Vulnerability · Published Jul 27, 2026 · Assigned by redhat
CVE-2026-17523can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet
High 7.8
In plain English
A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 94.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-core | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-debug | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-devel | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-doc | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-headers | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-modules | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-rt | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-debug-modules | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-modules | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-553.156.1.rt7.497.el8_10 | ALSA-2026:55765 |
| AlmaLinux:8 | kernel-tools | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | perf | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| AlmaLinux:8 | python3-perf | 4.18.0-553.156.1.el8_10 | ALSA-2026:55764 |
| Debian:12 | linux | 5.4.6-1 | DEBIAN-CVE-2026-17523 |
| Debian:13 | linux | 5.4.6-1 | DEBIAN-CVE-2026-17523 |
| Debian:14 | linux | 5.4.6-1 | DEBIAN-CVE-2026-17523 |
| Rocky Linux:8 | kernel | 0:4.18.0-553.156.1.el8_10 | RLSA-2026:55764 |
| Rocky Linux:8 | kernel-rt | 0:4.18.0-553.156.1.rt7.497.el8_10 | RLSA-2026:55765 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-aws-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-aws-6.17 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-azure-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-azure-6.17 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-azure-fde-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-azure-fde-6.17 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-azure-nvidia-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-gcp-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-gcp-6.17 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-hwe-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-nvidia-6.17 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-oem-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-oracle-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-oracle-6.17 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-riscv-6.14 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:24.04:LTS | linux-riscv-6.17 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2026-17523 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2026-17523 |