CVE-2026-17523

HIGH

7.8

CVSS v3

Description

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.

How to fix

Remediation Available

linuxDebian

Fixed in:5.4.6-1CVE-2026-17523

bpftoolRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

bpftoolRed Hat / RHEL

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

bpftool-debuginfoRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

bpftool-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

kernelRed Hat / RHEL

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

kernelRocky

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-abi-stablelistsRocky

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

kernel-abi-stablelistsRed Hat / RHEL

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

kernel-coreRed Hat / RHEL

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

kernel-coreRocky

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debugRed Hat / RHEL

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debugRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

kernel-debug-coreRed Hat / RHEL

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

kernel-debug-coreRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

kernel-debug-debuginfoRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debug-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debug-develRed Hat / RHEL

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debug-develRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debug-modulesRocky

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debug-modulesRed Hat / RHEL

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debug-modules-extraRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

kernel-debug-modules-extraRed Hat / RHEL

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

kernel-debuginfoRed Hat / RHEL

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

kernel-debuginfoRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-372.213.1.el8_6RHSA-2026:65711

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-305.206.1.el8_4RHSA-2026:65710

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

kernel-debuginfo-common-aarch64Red Hat / RHEL

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debuginfo-common-aarch64Rocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

kernel-debuginfo-common-ppc64leRocky

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

kernel-debuginfo-common-ppc64leRed Hat / RHEL

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

Fixed in:0:4.18.0-477.163.1.el8_8RHSA-2026:61932

kernel-debuginfo-common-s390xRed Hat / RHEL

Fixed in:0:4.18.0-553.156.1.el8_10RHSA-2026:55764

This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.15%probability of exploitation in 30 days

4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other vulnerabilities affecting linux, ordered by exploit likelihood.

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2026-31431	Medium	5.5	100%	KEV	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2017-5753	Medium	5.6	94%	-	Fix
CVE-2026-43284	High	7.8	93%	-	Fix
CVE-2019-11478	Medium	5.3	93%	-	Fix
CVE-2026-43500	High	7.8	93%	-	Fix

Common questions

How do I fix CVE-2026-17523?

Published advisories record a fix for 99 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-17523 being actively exploited?

Not that we know of. CVE-2026-17523 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.15% is the estimated probability that it will be exploited in the next 30 days. That is higher than 4% of all scored CVEs.

How severe is CVE-2026-17523?

CVE-2026-17523 has a CVSS v3 base score of 7.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-17523 affect?

Published advisories record a fix for linux (Debian), bpftool (Rocky), bpftool (Red Hat / RHEL), bpftool-debuginfo (Rocky), and 95 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-17523

Markdown

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HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-10.