7.8

CVE-2026-17523: can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet

Undergoing analysis
AliasesUBUNTU-CVE-2026-17523DEBIAN-CVE-2026-17523
Published 27-07-2026Last modified 10-09-2026

Vulnerability summary

CVE-2026-17523 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 5
RHSA-2026:55764RHSA-2026:55765RHSA-2026:61932RHSA-2026:65710RHSA-2026:65711

Timeline

  1. 27-07-2026
    PublishedVulnerability first disclosed.
  2. 10-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.15% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu169 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ c53a6ee88b0a91bd012ef1b7988c0b93dae6f24d, < 79305a826f872fe446c6fbf8450f515053ef6951 | ≥ c53a6ee88b0a91bd012ef1b7988c0b93dae6f24d, < bf74aa86e111aa3b2fbb25db37e3a3fab71b5b68 | 2.6.29
  • linux_kernel≥ 2.6.29.1, < 4.19.226 | ≥ 4.20, < 5.4 | 2.6.29 | 2.6.29:rc2 | 2.6.29:rc3 | 2.6.29:rc4 | 2.6.29:rc5 | 2.6.29:rc6 | 2.6.29:rc7 | 2.6.29:rc8
Debian1 product
  • linux< 5.4.6-1

3 vendors · 172 products

References

5 links