CVE-2024-40909

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-07-12. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

bpf: Fix a potential use-after-free in bpf_link_free()

After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 12, 2024

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

bpf: Fix a potential use-after-free in bpf_link_free() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fa97b8fed9896f1e89cb657513e483a152d4c382
generic

bpf: Fix a potential use-after-free in bpf_link_free() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/91cff53136daeff50816b0baeafd38a6976f6209
generic

bpf: Fix a potential use-after-free in bpf_link_free() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2884dc7d08d98a89d8d65121524bb7533183a63a

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure (6.8.0-1014.16) @ noble2026-05-23ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1013.14~22.04.1) @ jammy2026-05-23ubuntu
ubuntulinux-tools-raspi (6.8.0-1011.12) @ noble2026-05-23ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.8.0-44.44) @ noble2026-05-23ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-44.44.1~22.04.1) @ jammy2026-05-23ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k (6.8.0-1013.14.1) @ noble2026-05-23ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-45.45~22.04.1) @ jammy2026-05-23ubuntu
linuxKernel @ 6.6.35—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.

All Vendor Advisories

(7)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 47× 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 124 total refreshes for this CVE.

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

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

Frequently asked(5)

What is CVE-2024-40909?
CVE-2024-40909 is a high vulnerability published on July 12, 2024. In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpflinkfree() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free…
When was CVE-2024-40909 disclosed?
CVE-2024-40909 was first published in the National Vulnerability Database on July 12, 2024, 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-2024-40909 actively exploited?
CVE-2024-40909 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 80.1% of all scored CVEs.
What is the CVSS score of CVE-2024-40909?
CVE-2024-40909 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2024-40909?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-40909, 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.

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