Linux Distros Unpatched Vulnerability : CVE-2026-56416

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In NLnet Labs Unbound up to and including version 1.25.1, when the validator builds the canonical RDATA form for an RRSIG-covered PX/RP/MINFO/SOA RRset, it...

CVE-2026-56416

Technical details required to assess impact are not publicly available in the provided documents. No additional specifics (versions beyond 1.25.1, exploitation paths, or fixes) are included. Monitor for updates.

EUVD-2026-47684

In NLnet Labs Unbound up to and including version 1.25.1, when the validator builds the canonical RDATA form for an RRSIG-covered PX/RP/MINFO/SOA RRset, it computes the address of the second embedded domain name as 'datstart + dnamevaliddatstart, ...' and passes it straight to 'querydnametolower'...

CVE-2026-56416 Possible heap buffer overflow when validator canonicalizes RDATA that contains domain name

In NLnet Labs Unbound up to and including version 1.25.1, when the validator builds the canonical RDATA form for an RRSIG-covered PX/RP/MINFO/SOA RRset, it computes the address of the second embedded domain name as 'datstart + dnamevaliddatstart, ...' and passes it straight to 'querydnametolower'...

CVE-2026-56416 Possible heap buffer overflow when validator canonicalizes RDATA that contains domain name

In NLnet Labs Unbound up to and including version 1.25.1, when the validator builds the canonical RDATA form for an RRSIG-covered PX/RP/MINFO/SOA RRset, it computes the address of the second embedded domain name as 'datstart + dnamevaliddatstart, ...' and passes it straight to 'querydnametolower'...

glibc: glibc: Application crash or uninitialized memory read via crafted DNS response

A flaw was found in glibc GNU C Library. The deprecated functions nsprintrrf, nsprintrr, and fpnquery do not properly validate the length of RDATA Resource Record Data in a DNS Domain Name System response when processing specific record types like LOC, CERT, TKEY, or TSIG. A remote attacker could...

glibc: glibc: Application crash or uninitialized memory read via crafted DNS response

A flaw was found in glibc GNU C Library. The deprecated functions nsprintrrf, nsprintrr, and fpnquery do not properly validate the length of RDATA Resource Record Data in a DNS Domain Name System response when processing specific record types like LOC, CERT, TKEY, or TSIG. A remote attacker could...

SUSE SLES15: glibc / glibc-32bit / glibc-devel / glibc-devel-32bit / etc (SUSE-SU-2026:3029-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3029-1 advisory. This update for glibc fixes the following issues - CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an...

Security update for glibc

This update for glibc fixes the following issues CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out-of-bounds write bsc1263656. CVE-2026-6238: insufficient RDATA length validation can lead to application crashes or uninitialized memory disclosure bsc1263658. Patch...

SUSE-SU-2026:3030-1 Security update for glibc

This update for glibc fixes the following issues - CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out-of-bounds write bsc1263656. - CVE-2026-6238: insufficient RDATA length validation can lead to application crashes or uninitialized memory disclosure bsc1263658...

SUSE-SU-2026:3029-1 Security update for glibc

This update for glibc fixes the following issues - CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out-of-bounds write bsc1263656. - CVE-2026-6238: insufficient RDATA length validation can lead to application crashes or uninitialized memory disclosure bsc1263658...

SUSE-SU-2026:22523-1 Security update for glibc

This update for glibc fixes the following issues - CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out-of-bounds write bsc1263656. - CVE-2026-6238: insufficient RDATA length validation can lead to application crashes or uninitialized memory disclosure bsc1263658...

openSUSE 16: cross-aarch64-glibc-devel / cross-ppc64le-glibc-devel / etc (openSUSE-SU-2026:21228-1)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21228-1 advisory. This update for glibc fixes the following issues - CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out-of-bounds write...

OPENSUSE-SU-2026:21228-1 Security update for glibc

This update for glibc fixes the following issues - CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out-of-bounds write bsc1263656. - CVE-2026-6238: insufficient RDATA length validation can lead to application crashes or uninitialized memory disclosure bsc1263658...

SUSE-SU-2026:22538-1 Security update for glibc

This update for glibc fixes the following issues - CVE-2026-5435: unchecked buffer writing in TSIG handling can lead to an out-of-bounds write bsc1263656. - CVE-2026-6238: insufficient RDATA length validation can lead to application crashes or uninitialized memory disclosure bsc1263658...

Astra Linux – Vulnerability in unbound

Before version 1.9.5, Unbound allowed an out-of-bounds write operation through a compressed name in rdatacopy. NOTE: The vendor disputes that this is a vulnerability. Although the code may be vulnerable, an ongoing Unbound installation cannot be remotely or locally exploited...

CVE-2026-6238

A flaw was found in glibc GNU C Library. The deprecated functions nsprintrrf, nsprintrr, and fpnquery do not properly validate the length of RDATA Resource Record Data in a DNS Domain Name System response when processing specific record types like LOC, CERT, TKEY, or TSIG. A remote attacker could...

CVE-2026-6238 Buffer overread in ns_printrrf with corrupted RDATA field

The deprecated functions nsprintrrf, nsprintrr and fpnquery in the GNU C Library version 2.0.1 to version 2.43 fail to validate the RDATA content against the RDATA length in a DNS response when processing A6, CERT, LOC, TKEY or TSIG records, which may allow an attacker to craft a DNS response,...

EUVD-2026-26071

The deprecated functions nsprintrrf, nsprintrr and fpnquery in the GNU C Library version 2.2 and newer fail to validate the RDATA content against the RDATA length in a DNS response when processing LOC, CERT, TKEY or TSIG records, which may allow an attacker to craft a DNS response, causing a targ...

CVE-2026-6238

The deprecated functions nsprintrrf, nsprintrr and fpnquery in the GNU C Library version 2.0.1 to version 2.43 fail to validate the RDATA content against the RDATA length in a DNS response when processing A6, CERT, LOC, TKEY or TSIG records, which may allow an attacker to craft a DNS response,...