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openSUSE frr Important Denial of Service Issues 2026-2644-1

opensuse
Calendar Grey June 26, 2026
Dist Opensuse Esm H88
An important security update for openSUSE addresses multiple issues with the frr application, improving system safety.
An update that solves three vulnerabilities can now be installed.

Description

This update for frr fixes the following issues

* CVE-2026-28532: Denial of Service due to integer overflow in OSPF TLV parser

functions (bsc#1263859).

* CVE-2026-37457: An off-by-one out-of-bounds write vulnerability in the

bgp_flowspec_op_decode() function (bgpd/bgp_flowspec_util.c) of FRRouting

(FRR) stable/10.0 allows attackers to cause a Denial of Service

(bsc#1263863).

* CVE-2026-37458: missing input validation in the `MP_REACH_NLRI` component

allows authenticated attackers to cause a DoS via a crafted UPDATE message

(bsc#1263974).

Topics%20covered

Topics Covered

security advisory denial of service update important OpenSUSE frr

Patch

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like

YaST online_update or "zypper patch".

Alternatively you can run the command listed for your product:

* SUSE Linux Enterprise Server 15 SP4 LTSS

zypper in -t patch SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-2644=1

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4

zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-2644=1

* SUSE Linux Enterprise Server for SAP Applications 15 SP4

zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP4-2026-2644=1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4

zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-2644=1

* openSUSE Leap 15.3

zypper in -t patch SUSE-2026-2644=1

Package List

* openSUSE Leap 15.3 (aarch64 i586 ppc64le s390x x86_64)

* libfrrzmq0-debuginfo-7.4-150300.4.43.1

* libfrrfpm_pb0-7.4-150300.4.43.1

* frr-debugsource-7.4-150300.4.43.1

* libfrrsnmp0-debuginfo-7.4-150300.4.43.1

* libmlag_pb0-debuginfo-7.4-150300.4.43.1

* libfrrcares0-debuginfo-7.4-150300.4.43.1

* frr-7.4-150300.4.43.1

* libfrr_pb0-debuginfo-7.4-150300.4.43.1

* libfrrospfapiclient0-7.4-150300.4.43.1

* libfrrospfapiclient0-debuginfo-7.4-150300.4.43.1

* libfrrzmq0-7.4-150300.4.43.1

* libfrrsnmp0-7.4-150300.4.43.1

* frr-devel-7.4-150300.4.43.1

* libfrrcares0-7.4-150300.4.43.1

* libmlag_pb0-7.4-150300.4.43.1

* libfrr_pb0-7.4-150300.4.43.1

* libfrr0-7.4-150300.4.43.1

* libfrrgrpc_pb0-7.4-150300.4.43.1

* libfrr0-debuginfo-7.4-150300.4.43.1

* libfrrfpm_pb0-debuginfo-7.4-150300.4.43.1

* frr-debuginfo-7.4-150300.4.43.1

* libfrrgrpc_pb0-debuginfo-7.4-150300.4.43.1

* SUSE Linux Enterprise Server for SAP Applications 15 SP4 (ppc64le x86_64)

* libfrrzmq0-debuginfo-7.4-150300.4.43.1

* libfrrfpm_pb0-7.4-150300.4.43.1

*...

Read the Full Advisory

References

* bsc#1263859

* bsc#1263863

* bsc#1263974

## References:

* https://www.suse.com/security/cve/CVE-2026-28532.html

* https://www.suse.com/security/cve/CVE-2026-37457.html

* https://www.suse.com/security/cve/CVE-2026-37458.html

* https://bugzilla.suse.com/show_bug.cgi?id=1263859

* https://bugzilla.suse.com/show_bug.cgi?id=1263863

* https://bugzilla.suse.com/show_bug.cgi?id=1263974

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2644-1
Release Date: 2026-06-26T08:52:55Z
Affected Products: * openSUSE Leap 15.3 * SUSE Linux Enterprise High Performance Computing 15 SP4 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 * SUSE Linux Enterprise Server 15 SP4 * SUSE Linux Enterprise Server 15 SP4 LTSS * SUSE Linux Enterprise Server for SAP Applications 15 SP4

Topics%20covered

Topics Covered

security advisory denial of service update important OpenSUSE frr

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