ubuntu3.11Source reference:
/affected/4/versions2.35-0ubuntu3.12Source reference:
/affected/4/versions2.35-0ubuntu3.13Source reference:
/affected/4/versions2.35-0ubuntu3.14Source reference:
/affected/4/versions2.35-0ubuntu3.15Source reference:
/affected/4/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
glibc
Source reference: /affected/5/package/name
- Affected versions
- 2.38-1ubuntu6
Source reference:
/affected/5/versions2.38-3ubuntu1Source reference:
/affected/5/versions2.39-0ubuntu1Source reference:
/affected/5/versions2.39-0ubuntu2Source reference:
/affected/5/versions2.39-0ubuntu6Source reference:
/affected/5/versions2.39-0ubuntu8Source reference:
/affected/5/versions2.39-0ubuntu8.1Source reference:
/affected/5/versions2.39-0ubuntu8.2Source reference:
/affected/5/versions2.39-0ubuntu8.3Source reference:
/affected/5/versions2.39-0ubuntu8.4Source reference:
/affected/5/versions2.39-0ubuntu8.5Source reference:
/affected/5/versions2.39-0ubuntu8.6Source reference:
/affected/5/versions2.39-0ubuntu8.7Source reference:
/affected/5/versions2.39-0ubuntu8.8Source reference:
/affected/5/versions2.39-0ubuntu8.9Source reference:
/affected/5/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
glibc
Source reference: /affected/6/package/name
- Affected versions
- 2.42-0ubuntu3
Source reference:
/affected/6/versions2.42-2ubuntu1Source reference:
/affected/6/versions2.42-2ubuntu2Source reference:
/affected/6/versions2.42-2ubuntu4Source reference:
/affected/6/versions2.42-2ubuntu5Source reference:
/affected/6/versions2.43-2ubuntu1Source reference:
/affected/6/versions2.43-2ubuntu2Source reference:
/affected/6/versions2.43-2ubuntu2.3Source reference:
/affected/6/versions2.43-2ubuntu2.4Source reference:
/affected/6/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
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]Publisher severity
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