Description
In the Opaque LSA Extended Link parser in FRRouting (FRR) through 9.1, there can be a buffer overflow and daemon crash in ospf_te_parse_ext_link for OSPF LSA packets during an attempt to read Segment Routing Adjacency SID subTLVs (lengths are not validated).
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 | 10.0.1-0.1 | — |
| 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 24.04 LTS | frr | 8.4.4-1.1ubuntu6.1 | USN-6794-1 |
| Ubuntu 22.04 LTS | frr | 8.1-1ubuntu1.10 | USN-6794-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | frr | 8.4-150500.4.23.1 | SUSE-SU-2024:4090-1, SUSE-SU-2024:1971-1 |
| SLES 15 SP5 | frr | 8.4-150500.4.23.1 | SUSE-SU-2024:4090-1, SUSE-SU-2024:1971-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | frr | 8.4-12.1 | openSUSE-SU-2024:14038-1 |
| openSUSE Leap 15.6 | frr | 8.4-150500.4.23.1 | SUSE-SU-2024:4090-1, SUSE-SU-2024:1971-1 |
| openSUSE Leap 15.5 | frr | 8.4-150500.4.23.1 | SUSE-SU-2024:4090-1, SUSE-SU-2024:1971-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | frr | 8.5.5-1 | — |
Advisories 5
- WID-SEC-2024-0806 FRRouting Project FRRouting: Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Jun 4, 2026
- USN-6794-1 frr vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2024:14038-1 frr-8.4-12.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4090-1 Security update for frr SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1971-1 Security update for frr SUSE / openSUSE Security Updates · Feb 4, 2026