SUSE-SU-2026:4021-1

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Source
https://www.suse.com/support/update/announcement/2026/suse-su-20264021-1/
Import Source
https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/SUSE-SU-2026:4021-1
Upstream
CVE (6)
Related
CVE (6)
Published
2026-09-07T07:42:20Z
Modified
2026-09-13T18:23:29Z
Summary
Security update for c-ares
Details

This update for c-ares fixes the following issues:

  • CVE-2024-25629: out of bounds read in ares__read_line() (bsc#1220279).
  • CVE-2025-31498: use-after-free in read_answers() when process_answer() may re-enqueue a query (bsc#1240955).
  • CVE-2025-62408: c-ares 1.32.3-1.34.5 use after free() (bsc#1254738).
  • CVE-2026-33630: Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via ares_getaddrinfo() over TCP (bsc#1270416).
  • CVE-2026-69184: CPU-exhaustion denial of service via unbounded DNS name compression pointer chains (bsc#1276290).
  • CVE-2026-69186: Memory-amplification denial of service via unvalidated DNS header record counts (bsc#1276291).

Changes for c-ares:

  • updated to 1.36.8.
References

Affected packages

SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Micro 5.3
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Micro%205.3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Micro 5.4
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Micro%205.4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Micro 5.5
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Micro%205.5

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Module for Basesystem 15 SP7
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Server 15 SP4-LTSS
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Server 15 SP5-LTSS
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Server 15 SP6-LTSS
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Server for SAP Applications 15 SP5
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"
SUSE:Linux Enterprise Server for SAP Applications 15 SP6
c-ares

Package

Name
c-ares
Purl
pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.34.8-150000.3.29.1

Ecosystem specific 

{
    "binaries":  [
        {
            "c-ares-devel":  "1.34.8-150000.3.29.1",
            "libcares2":  "1.34.8-150000.3.29.1"
        }
    ]
}

Database specific

source 
"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4021-1.json"