SB2026100724 - Use-after-free in Linux kernel dma driver
Published: October 7, 2026
Security Bulletin ID
SB2026100724
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-98343)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a use-after-free read in the kernel.
The vulnerability exists due to use-after-free in dma_chan_put() and dma_release_channel() when releasing a DMA channel drops the last reference to its device and frees the device and its channels. A local user can trigger DMA channel release to trigger a use-after-free read in the kernel.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/02bd02c585293634b213b142cba63cbf77891f6b
- https://git.kernel.org/stable/c/07eb075b60d565a5e465a1945a80cc62807492ad
- https://git.kernel.org/stable/c/6cf31716b77a71c0d634106f4f3951377b8dc6dc
- https://git.kernel.org/stable/c/855187a88bdf762c46b6849307597e3e02bfc1d9
- https://git.kernel.org/stable/c/9319dd64d5cdef851841c091f30424faa2284c31
- https://git.kernel.org/stable/c/b92c502595336a3cc5bb7a060170891366745a5d
- https://git.kernel.org/stable/c/c9780b601438137494b407eb4301bb3de2587ac9
- https://git.kernel.org/stable/c/e873c74132f0c5f1452816cd9bb26208f0bba1e1