A flaw was found in the kernel. An unprivileged local user can exploit this vulnerability to execute arbitrary code within the kernel, which leads to a local privilege escalation (LPE). This allows the attacker to gain root privileges and take full control of the affected system.
CVE-2026-17523
HIGHPre-NVD 7.87.8—Trending — 3 sources updated this week
EchelonGraph scoreHIGH 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: ghsa, secondary
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.8
- EG Score
- 7.8(high)
- 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 computedSeverity78% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
Published
July 27, 2026
Last Modified
July 27, 2026
Advisory Details (3)
Auto-updated Jul 27, 2026Patch 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/bf74aa86e111aa3b2fbb25db37e3a3fab71b5b68redhat
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=2507407Vendor Advisories for CVE-2026-17523(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 7× 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.
- 2026-07-27 15:22 UTCEG score recompute
- 2026-07-27 15:22 UTCGHSA enrichment
- 2026-07-27 15:00 UTCEG score recompute
- 2026-07-27 14:59 UTCGHSA enrichment
- 2026-07-27 10:23 UTCEG score recompute
- 2026-07-27 10:12 UTCEG score recompute
- 2026-07-27 10:12 UTCMITRE cvelistV5first tracked
Frequently asked(4)
What is CVE-2026-17523?
CVE-2026-17523 is a high vulnerability published on July 27, 2026. A flaw was found in the kernel. An unprivileged local user can exploit this vulnerability to execute arbitrary code within the kernel, which leads to a local privilege escalation (LPE). This allows the attacker to gain root privileges and take full control of the affected system.
When was CVE-2026-17523 disclosed?
CVE-2026-17523 was first published in the National Vulnerability Database on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
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
Explore the affected products and dependency analysis for CVE-2026-17523
Is Your Infrastructure Affected by CVE-2026-17523?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.