CVE-2026-17523

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-27. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released 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:

can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet

This patch switches the timer to HRTIMER_MODE_SOFT, which executed the timer callback in softirq context and removes the hrtimer_tasklet.

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
4%
KEV
Not listed

Published

July 27, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Jul 27, 2026
Patch available. Sources: redhat, github_commit.
github_commit

commit bf74aa86e111 (torvalds/linux)

Fix landed in torvalds/linux commit bf74aa86e111 — awaiting tagged release

https://github.com/torvalds/linux/commit/bf74aa86e111aa3b2fbb25db37e3a3fab71b5b68
redhat

2507407 – (CVE-2026-17523) CVE-2026-17523 kernel: can:bcm: arbitrary kernel code execution leading to escalate privileges

https://bugzilla.redhat.com/show_bug.cgi?id=2507407
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-17523

Vendor Advisories for CVE-2026-17523(6)

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

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatkernel-0:4.18.0-305.206.1.el8_42026-09-09redhat
redhatkernel-0:4.18.0-372.213.1.el8_62026-09-09redhat
redhatkernel-0:4.18.0-477.163.1.el8_82026-09-01redhat
redhatkernel-rt-0:4.18.0-553.156.1.rt7.497.el8_102026-08-17redhat
redhatkernel-0:4.18.0-553.156.1.el8_102026-08-17redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.4.6-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.4.6-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.4.6-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 44× in last 7d / 156× 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 229 total refreshes for this CVE.

  1. 2026-09-11 15:54 UTCEG score recompute
  2. 2026-09-11 15:54 UTCVendor advisory
  3. 2026-09-11 15:54 UTCGHSA enrichment
  4. 2026-09-11 14:52 UTCEPSS rescore
  5. 2026-09-11 09:36 UTCEPSS rescore
  6. 2026-09-11 02:02 UTCVendor advisory
  7. 2026-09-11 02:02 UTCGHSA enrichment
  8. 2026-09-10 14:22 UTCEG score recompute
  9. 2026-09-10 14:22 UTCVendor advisory
  10. 2026-09-10 14:22 UTCGHSA enrichment
  11. 2026-09-10 13:42 UTCEG score recompute
  12. 2026-09-10 13:42 UTCVendor advisory
  13. 2026-09-10 13:41 UTCGHSA enrichment
  14. 2026-09-10 09:34 UTCEPSS rescore
  15. 2026-09-10 06:35 UTCEG score recompute
  16. 2026-09-10 06:35 UTCVendor advisory
  17. 2026-09-10 06:35 UTCGHSA enrichment
  18. 2026-09-10 05:56 UTCEG score recompute
  19. 2026-09-10 05:56 UTCVendor advisory
  20. 2026-09-10 05:56 UTCGHSA enrichment
  21. 2026-09-10 05:54 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  22. 2026-09-09 08:21 UTCVendor advisory
  23. 2026-09-09 08:21 UTCGHSA enrichment
  24. 2026-09-09 08:20 UTCNVD update
  25. 2026-09-09 07:38 UTCEG score recompute
Show 75 more
  1. 2026-09-09 07:38 UTCVendor advisory
  2. 2026-09-09 07:38 UTCGHSA enrichment
  3. 2026-09-09 07:38 UTCMITRE cvelistV5
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-07 21:06 UTCEG score recompute
  6. 2026-09-07 21:06 UTCVendor advisory
  7. 2026-09-07 21:06 UTCGHSA enrichment
  8. 2026-09-07 16:01 UTCEPSS rescore
  9. 2026-09-06 23:46 UTCEG score recompute
  10. 2026-09-06 23:46 UTCVendor advisory
  11. 2026-09-06 23:45 UTCGHSA enrichment
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-06 07:49 UTCVendor advisory
  14. 2026-09-06 07:49 UTCGHSA enrichment
  15. 2026-09-05 19:16 UTCEG score recompute
  16. 2026-09-05 19:16 UTCVendor advisory
  17. 2026-09-05 19:16 UTCGHSA enrichment
  18. 2026-09-05 05:49 UTCVendor advisory
  19. 2026-09-05 05:49 UTCGHSA enrichment
  20. 2026-09-04 12:33 UTCEG score recompute
  21. 2026-09-04 12:33 UTCVendor advisory
  22. 2026-09-04 12:33 UTCGHSA enrichment
  23. 2026-09-04 05:06 UTCEPSS rescore
  24. 2026-09-02 14:11 UTCEPSS rescore
  25. 2026-09-01 23:01 UTCEG score recompute
  26. 2026-09-01 23:01 UTCVendor advisory
  27. 2026-09-01 23:01 UTCGHSA enrichment
  28. 2026-09-01 13:53 UTCEPSS rescore
  29. 2026-09-01 10:36 UTCEG score recompute
  30. 2026-09-01 10:36 UTCVendor advisory
  31. 2026-09-01 10:36 UTCGHSA enrichment
  32. 2026-09-01 09:51 UTCEG score recompute
  33. 2026-09-01 09:51 UTCVendor advisory
  34. 2026-09-01 09:50 UTCGHSA enrichment
  35. 2026-09-01 04:39 UTCEPSS rescore
  36. 2026-08-30 22:59 UTCEG score recompute
  37. 2026-08-30 22:59 UTCVendor advisory
  38. 2026-08-30 22:59 UTCGHSA enrichment
  39. 2026-08-30 19:17 UTCEPSS rescore
  40. 2026-08-30 11:28 UTCEG score recompute
  41. 2026-08-30 11:28 UTCVendor advisory
  42. 2026-08-30 11:28 UTCGHSA enrichment
  43. 2026-08-30 01:22 UTCEPSS rescore
  44. 2026-08-29 23:56 UTCEG score recompute
  45. 2026-08-29 23:56 UTCVendor advisory
  46. 2026-08-29 23:56 UTCGHSA enrichment
  47. 2026-08-28 21:41 UTCEPSS rescore
  48. 2026-08-28 01:27 UTCEG score recompute
  49. 2026-08-28 01:27 UTCVendor advisory
  50. 2026-08-28 01:27 UTCGHSA enrichment
  51. 2026-08-27 14:25 UTCEPSS rescore
  52. 2026-08-27 12:42 UTCVendor advisory
  53. 2026-08-27 12:42 UTCGHSA enrichment
  54. 2026-08-27 01:10 UTCEG score recompute
  55. 2026-08-27 01:10 UTCVendor advisory
  56. 2026-08-27 01:10 UTCGHSA enrichment
  57. 2026-08-26 14:46 UTCEPSS rescore
  58. 2026-08-26 13:39 UTCEG score recompute
  59. 2026-08-26 13:39 UTCVendor advisory
  60. 2026-08-26 13:39 UTCGHSA enrichment
  61. 2026-08-26 01:55 UTCVendor advisory
  62. 2026-08-26 01:55 UTCGHSA enrichment
  63. 2026-08-25 14:24 UTCEG score recompute
  64. 2026-08-25 14:24 UTCVendor advisory
  65. 2026-08-25 14:24 UTCGHSA enrichment
  66. 2026-08-25 13:48 UTCEPSS rescore
  67. 2026-08-25 02:51 UTCVendor advisory
  68. 2026-08-25 02:51 UTCGHSA enrichment
  69. 2026-08-24 15:19 UTCEG score recompute
  70. 2026-08-24 15:19 UTCVendor advisory
  71. 2026-08-24 15:19 UTCGHSA enrichment
  72. 2026-08-24 03:47 UTCVendor advisory
  73. 2026-08-24 03:47 UTCGHSA enrichment
  74. 2026-08-23 16:16 UTCVendor advisory
  75. 2026-08-23 16:16 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-17523?
CVE-2026-17523 is a high vulnerability published on July 27, 2026. In the Linux kernel, the following vulnerability has been resolved: can: bcm: switch timer to HRTIMERMODESOFT and remove hrtimer_tasklet This patch switches the timer to HRTIMERMODESOFT, which executed the timer callback in softirq context and removes the hrtimer_tasklet.
When was CVE-2026-17523 disclosed?
CVE-2026-17523 was first published in the National Vulnerability Database on July 27, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17523 actively exploited?
CVE-2026-17523 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 95.8% of all scored CVEs.
What is the CVSS score of CVE-2026-17523?
CVE-2026-17523 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-17523?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-17523, 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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