CVE-2025-21760

HIGHPre-NVD 8.18.2▲
EchelonGraph scoreHIGH confidence

Score elevated to 8.2 because EPSS predicts 33% probability of exploitation within the next 30 days (top 1.8% of all CVEs). the CNA's CVSS baseline 8.1 retained for reference (NVD's own analysis pending). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: cna:linux, epss, ghsa
Trending — 5 sources updated this weekElevated
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 37%CVSS: 8.1Exploit: Elevated riskExposed: 0

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

ndisc: extend RCU protection in ndisc_send_skb()

ndisc_send_skb() can be called without RTNL or RCU held.

Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF.

CVSS v3
8.1
EG Score
8.2(high)
EG Risk
53(Track)
EG Risk 53/100SSVC: 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
Severity82% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
37%
EPSS %ILE
98%
KEV
Not listed

Published

February 27, 2025

Last Modified

August 5, 2026

Advisory Details (10)

Auto-updated Jul 14, 2026
Patch available.
generic Patch Available

[SECURITY] [DLA 4178-1] linux security update

https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
generic Patch Available

[SECURITY] [DLA 4102-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
generic

ndisc: extend RCU protection in ndisc_send_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ed6ae1f325d3c43966ec1b62ac1459e2b8e45640
generic

ndisc: extend RCU protection in ndisc_send_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e24d225e4cb8cf108bde00b76594499b98f0a74d
generic

ndisc: extend RCU protection in ndisc_send_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae38982f521621c216fc2f5182cd091f4734641d
generic

ndisc: extend RCU protection in ndisc_send_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a9319d800b5701e7f5e3fa71a5b7c4831fc20d6d
generic

ndisc: extend RCU protection in ndisc_send_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/789230e5a8c1097301afc802e242c79bc8835c67
generic

ndisc: extend RCU protection in ndisc_send_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4d576202b90b1b95a7c428a80b536f91b8201bcc
generic

ndisc: extend RCU protection in ndisc_send_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/10a1f3fece2f0d23a3a618b72b2b4e6f408ef7d1
generic

ndisc: extend RCU protection in ndisc_send_skb() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/04e05112f10354ffc3bb6cc796d553bab161594c

Vendor Advisories for CVE-2025-21760(2)

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

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-gcp-fips (5.15.0.1083.73) @ jammy2026-07-30ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1083.79) @ jammy2026-07-30ubuntu
ubuntulinux-tools-fips (5.15.0.140.80) @ jammy2026-07-30ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.140.135) @ jammy2026-07-30ubuntu
ubuntulinux-tools-gcp-fips (5.4.0.1149.91) @ focal2026-07-30ubuntu
ubuntulinux-tools-azure-fips (5.4.0.1151.88) @ focal2026-07-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1064 (5.4.0-1064.68) @ focal2026-07-30ubuntu
ubuntulinux-tools-ibm-edge (5.4.0.1092.97~18.04.1) @ bionic2026-07-30ubuntu
ubuntulinux-tools-aws (6.11.0-1014.15) @ oracular2026-07-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt (5.15.0.1037.37) @ jammy2026-07-30ubuntu
ubuntulinux-tools-gke-5.15 (5.15.0.1081.80) @ jammy2026-07-30ubuntu
ubuntulinux-tools-azure-fips (5.15.0.1089.74) @ jammy2026-07-30ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1144.154~18.04.1) @ bionic2026-07-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1050.54) @ jammy2026-07-30ubuntu
ubuntulinux-tools-fips (5.4.0.1120.117) @ focal2026-07-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2028.29) @ noble2026-07-30ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1032.33) @ noble2026-07-30ubuntu
ubuntulinux-tools-aws-lts-20.04 (5.4.0.1146.143) @ focal2026-07-30ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1035.39) @ noble2026-07-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-78.78) @ noble2026-07-30ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1129.160) @ focal2026-07-30ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1084.91~20.04.1) @ focal2026-07-30ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1129.142~18.04.1) @ bionic2026-07-30ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.142.152~20.04.1) @ focal2026-07-30ubuntu
ubuntulinux-tools-iot (5.4.0.1051.49) @ focal2026-07-30ubuntu
ubuntulinux-tools-aws-fips (5.15.0.1084.80) @ jammy2026-07-30ubuntu
ubuntulinux-tools-bluefield (5.4.0.1105.101) @ focal2026-07-30ubuntu
ubuntulinux-tools-oracle-64k (6.11.0-1016.17) @ oracular2026-07-30ubuntu
ubuntulinux-tools-ibm-lts-20.04 (5.4.0.1092.121) @ focal2026-07-30ubuntu
ubuntulinux-tools-azure-nvidia-lts-24.04 (6.8.0-1022.23) @ noble2026-07-30ubuntu
linuxKernel @ 5.4.291—osv

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

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 9× in last 7d / 45× 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 139 total refreshes for this CVE.

  1. 2026-08-07 16:26 UTCEPSS rescore
  2. 2026-08-06 13:46 UTCEPSS rescore
  3. 2026-08-05 19:16 UTCEPSS rescore
  4. 2026-08-05 14:03 UTCEG score recompute▲ 0.40
  5. 2026-08-05 14:03 UTCVendor advisory
  6. 2026-08-05 14:03 UTCGHSA enrichment
  7. 2026-08-05 12:31 UTCMITRE cvelistV5CVSS v3 → 8.1
  8. 2026-08-04 15:09 UTCEPSS rescore
  9. 2026-08-02 02:25 UTCEPSS rescore
  10. 2026-07-30 16:27 UTCEPSS rescore
  11. 2026-07-30 07:21 UTCEG score recompute
  12. 2026-07-30 07:21 UTCVendor advisory
  13. 2026-07-30 07:21 UTCGHSA enrichment
  14. 2026-07-30 06:24 UTCNVD updateCVSS v3 → 7.8
  15. 2026-07-30 06:18 UTCMITRE cvelistV5CVSS v3 → 8.1
  16. 2026-07-30 01:29 UTCEPSS rescore
  17. 2026-07-28 15:35 UTCEPSS rescore
  18. 2026-07-28 01:24 UTCOSV refresh
  19. 2026-07-27 14:12 UTCEPSS rescore
  20. 2026-07-26 14:53 UTCEPSS rescore
  21. 2026-07-25 14:17 UTCEPSS rescore
  22. 2026-07-24 14:17 UTCEPSS rescore
  23. 2026-07-23 14:17 UTCEPSS rescore
  24. 2026-07-23 02:50 UTCEG score recompute
  25. 2026-07-22 14:07 UTCEPSS rescore
Show 75 more
  1. 2026-07-22 14:07 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:07 UTCEPSS rescore
  4. 2026-07-19 14:30 UTCEPSS rescore
  5. 2026-07-19 14:30 UTCEPSS rescore
  6. 2026-07-19 02:28 UTCEPSS rescore
  7. 2026-07-19 02:28 UTCEPSS rescore
  8. 2026-07-18 10:03 UTCEPSS rescore
  9. 2026-07-16 17:02 UTCEPSS rescore
  10. 2026-07-15 16:57 UTCEPSS rescore
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 01:59 UTCEPSS rescore
  13. 2026-07-13 22:29 UTCEPSS rescore
  14. 2026-07-13 22:29 UTCEPSS rescore
  15. 2026-07-12 05:46 UTCEPSS rescore
  16. 2026-07-12 05:46 UTCEPSS rescore
  17. 2026-07-11 08:27 UTCEPSS rescore
  18. 2026-07-11 08:26 UTCEPSS rescore
  19. 2026-07-10 17:41 UTCOSV refresh
  20. 2026-07-09 19:09 UTCEPSS rescore
  21. 2026-07-08 15:14 UTCEPSS rescore
  22. 2026-07-07 13:45 UTCEPSS rescore
  23. 2026-07-06 16:26 UTCEPSS rescore
  24. 2026-07-05 02:30 UTCEPSS rescore
  25. 2026-07-04 06:30 UTCEPSS rescore
  26. 2026-07-01 15:06 UTCEPSS rescore
  27. 2026-06-30 23:21 UTCEPSS rescore
  28. 2026-06-30 23:21 UTCEPSS rescore
  29. 2026-06-29 14:06 UTCEPSS rescore
  30. 2026-06-28 04:55 UTCEPSS rescore
  31. 2026-06-28 04:55 UTCEPSS rescore
  32. 2026-06-27 03:08 UTCEPSS rescore
  33. 2026-06-27 03:08 UTCEPSS rescore
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 13:49 UTCEPSS rescore
  36. 2026-06-24 14:04 UTCEPSS rescore
  37. 2026-06-24 14:04 UTCEPSS rescore
  38. 2026-06-23 21:32 UTCEPSS rescore
  39. 2026-06-23 21:32 UTCEPSS rescore
  40. 2026-06-22 01:37 UTCOSV refresh
  41. 2026-06-21 14:56 UTCEPSS rescore
  42. 2026-06-21 14:56 UTCEPSS rescore
  43. 2026-06-19 19:25 UTCEPSS rescore
  44. 2026-06-19 19:25 UTCEPSS rescore
  45. 2026-06-18 17:52 UTCEPSS rescore
  46. 2026-06-18 17:52 UTCEPSS rescore
  47. 2026-06-17 17:52 UTCEPSS rescore
  48. 2026-06-16 17:52 UTCEPSS rescore
  49. 2026-06-16 17:52 UTCEPSS rescore
  50. 2026-06-15 17:48 UTCEPSS rescore
  51. 2026-06-14 23:17 UTCEPSS rescore
  52. 2026-06-13 22:59 UTCEPSS rescore
  53. 2026-06-12 23:11 UTCEPSS rescore
  54. 2026-06-11 13:59 UTCEPSS rescore
  55. 2026-06-10 22:18 UTCEPSS rescore
  56. 2026-06-10 13:22 UTCEPSS rescore
  57. 2026-06-08 14:16 UTCEPSS rescore
  58. 2026-06-08 14:16 UTCEPSS rescore
  59. 2026-06-07 15:24 UTCEPSS rescore
  60. 2026-06-07 15:24 UTCEPSS rescore
  61. 2026-06-06 13:47 UTCEPSS rescore
  62. 2026-06-06 13:47 UTCEPSS rescore
  63. 2026-06-05 22:46 UTCEPSS rescore
  64. 2026-06-05 22:46 UTCEPSS rescore
  65. 2026-06-05 06:10 UTCEPSS rescore
  66. 2026-06-05 06:10 UTCEPSS rescore
  67. 2026-06-04 13:11 UTCEPSS rescore
  68. 2026-06-04 13:11 UTCEPSS rescore
  69. 2026-06-03 18:09 UTCOSV refresh
  70. 2026-06-02 20:12 UTCEPSS rescore
  71. 2026-06-02 20:12 UTCEPSS rescore
  72. 2026-06-01 13:51 UTCEPSS rescore
  73. 2026-06-01 13:51 UTCEPSS rescore
  74. 2026-05-31 22:30 UTCEPSS rescore
  75. 2026-05-31 22:30 UTCEPSS rescore

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-21760?
CVE-2025-21760 is a high vulnerability published on February 27, 2025. In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU protection in ndiscsendskb() ndiscsendskb() can be called without RTNL or RCU held. Acquire rcureadlock() earlier, so that we can use devnetrcu() and avoid a potential UAF.
When was CVE-2025-21760 disclosed?
CVE-2025-21760 was first published in the National Vulnerability Database on February 27, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-21760 actively exploited?
CVE-2025-21760 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37% probability of exploitation in the next 30 days, which ranks it in the top 1.6% of all scored CVEs.
What is the CVSS score of CVE-2025-21760?
CVE-2025-21760 has a CVSS v4.0 base score of 8.1 (CNA self-assessment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.2.
How do I remediate CVE-2025-21760?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21760, 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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