CVE catalog

CVE-2026-48688

FastNetMon Community Edition through 1.2.9 contains multiple out-of-bounds reads in the BGP MP_REACH_NLRI IPv6 attribute decoder. The function decode_mp_reach_ipv6() in src/bgp_protocol.cpp contains a

[CVE catalog]

Severity
High · CVSS 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published
Source
[NVD] · [CVE record]
EPSS
0.28% · Oct 25, 2026

FastNetMon Community Edition through 1.2.9 contains multiple out-of-bounds reads in the BGP MP_REACH_NLRI IPv6 attribute decoder. The function decode_mp_reach_ipv6() in src/bgp_protocol.cpp contains a TODO comment at line 156 explicitly acknowledging 'we should add sanity checks to avoid reads after attribute memory block.' The function casts raw pointers to structure types without verifying sufficient data exists (line 158), uses the attacker-controlled length_of_next_hop field to determine memcpy size (line 181), and computes prefix_length by dereferencing a pointer calculated from multiple attacker-controlled offsets without bounds validation (line 189). The prefix_length is then used to calculate number_of_bytes_required_for_prefix which becomes a memcpy length (line 202) with no check against remaining buffer size.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianfastnetmonsid1.2.9-1fixed
Debianfastnetmonforky1.2.9-1fixed
Debianfastnetmontrixie1.2.9-0+deb13u1fixed
Debianfastnetmontrixie-security1.2.9-0+deb13u1fixed
Debianfastnetmonbookworm1.2.4-2+deb12u1not affected
Debianfastnetmonbookworm-security1.2.4-2+deb12u1not affected
CpefastnetmonNot reportedNot reportedvulnerable
CpefastnetmonNot reportedNot reportedunknown

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianfastnetmonsourcesid1.2.9-1not yet assignedNot reported[1138646]
Debianfastnetmonsourceforky1.2.9-1not yet assignedNot reported[1138646]
Debianfastnetmonsourcetrixie1.2.9-0+deb13u1not yet assignedNot reported[1138646]
DebianfastnetmonsourcebookwormNot affectedunimportantNot reported[1138646]

[Debian bug #1138646]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [fastnetmon]Not affected
    Details (6)

    • 1.2.4-2+deb12u1 · amd64 · bookworm

      Not affected

      nvd · fastnetmon · debian · bookworm

    • 1.2.4-2+deb12u1 · arm64 · bookworm

      Not affected

      nvd · fastnetmon · debian · bookworm

    • 1.2.8-1~bpo12+1 · amd64 · bookworm-backports

      Not affected

      nvd · fastnetmon · debian · bookworm

    • 1.2.8-1~bpo12+1 · arm64 · bookworm-backports

      Not affected

      nvd · fastnetmon · debian · bookworm

    • 1.2.4-2+deb12u1 · amd64 · bookworm-security

      Not affected

      nvd · fastnetmon · debian · bookworm

    • 1.2.4-2+deb12u1 · arm64 · bookworm-security

      Not affected

      nvd · fastnetmon · debian · bookworm

[Debian 13 (Trixie)]

  • [fastnetmon]Fixed
    Details (4)

    • 1.2.9-0+deb13u1 · amd64 · trixie

      Fixed · Fixed: 1.2.9-0+deb13u1

      nvd · fastnetmon · debian · 13

    • 1.2.9-0+deb13u1 · arm64 · trixie

      Fixed · Fixed: 1.2.9-0+deb13u1

      nvd · fastnetmon · debian · 13

    • 1.2.9-0+deb13u1 · amd64 · trixie-security

      Fixed · Fixed: 1.2.9-0+deb13u1

      nvd · fastnetmon · debian · 13

    • 1.2.9-0+deb13u1 · arm64 · trixie-security

      Fixed · Fixed: 1.2.9-0+deb13u1

      nvd · fastnetmon · debian · 13

Observed:

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]