Vulnerability in frr
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as DEBIAN-CVE-2026-28532 has been found in frr.
Risk of unauthorized operations or information disclosure.
What to do: upgrade frr to 8.4.4-1.1~deb12u2 or later.
If unsure, ask your IT team or search "frr DEBIAN-CVE-2026-28532" on the vendor's site.
DEBIAN-CVE-2026-28532 (frr)
Patched: 8.4.4-1.1~deb12u2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in frr.
Check the vendor advisory for the affected versions of frr.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 8.4.4-1.1~deb12u2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'frr' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1
Identify exposureidentify
grep -r 'frr' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
frrを grep し、稼働しているサービス・バージョンを把握する。 -
2
Apply patchpatch
Upgrade frr to 8.4.4-1.1~deb12u2ステージング環境で 8.4.4-1.1~deb12u2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3
Post-deployment verificationverify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
| Ecosystem | Package | Affected | Fixed |
|---|---|---|---|
| Debian:11 | frr |
All versions |
— |
| Debian:12 | frr |
< 8.4.4-1.1~deb12u2 |
8.4.4-1.1~deb12u2 |
| Debian:13 | frr |
< 10.3-3+deb13u1 |
10.3-3+deb13u1 |
| Debian:14 | frr |
< 10.5.3-1 |
10.5.3-1 |
Original description The description as published by the source.
FRRouting before 10.5.3 contains an integer overflow vulnerability in seven OSPF Traffic Engineering and Segment Routing TLV parser functions where a uint16_t accumulator variable truncates uint32_t values returned by the TLV_SIZE() macro, causing the loop termination condition to fail while pointer advancement continues unchecked. Attackers with an established OSPF adjacency can send a crafted LS Update packet with a malicious Type 10 or Type 11 Opaque LSA to trigger out-of-bounds memory reads and crash all affected routers in the OSPF area or autonomous system.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- advisory security-tracker.debian.org