CVE-2026-23146

NVD 0.05.5▲
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-02-14. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 0%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

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

Bluetooth: hci_uart: fix null-ptr-deref in hci_uart_write_work

hci_uart_set_proto() sets HCI_UART_PROTO_INIT before calling hci_uart_register_dev(), which calls proto->open() to initialize hu->priv. However, if a TTY write wakeup occurs during this window, hci_uart_tx_wakeup() may schedule write_work before hu->priv is initialized, leading to a NULL pointer dereference in hci_uart_write_work() when proto->dequeue() accesses hu->priv.

The race condition is:

CPU0 CPU1 ---- ---- hci_uart_set_proto() set_bit(HCI_UART_PROTO_INIT) hci_uart_register_dev() tty write wakeup hci_uart_tty_wakeup() hci_uart_tx_wakeup() schedule_work(&hu->write_work) proto->open(hu) // initializes hu->priv hci_uart_write_work() hci_uart_dequeue() proto->dequeue(hu) // accesses hu->priv (NULL!)

Fix this by moving set_bit(HCI_UART_PROTO_INIT) after proto->open() succeeds, ensuring hu->priv is initialized before any work can be scheduled.

CVSS v3
—
EG Score
5.5(medium)
EPSS
2.5%
KEV
Not listed

Published

February 14, 2026

Last Modified

June 11, 2026

References (7)

Vendor Advisories for CVE-2026-23146(2)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.176.161) @ jammy2026-06-12ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1057.57) @ jammy2026-06-12ubuntu
ubuntulinux-tools-realtime-5.15 (5.15.0.1104.108) @ jammy2026-06-12ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.176.186~20.04.1) @ focal2026-06-12ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1110.95) @ jammy2026-06-12ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1099.97) @ jammy2026-06-12ubuntu
ubuntulinux-tools-ibm-5.15 (5.15.0.1099.95) @ jammy2026-06-12ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1110.119~20.04.1) @ focal2026-06-12ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1070 (5.15.0-1070.74) @ jammy2026-06-12ubuntu
ubuntulinux-virtual-6.8 (6.8.0-117.117) @ noble2026-06-12ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1054.57.1) @ noble2026-06-12ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-116.116+fips1) @ noble2026-06-12ubuntu
ubuntulinux-tools-nvidia-hwe-22.04-edge (6.8.0-1054.57~22.04.1) @ jammy2026-06-12ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1106.115~20.04.1) @ focal2026-06-12ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1024.24) @ noble2026-06-12ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1056.62) @ noble2026-06-12ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1105.95) @ jammy2026-06-12ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1059.65+fips1) @ noble2026-06-12ubuntu
ubuntulinux-tools-kvm-5.15 (5.15.0.1097.93) @ jammy2026-06-12ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1057.57~20.04.1) @ focal2026-06-12ubuntu
redhatkernel-0:5.14.0-611.5.1.el9_72025-11-11redhat
redhatkernel-0:6.12.0-124.8.1.el10_12025-11-11redhat

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

(20)

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 8× in last 7d / 40× 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.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:00 UTCEPSS rescore
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  11. 2026-07-07 13:46 UTCEPSS rescore
  12. 2026-07-06 16:27 UTCEPSS rescore
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  14. 2026-07-06 02:23 UTCEPSS rescore
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  16. 2026-07-04 06:31 UTCEPSS rescore
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  18. 2026-07-01 15:06 UTCEPSS rescore
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  20. 2026-06-30 23:22 UTCEPSS rescore
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  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-29 13:02 UTCOSV refresh
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 14:07 UTCEPSS rescore
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  1. 2026-06-28 04:56 UTCEPSS rescore
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  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-25 13:49 UTCEPSS rescore
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  6. 2026-06-22 14:25 UTCEPSS rescore
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  8. 2026-06-21 14:56 UTCEPSS rescore
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  10. 2026-06-19 19:25 UTCEPSS rescore
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  12. 2026-06-18 17:52 UTCEPSS rescore
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  15. 2026-06-16 17:52 UTCEPSS rescore
  16. 2026-06-15 17:48 UTCEPSS rescore
  17. 2026-06-14 23:18 UTCMITRE cvelistV5
  18. 2026-06-14 23:18 UTCEPSS rescore
  19. 2026-06-13 23:00 UTCEPSS rescore
  20. 2026-06-13 23:00 UTCEPSS rescore
  21. 2026-06-12 23:12 UTCEPSS rescore
  22. 2026-06-12 03:39 UTCEG score recompute
  23. 2026-06-12 03:39 UTCVendor advisory
  24. 2026-06-12 03:38 UTCGHSA enrichment
  25. 2026-06-11 14:00 UTCEPSS rescore
  26. 2026-06-10 22:18 UTCEPSS rescore
  27. 2026-06-10 21:31 UTCEG score recompute
  28. 2026-06-10 21:31 UTCVendor advisory
  29. 2026-06-10 21:31 UTCGHSA enrichment
  30. 2026-06-10 13:22 UTCEPSS rescore
  31. 2026-06-09 19:59 UTCEG score recompute
  32. 2026-06-09 19:59 UTCVendor advisory
  33. 2026-06-09 19:58 UTCGHSA enrichment
  34. 2026-06-08 14:17 UTCEPSS rescore
  35. 2026-06-08 14:17 UTCEPSS rescore
  36. 2026-06-07 18:01 UTCEG score recompute
  37. 2026-06-07 18:01 UTCVendor advisory
  38. 2026-06-07 18:01 UTCGHSA enrichment
  39. 2026-06-07 15:25 UTCEPSS rescore
  40. 2026-06-07 15:24 UTCEPSS rescore
  41. 2026-06-06 13:47 UTCEPSS rescore
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  44. 2026-06-05 22:47 UTCEPSS rescore
  45. 2026-06-05 06:10 UTCEPSS rescore
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  47. 2026-06-04 13:12 UTCEPSS rescore
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  50. 2026-06-02 20:13 UTCEPSS rescore
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  52. 2026-06-01 13:51 UTCEPSS rescore
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  59. 2026-05-31 00:16 UTCEPSS rescore
  60. 2026-05-29 13:53 UTCEG score recompute
  61. 2026-05-29 13:53 UTCVendor advisory
  62. 2026-05-29 13:53 UTCGHSA enrichment
  63. 2026-05-29 13:44 UTCEPSS rescore
  64. 2026-05-29 13:44 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2026-23146?
CVE-2026-23146 is a publicly disclosed vulnerability published on February 14, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hciuart: fix null-ptr-deref in hciuartwritework hciuartsetproto() sets HCIUARTPROTOINIT before calling hciuartregister_dev(), which calls proto->open() to initialize hu->priv. However, if a TTY write wakeup occurs during…
When was CVE-2026-23146 disclosed?
CVE-2026-23146 was first published in the National Vulnerability Database on February 14, 2026, with the most recent update on June 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23146 actively exploited?
CVE-2026-23146 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2026-23146?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23146, 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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