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SUSE frr Important Denial of Service Fix for 2026-2644-1

suse
Calendar Grey June 26, 2026
Dist Suse Esm H88
This update resolves three important vulnerabilities for frr in SUSE, addressing critical Denial of Service issues and more.
An update that solves three vulnerabilities can now be installed.

Summary

## 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). ## 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

Topics%20covered

Topics Covered

security advisory denial of service important OpenSUSE frr 2026-2644-1

References

* bsc#1263859

* bsc#1263863

* bsc#1263974

Cross-

* CVE-2026-28532

* CVE-2026-37457

* CVE-2026-37458

CVSS scores:

* CVE-2026-28532 ( SUSE ): 6.0

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-28532 ( SUSE ): 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-28532 ( NVD ): 6.0

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-28532 ( NVD ): 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2644-1
Release Date: 2026-06-26T08:52:55Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service important OpenSUSE frr 2026-2644-1

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