| Name | CVE-2026-28532 |
| Description | 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 | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6322-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| frr (PTS) | bullseye | 7.5.1-1.1+deb11u2 | vulnerable |
| bullseye (security) | 7.5.1-1.1+deb11u4 | vulnerable |
| bookworm | 8.4.4-1.1~deb12u1 | vulnerable |
| bookworm (security) | 8.4.4-1.1~deb12u2 | fixed |
| trixie | 10.3-3 | vulnerable |
| trixie (security) | 10.3-3+deb13u1 | fixed |
| forky, sid | 10.6.1-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| frr | source | bookworm | 8.4.4-1.1~deb12u2 | DSA-6322-1 |
| frr | source | trixie | 10.3-3+deb13u1 | DSA-6322-1 |
| frr | source | (unstable) | 10.5.3-1 |
Notes
https://github.com/FRRouting/frr/pull/21002
Fixed by: https://github.com/FRRouting/frr/commit/d3e8aedb87671f38db59b0df908e25e1d4af027d (main)
Fixed by: https://github.com/FRRouting/frr/commit/4b02ef93ef15030cb2d3d84a078cfb92e2c0aa84 (frr-10.5.3)
