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OPENSUSE-SU-2026:20748-1

Vulnerability from csaf_opensuse - Published: 2026-05-13 16:33 - Updated: 2026-09-16 21:37
Summary
Security update for dnsmasq
Severity
Important
Notes
Title of the patch: Security update for dnsmasq
Description of the patch: This update for dnsmasq fixes the following issues Security issues: - CVE-2026-2291: dnsmasq can be abused to record false cached data enabling DoS or attacker redirect (bsc#1258251). - CVE-2026-4890: DoS vulnerability in the DNSSEC validation (bsc#1265001). - CVE-2026-4891: heap-based out-of-bounds read vulnerability in the DNSSEC validation (bsc#1265002). - CVE-2026-4892: heap-based out-of-bounds write vulnerability in the DHCPv6 implementation (bsc#1265003). - CVE-2026-4893: information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks (bsc#1265004). - CVE-2026-5172: buffer overflow in dnsmasq's extract_addresses() function (bsc#1265006). - CVE-2026-6507: out-of-bounds write in DHCP BOOTREPLY processing can lead to denial of service (bsc#1262487). Non security issues: - aardvark-dns upstream tests make dnsmasq dump core (bsc#1247812). - Drop rcFOO symlinks for CODE16 (jsc#PED-266. - libnettle: update to 4.0 breaks dnsmasq and gnutls (bsc#1257934). - unknown user or group: dnsmasq with latest proposed dnsmasq update when doing virsh net-start (bsc#1235517). - Update to security release 2.92rel2.
Patchnames: openSUSE-Leap-16.0-742
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-2291
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: openSUSE Leap 16.0:dnsmasq-2.92rel2-160000.1.1.aarch64 —
Vendor Fix
Unresolved product id: openSUSE Leap 16.0:dnsmasq-2.92rel2-160000.1.1.ppc64le —
Vendor Fix
Unresolved product id: openSUSE Leap 16.0:dnsmasq-2.92rel2-160000.1.1.s390x —
Vendor Fix
Unresolved product id: openSUSE Leap 16.0:dnsmasq-2.92rel2-160000.1.1.x86_64 —
Vendor Fix
Unresolved product id: openSUSE Leap 16.0:dnsmasq-utils-2.92rel2-160000.1.1.aarch64 —
Vendor Fix
Unresolved product id: openSUSE Leap 16.0:dnsmasq-utils-2.92rel2-160000.1.1.ppc64le —
Vendor Fix
Unresolved product id: openSUSE Leap 16.0:dnsmasq-utils-2.92rel2-160000.1.1.s390x —
Vendor Fix
Unresolved product id: openSUSE Leap 16.0:dnsmasq-utils-2.92rel2-160000.1.1.x86_64 —
Vendor Fix
Threats
Impact important
CVE-2026-4890
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 8 products, the same list as for CVE-2026-2291
Threats
Impact important
CVE-2026-4891
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
Recommended 8 products, the same list as for CVE-2026-2291
Threats
Impact moderate
CVE-2026-4892
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Recommended 8 products, the same list as for CVE-2026-2291
Threats
Impact important
CVE-2026-4893
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected products
Recommended 8 products, the same list as for CVE-2026-2291
Threats
Impact moderate
CVE-2026-5172
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 8 products, the same list as for CVE-2026-2291
Threats
Impact important
CVE-2026-6507
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Recommended 8 products, the same list as for CVE-2026-2291
Threats
Impact important
References
URL Category
https://www.suse.com/support/security/rating/ external
https://ftp.suse.com/pub/projects/security/csaf/o… self
https://bugzilla.suse.com/1235517 self
https://bugzilla.suse.com/1235834 self
https://bugzilla.suse.com/1247812 self
https://bugzilla.suse.com/1257934 self
https://bugzilla.suse.com/1258251 self
https://bugzilla.suse.com/1262487 self
https://bugzilla.suse.com/1265001 self
https://bugzilla.suse.com/1265002 self
https://bugzilla.suse.com/1265003 self
https://bugzilla.suse.com/1265004 self
https://bugzilla.suse.com/1265006 self
https://www.suse.com/security/cve/CVE-2026-2291/ self
https://www.suse.com/security/cve/CVE-2026-4890/ self
https://www.suse.com/security/cve/CVE-2026-4891/ self
https://www.suse.com/security/cve/CVE-2026-4892/ self
https://www.suse.com/security/cve/CVE-2026-4893/ self
https://www.suse.com/security/cve/CVE-2026-5172/ self
https://www.suse.com/security/cve/CVE-2026-6507/ self
https://www.suse.com/security/cve/CVE-2026-2291 external
https://bugzilla.suse.com/1258251 external
https://www.suse.com/security/cve/CVE-2026-4890 external
https://bugzilla.suse.com/1265001 external
https://www.suse.com/security/cve/CVE-2026-4891 external
https://bugzilla.suse.com/1265002 external
https://www.suse.com/security/cve/CVE-2026-4892 external
https://bugzilla.suse.com/1265003 external
https://www.suse.com/security/cve/CVE-2026-4893 external
https://bugzilla.suse.com/1265004 external
https://www.suse.com/security/cve/CVE-2026-5172 external
https://bugzilla.suse.com/1265006 external
https://www.suse.com/security/cve/CVE-2026-6507 external
https://bugzilla.suse.com/1262487 external
To clipboard 

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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.