SB2026091896 - NULL pointer dereference in Linux kernel gadget udc driver
Published: September 18, 2026
Security Bulletin ID
SB2026091896
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) NULL pointer dereference (CVE-ID: CVE-2026-93118)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to an unchecked allocator return in the Aspeed UDC driver's ast_udc_probe() function when initializing endpoint buffers after coherent DMA buffer allocation fails. A local privileged user can cause the driver to dereference a null endpoint buffer during probe to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/4aaad88f857498ed1294f061f0b25d27ae891c55
- https://git.kernel.org/stable/c/6182e708e2e1f55521c8a01d7535630ecc2d7df9
- https://git.kernel.org/stable/c/97cee53a94be3bd4fd8fbed6071bd2f32dad1ab1
- https://git.kernel.org/stable/c/9e6f57107c1886052d4baaa047a2bc3d0e91be5d
- https://git.kernel.org/stable/c/d7ae1a48e70e9c3451b7dc7bc3896c82884bc4df
- https://git.kernel.org/stable/c/ff6e88e29965bd06f640e59acdcf0bbf04a7f55c