CVE-2026-45929

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
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

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

ovpn: fix possible use-after-free in ovpn_net_xmit

When building the skb_list in ovpn_net_xmit, skb_share_check will free the original skb if it is shared. The current implementation continues to use the stale skb pointer for subsequent operations:

  • peer lookup,
  • skb_dst_drop (even though all segments produced by skb_gso_segment
will have a dst attached),
  • ovpn_peer_stats_increment_tx.

Fix this by moving the peer lookup and skb_dst_drop before segmentation so that the original skb is still valid when used. Return early if all segments fail skb_share_check and the list ends up empty. Also switch ovpn_peer_stats_increment_tx to use skb_list.next; the next patch fixes the stats logic.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

May 27, 2026

Last Modified

August 5, 2026

Advisory Details (3)

Auto-updated Jun 3, 2026
No patch confirmed yet.
generic

ovpn: fix possible use-after-free in ovpn_net_xmit - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a5ec7baa44ea3a1d6aa0ca31c0ad82edf9affe41
generic

ovpn: fix possible use-after-free in ovpn_net_xmit - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/442915c96a9bff1c7080e2aedabb1c03faa28d81
generic

ovpn: fix possible use-after-free in ovpn_net_xmit - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3e4fbcb4e078915367ba5576cd70d76dbc970f95

Vendor Advisories for CVE-2026-45929(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.18~rc7-1~exp1 (100 versions)6.18.14-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 62× 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 222 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45929?
CVE-2026-45929 is a high vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: ovpn: fix possible use-after-free in ovpnnetxmit When building the skblist in ovpnnetxmit, skbshare_check will free the original skb if it is shared. The current implementation continues to use the stale skb pointer for subsequent…
When was CVE-2026-45929 disclosed?
CVE-2026-45929 was first published in the National Vulnerability Database on May 27, 2026, 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-2026-45929 actively exploited?
CVE-2026-45929 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 94.8% of all scored CVEs.
What is the CVSS score of CVE-2026-45929?
CVE-2026-45929 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45929?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45929, 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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