Description
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 (DoS) via supplying a crafted FlowSpec component.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | frr | 10.6.0-2 | — |
| Debian 13 | frr | 10.3-3+deb13u1 | — |
| Debian 12 | frr | 8.4.4-1.1~deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | frr | 10.5.1-1ubuntu4.1 | — |
| Ubuntu 25.10 | frr | 10.4.1-3ubuntu1.4 | — |
| Ubuntu 24.04 LTS | frr | 8.4.4-1.1ubuntu6.7 | — |
| Ubuntu 22.04 LTS | frr | 8.1-1ubuntu1.16 | — |
| Ubuntu 20.04 LTS | quagga | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | frr | No fix yet | — |
| Ubuntu Pro 18.04 LTS | quagga | No fix yet | — |
| Ubuntu Pro 16.04 LTS | quagga | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | frr +1 | 10.4.4-1.el10_2 | RHSA-2026:24347 |
| RHEL 9 | frr +1 | 8.5.3-13.el9_8 | RHSA-2026:24371 |
| RHEL 9 | frr10 +1 | 10.4.3-3.el9_8 | RHSA-2026:24370 |
| RHEL 8 | frr +1 | 7.5.1-24.el8_10 | RHSA-2026:24340 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | frr +1 | 10.4.4-1.el10_2 | ALSA-2026:24347 |
| AlmaLinux 9 | frr +1 | 8.5.3-13.el9_8 | ALSA-2026:24371 |
| AlmaLinux 9 | frr10 +1 | 10.4.3-3.el9_8 | ALSA-2026:24370 |
| AlmaLinux 8 | frr +1 | 7.5.1-24.el8_10 | ALSA-2026:24340 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | frr | 10.4.4-1.el10_2 | RLSA-2026:24347 |
| Rocky Linux 9 | frr | 8.5.3-13.el9_8 | RLSA-2026:24371 |
| Rocky Linux 9 | frr10 | 10.4.3-3.el9_8 | RLSA-2026:24370 |
| Rocky Linux 8 | frr | 7.5.1-24.el8_10 | RLSA-2026:24340 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | frr | 8.5.7-150500.4.43.1 | SUSE-SU-2026:2457-1, SUSE-SU-2026:2454-1 |
| SLES 15 SP6 | frr | 8.5.7-150500.4.43.1 | SUSE-SU-2026:2454-1 |
| SLES 15 SP5 | frr | 8.5.7-150500.4.43.1 | SUSE-SU-2026:2454-1 |
| SLES 15 SP4 | frr | 7.4-150300.4.43.1 | SUSE-SU-2026:2644-1 |
| SLES 12 SP5 | frr | 8.5.7-8.16.1 | SUSE-SU-2026:2455-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | frr | 10.2.6-160000.1.1 | SUSE-SU-2026:22026-1 |
| SLES for SAP 15 SP6 | frr | 8.5.7-150500.4.43.1 | SUSE-SU-2026:2454-1 |
| SLES for SAP 15 SP5 | frr | 8.5.7-150500.4.43.1 | SUSE-SU-2026:2454-1 |
| SLES for SAP 15 SP4 | frr | 7.4-150300.4.43.1 | SUSE-SU-2026:2644-1 |
| SLES 16.0 | frr | 10.2.6-160000.1.1 | SUSE-SU-2026:22026-1 |
| SLE HPC 15 SP5 | frr | 8.5.7-150500.4.43.1 | SUSE-SU-2026:2454-1 |
| SLE HPC 15 SP4 | frr | 7.4-150300.4.43.1 | SUSE-SU-2026:2644-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | frr | 10.6.1-1.1 | openSUSE-SU-2026:10721-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | frr | 10.5.4-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | frr +1 | 10.4.4-1.el10_2 | ELSA-2026-24347 |
| Oracle Linux 9 | frr +1 | 8.5.3-13.el9_8 | ELSA-2026-24371 |
| Oracle Linux 9 | frr10 +1 | 10.4.3-3.el9_8 | ELSA-2026-24370 |
| Oracle Linux 8 | frr +1 | 7.5.1-24.0.1.el8_10 | ELSA-2026-24340 |
Advisories 23
- ALSA-2026:24347 Important: frr security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2026:24370 Important: frr10 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:24371 Important: frr security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:24340 Important: frr security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:24347 Red Hat Security Advisory: frr security update Red Hat Security Advisories (RHSA) · Aug 4, 2026
- WID-SEC-2026-1333 FRRouting Project FRRouting: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Jul 16, 2026
- ELSA-2026-24347 Important: frr security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- RHSA-2026:24371 Red Hat Security Advisory: frr security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2026:24370 Red Hat Security Advisory: frr10 security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2026:24340 Red Hat Security Advisory: frr security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- SUSE-SU-2026:2644-1 Security update for frr SUSE / openSUSE Security Updates · Jun 27, 2026
- ELSA-2026-24370 Important: frr10 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 24, 2026
- ELSA-2026-24371 Important: frr security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- SUSE-SU-2026:2455-1 Security update for frr SUSE / openSUSE Security Updates · Jun 19, 2026
- SUSE-SU-2026:2457-1 Security update for frr SUSE / openSUSE Security Updates · Jun 19, 2026
- SUSE-SU-2026:2454-1 Security update for frr SUSE / openSUSE Security Updates · Jun 19, 2026
- RLSA-2026:24371 Important: frr security update Rocky Linux Security Advisories · Jun 11, 2026
- RLSA-2026:24347 Important: frr security update Rocky Linux Security Advisories · Jun 11, 2026
- RLSA-2026:24370 Important: frr10 security update Rocky Linux Security Advisories · Jun 11, 2026
- RLSA-2026:24340 Important: frr security update Rocky Linux Security Advisories · Jun 11, 2026
- SUSE-SU-2026:22026-1 Security update for frr SUSE / openSUSE Security Updates · Jun 9, 2026
- ELSA-2026-24340 Important: frr security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 8, 2026
- openSUSE-SU-2026:10721-1 frr-10.6.1-1.1 on GA media SUSE / openSUSE Security Updates · May 9, 2026