SB20260815300 - Division by zero in Linux kernel dsa sja1105 driver
Published: August 15, 2026
Security Bulletin ID
SB20260815300
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Division by zero (CVE-ID: CVE-2026-72414)
CWE-ID: CWE-369 - Divide By Zero
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to division by zero in future_base_time() in the sja1105 PTP perout handling code when processing a user-provided period value that becomes zero after conversion to SJA1105 clock ticks. A local user can provide a very small period value to trigger a kernel crash and cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/09efce96c909dff1a9317ec3714b7ddb4751b7af
- https://git.kernel.org/stable/c/201dcbbfb27f3db85c8cf125a75f3164a83ceb32
- https://git.kernel.org/stable/c/28d13a89a211cc07caeef32069eaa847131b7351
- https://git.kernel.org/stable/c/410629528067029096dba7ad7bc49e4a5e92708d
- https://git.kernel.org/stable/c/9952291db7125b8a62bf19800b93dcac81fc70c0
- https://git.kernel.org/stable/c/aaf446099ca497c8d9a8e511fedf5d0e547bf8ec
- https://git.kernel.org/stable/c/aee5836273b07b439fb245fb43930664d8b78518
- https://git.kernel.org/stable/c/fc62bfd30d30af07356f0f7121c826e1e753582f