CVE-2026-28532

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-04-30. the CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

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.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

April 30, 2026

Last Modified

May 25, 2026

Advisory Details (4)

Auto-updated Apr 30, 2026
No patch confirmed yet.
generic

FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions | Advisories | VulnCheck

https://www.vulncheck.com/advisories/frrouting-integer-overflow-in-ospf-tlv-parser-functions
generic

Release FRR Release 10.5.3 · FRRouting/frr · GitHub

https://github.com/FRRouting/frr/releases/tag/frr-10.5.3
generic

ospfd: harden TE/SR TLV iteration against malformed lengths by Jafaral · Pull Request #21002 · FRRouting/frr · GitHub

https://github.com/FRRouting/frr/pull/21002
generic

Merge pull request #21002 from Jafaral/ospf-fix · FRRouting/frr@f098dec · GitHub

https://github.com/FRRouting/frr/commit/f098decf02987fbf1c891766c1516ac832adadfd

Vendor Advisories for CVE-2026-28532(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntufrr-snmp (10.4.1-3ubuntu1.4) @ questing2026-06-14ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
frr10.0-0.1 ... 9.1-0.1 (59 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
frr8.4.2-1, 8.4.4-1, 8.4.4-1.1~deb12u18.4.4-1.1~deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
frr10.3-310.3-3+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
frr10.3-3 ... 10.5.2-1 (17 versions)10.5.3-1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 29× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 236 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-20 20:15 UTCEPSS rescore
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 19:27 UTCEPSS rescore
  5. 2026-09-17 19:30 UTCEPSS rescore
  6. 2026-09-16 14:08 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-13 16:47 UTCEPSS rescore
  9. 2026-09-12 15:01 UTCEPSS rescore
  10. 2026-09-11 14:52 UTCEPSS rescore
  11. 2026-09-10 09:34 UTCEPSS rescore
  12. 2026-09-08 22:00 UTCEPSS rescore
  13. 2026-09-07 16:01 UTCEPSS rescore
  14. 2026-09-06 13:47 UTCEPSS rescore
  15. 2026-09-06 13:47 UTCEPSS rescore
  16. 2026-09-04 05:06 UTCEPSS rescore
  17. 2026-09-04 01:16 UTCOSV refresh
  18. 2026-09-02 14:11 UTCEPSS rescore
  19. 2026-09-01 13:53 UTCEPSS rescore
  20. 2026-09-01 04:39 UTCEPSS rescore
  21. 2026-09-01 04:39 UTCEPSS rescore
  22. 2026-08-30 19:17 UTCEPSS rescore
  23. 2026-08-30 01:22 UTCEPSS rescore
  24. 2026-08-28 21:41 UTCEPSS rescore
  25. 2026-08-27 14:25 UTCEPSS rescore
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  1. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-24 14:17 UTCEPSS rescore
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-20 22:55 UTCEPSS rescore
  8. 2026-08-19 17:03 UTCEPSS rescore
  9. 2026-08-17 13:48 UTCEG score recompute
  10. 2026-08-17 13:48 UTCVendor advisory
  11. 2026-08-17 13:48 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 05:21 UTCEG score recompute
  15. 2026-08-16 05:21 UTCVendor advisory
  16. 2026-08-16 05:21 UTCGHSA enrichment
  17. 2026-08-16 02:14 UTCEPSS rescore
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 03:49 UTCEG score recompute
  20. 2026-08-14 03:49 UTCVendor advisory
  21. 2026-08-14 03:49 UTCGHSA enrichment
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-12 17:27 UTCEG score recompute
  24. 2026-08-12 17:27 UTCVendor advisory
  25. 2026-08-12 17:27 UTCGHSA enrichment
  26. 2026-08-12 13:50 UTCEPSS rescore
  27. 2026-08-11 13:42 UTCEPSS rescore
  28. 2026-08-11 02:47 UTCEG score recompute
  29. 2026-08-11 02:47 UTCVendor advisory
  30. 2026-08-11 02:47 UTCGHSA enrichment
  31. 2026-08-11 00:00 UTCEPSS rescore
  32. 2026-08-10 02:53 UTCEG score recompute
  33. 2026-08-10 02:53 UTCVendor advisory
  34. 2026-08-10 02:53 UTCGHSA enrichment
  35. 2026-08-09 13:46 UTCEPSS rescore
  36. 2026-08-09 03:00 UTCEG score recompute
  37. 2026-08-09 03:00 UTCVendor advisory
  38. 2026-08-09 03:00 UTCGHSA enrichment
  39. 2026-08-08 16:37 UTCEPSS rescore
  40. 2026-08-08 02:34 UTCEG score recompute
  41. 2026-08-08 02:34 UTCVendor advisory
  42. 2026-08-08 02:34 UTCGHSA enrichment
  43. 2026-08-07 02:41 UTCEG score recompute
  44. 2026-08-07 02:41 UTCVendor advisory
  45. 2026-08-07 02:41 UTCGHSA enrichment
  46. 2026-08-06 13:46 UTCEPSS rescore
  47. 2026-08-05 22:38 UTCEG score recompute
  48. 2026-08-05 22:38 UTCVendor advisory
  49. 2026-08-05 22:38 UTCGHSA enrichment
  50. 2026-08-05 19:17 UTCEPSS rescore
  51. 2026-08-04 15:10 UTCEPSS rescore
  52. 2026-08-03 20:27 UTCEG score recompute
  53. 2026-08-03 20:27 UTCVendor advisory
  54. 2026-08-03 20:27 UTCGHSA enrichment
  55. 2026-08-03 10:36 UTCEPSS rescore
  56. 2026-08-02 05:43 UTCEG score recompute
  57. 2026-08-02 05:43 UTCVendor advisory
  58. 2026-08-02 05:43 UTCGHSA enrichment
  59. 2026-08-02 02:26 UTCEPSS rescore
  60. 2026-07-30 16:27 UTCEPSS rescore
  61. 2026-07-30 01:30 UTCEPSS rescore
  62. 2026-07-28 15:36 UTCEPSS rescore
  63. 2026-07-26 14:54 UTCEPSS rescore
  64. 2026-07-26 14:54 UTCEPSS rescore
  65. 2026-07-25 14:18 UTCEPSS rescore
  66. 2026-07-25 14:17 UTCEPSS rescore
  67. 2026-07-24 14:17 UTCEPSS rescore
  68. 2026-07-23 14:18 UTCEPSS rescore
  69. 2026-07-23 14:18 UTCEPSS rescore
  70. 2026-07-23 03:08 UTCEG score recompute
  71. 2026-07-22 14:08 UTCEPSS rescore
  72. 2026-07-22 14:08 UTCEPSS rescore
  73. 2026-07-21 15:24 UTCEPSS rescore
  74. 2026-07-21 15:24 UTCEPSS rescore
  75. 2026-07-20 17:08 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-28532?
CVE-2026-28532 is a medium vulnerability published on April 30, 2026. FRRouting before 10.5.3 contains an integer overflow vulnerability in seven OSPF Traffic Engineering and Segment Routing TLV parser functions where a uint16t accumulator variable truncates uint32t values returned by the TLV_SIZE() macro, causing the loop termination condition to fail while pointer…
When was CVE-2026-28532 disclosed?
CVE-2026-28532 was first published in the National Vulnerability Database on April 30, 2026, with the most recent update on May 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28532 actively exploited?
CVE-2026-28532 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.5% of all scored CVEs.
What is the CVSS score of CVE-2026-28532?
CVE-2026-28532 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-28532?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28532, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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