{"id":"CVE-2026-28532","aliases":["AZL-85332","DEBIAN-CVE-2026-28532","EUVD-2026-26418","GHSA-wjc3-2qjv-c8fp","SUSE-SU-2026:22026-1","SUSE-SU-2026:2454-1","SUSE-SU-2026:2455-1","SUSE-SU-2026:2457-1","SUSE-SU-2026:2644-1","UBUNTU-CVE-2026-28532","USN-8376-1","openSUSE-SU-2026:10721-1","openSUSE-SU-2026:20898-1"],"status":"published","title":"FRRouting \u003c 10.5.3 Integer Overflow in OSPF TLV Parser Functions","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.","severity":{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00225,"percentile":0.13302,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125","CWE-190"],"published":"2026-04-30T20:17:51Z","modified":"2026-11-09T02:47:23Z","fixes":[{"ecosystem":"Azure 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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.","status":"published","published":"2026-04-30T20:17:51.06Z","modified":"2026-11-08T14:01:51.138Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-190","CWE-125"],"updated_at":"2026-11-08T15:43:32.737211Z"}],"euvd":[{"id":"EUVD-2026-26418","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.","status":"published","published":"2026-04-30T20:17:51Z","modified":"2026-11-08T14:01:51Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-08T15:13:09.785497Z"}],"ghsa":[{"id":"GHSA-wjc3-2qjv-c8fp","title":"FRRouting before 10.5.3 contains an integer overflow vulnerability in seven OSPF Traffic...","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.","status":"published","published":"2026-04-30T21:30:37Z","modified":"2026-04-30T21:30:38Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:07:52.236911Z"}],"nvd":[{"id":"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.","status":"published","published":"2026-04-30T21:16:31.25Z","modified":"2026-10-26T22:10:00.163Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-125","CWE-190"],"updated_at":"2026-11-02T14:12:16.626888Z"}],"osv":[{"id":"CVE-2026-28532","title":"FRRouting \u003c 10.5.3 Integer Overflow in OSPF TLV Parser Functions","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.","status":"published","published":"2026-04-30T20:17:51.06Z","modified":"2026-11-09T02:47:23.065771395Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-125","CWE-190"],"updated_at":"2026-11-09T03:16:17.543303Z"},{"id":"DEBIAN-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.","status":"published","published":"2026-04-30T21:16:31.25Z","modified":"2026-10-27T09:47:33.59505528Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:53.877573Z"},{"id":"UBUNTU-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.","status":"published","published":"2026-04-30T21:16:00Z","modified":"2026-11-05T19:01:04.592221437Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-05T19:27:36.688147Z"},{"id":"AZL-85332","title":"CVE-2026-28532 affecting package frr for versions less than 10.5.0-3","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.","status":"published","published":"2026-04-30T21:16:31Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:24.988217Z"},{"id":"openSUSE-SU-2026:10721-1","title":"frr-10.6.1-1.1 on GA media","description":"These are all security issues fixed in the frr-10.6.1-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-05-08T00:00:00Z","modified":"2026-05-09T07:45:48.125228Z","updated_at":"2026-11-02T16:58:38.415593Z"},{"id":"openSUSE-SU-2026:20898-1","title":"Security update for frr","description":"This update for frr fixes the following issues:\n\n- CVE-2026-5107: Fixed an improper access controls in EVPN Type-2 Route Handler (bsc#1261013).\n- CVE-2026-28532: Harden TE/SR TLV iteration against malformed lengths (bsc#1263859).\n- CVE-2026-37457: Fix off-by-one error in FlowSpec operator array bounds check (bsc#1263863).\n- CVE-2026-37458: Validate MP_REACH_NLRI attribute against incorrect next-hop (bsc#1263974).\n","status":"published","published":"2026-06-03T09:46:09Z","modified":"2026-06-06T18:24:32.122396762Z","updated_at":"2026-11-02T16:58:41.885092Z"},{"id":"SUSE-SU-2026:22026-1","title":"Security update for frr","description":"This update for frr fixes the following issues:\n\n- CVE-2026-5107: Fixed an improper access controls in EVPN Type-2 Route Handler (bsc#1261013).\n- CVE-2026-28532: Harden TE/SR TLV iteration against malformed lengths (bsc#1263859).\n- CVE-2026-37457: Fix off-by-one error in FlowSpec operator array bounds check (bsc#1263863).\n- CVE-2026-37458: Validate MP_REACH_NLRI attribute against incorrect next-hop (bsc#1263974).\n","status":"published","published":"2026-06-03T09:45:24Z","modified":"2026-06-09T18:24:28.421755542Z","updated_at":"2026-11-02T15:54:02.654057Z"},{"id":"SUSE-SU-2026:2454-1","title":"Security update for frr","description":"This update for frr fixes the following issues\n\nUpdate to frr 8.5.7:\n\n- CVE-2026-5107: Fixed an improper access controls in EVPN Type-2 Route Handler (bsc#1261013).\n- CVE-2026-28532: Harden TE/SR TLV iteration against malformed lengths (bsc#1263859).\n- CVE-2026-37457: Fix off-by-one error in FlowSpec operator array bounds check (bsc#1263863).\n- CVE-2026-37458: Validate MP_REACH_NLRI attribute against incorrect next-hop (bsc#1263974).\n  DoS via a crafted UPDATE message (bsc#1263974).\n","status":"published","published":"2026-06-18T14:02:41Z","modified":"2026-06-19T08:15:05.714563473Z","updated_at":"2026-11-02T15:54:04.519245Z"},{"id":"SUSE-SU-2026:2455-1","title":"Security update for frr","description":"This update for frr fixes the following issues\n\n- CVE-2026-5107: Fixed an improper access controls in EVPN Type-2 Route Handler (bsc#1261013).\n- CVE-2026-28532: Harden TE/SR TLV iteration against malformed lengths (bsc#1263859).\n- CVE-2026-37457: Fix off-by-one error in FlowSpec operator array bounds check (bsc#1263863).\n- CVE-2026-37458: Validate MP_REACH_NLRI attribute against incorrect next-hop (bsc#1263974).\n","status":"published","published":"2026-06-18T14:02:48Z","modified":"2026-06-19T08:15:07.138593658Z","updated_at":"2026-11-02T15:54:04.519245Z"},{"id":"SUSE-SU-2026:2457-1","title":"Security update for frr","description":"This update for frr fixes the following issue:\n\n- CVE-2026-5107: Fixed an improper access controls in EVPN Type-2 Route Handler (bsc#1261013).\n- CVE-2026-28532: Harden TE/SR TLV iteration against malformed lengths (bsc#1263859).\n- CVE-2026-37457: Fix off-by-one error in FlowSpec operator array bounds check (bsc#1263863).\n- CVE-2026-37458: Validate MP_REACH_NLRI attribute against incorrect next-hop (bsc#1263974).\n","status":"published","published":"2026-06-18T15:54:17Z","modified":"2026-06-19T08:15:07.126530908Z","updated_at":"2026-11-02T15:54:04.519245Z"},{"id":"SUSE-SU-2026:2644-1","title":"Security update for frr","description":"This update for frr fixes the following issues\n\n- CVE-2026-28532: Denial of Service due to integer overflow in OSPF TLV parser functions (bsc#1263859).\n- CVE-2026-37457: An off-by-one out-of-bounds write vulnerability in the bgp_flowspec_op_decode() function\n  (bgpd/bgp_flowspec_util.c) of FRRouting (FRR) stable/10.0 allows attackers to cause a Denial of Service (bsc#1263863).\n- CVE-2026-37458: missing input validation in the `MP_REACH_NLRI` component allows authenticated attackers to cause a\n  DoS via a crafted UPDATE message (bsc#1263974).\n","status":"published","published":"2026-06-26T08:52:49Z","modified":"2026-06-27T08:45:06.605622547Z","updated_at":"2026-11-02T15:54:04.519245Z"},{"id":"USN-8376-1","title":"frr vulnerabilities","description":"It was discovered that FRR incorrectly handled certain OSPF Traffic\nEngineering and Segment Routing TLVs. An attacker could possibly use this\nissue to cause FRR to crash, resulting in a denial of service.\n(CVE-2026-28532)\n\nIt was discovered that FRR incorrectly handled certain BGP FlowSpec\ncomponents. An attacker could possibly use this issue to cause FRR to\ncrash, resulting in a denial of service. (CVE-2026-37457)\n\nIt was discovered that FRR did not properly validate certain MP_REACH_NLRI\nmessages. An authenticated user could possibly use this issue to cause FRR\nto crash, resulting in a denial of service. (CVE-2026-37458)\n\nIt was discovered that FRR incorrectly handled processing certain BGP\nUPDATE messages. An attacker could possibly use this issue to cause FRR to\ncrash, resulting in a denial of service. This issue only affected Ubuntu\n25.04 and Ubuntu 25.10. (CVE-2026-37459)","status":"published","published":"2026-06-03T13:15:15Z","modified":"2026-06-30T18:17:05.167511844Z","updated_at":"2026-11-02T16:58:25.103481Z"}]}}