NULL pointer dereference in Linux kernel - CVE-2026-98416
Published: October 15, 2026
Vulnerability identifier: #VU155909
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98416
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in k3_udma_glue_release_rx_chn() in the Linux kernel TI K3 UDMA glue driver when handling a receive-channel request after memory allocation fails. A local user can trigger the affected cleanup path to cause a denial of service.
The failure occurs when devm_kcalloc() cannot allocate the receive-channel flow array and cleanup subsequently calls k3_udma_glue_release_rx_flow().
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98416
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/0294b6dd515256c03ea2dbf508ddd3826d788579
- https://git.kernel.org/stable/c/5a6cb4d387eebf7d32a6ed3fcd39f94bf38bd134
- https://git.kernel.org/stable/c/5b2d92b7b177226e1dca2e80dc8369131276c2a4
- https://git.kernel.org/stable/c/89f5414660724bb562db4ac74665da16d4a57d99
- https://git.kernel.org/stable/c/967612574c542dec71f820a6eb16dea80dd187a1
- https://git.kernel.org/stable/c/b14e6c52872556de2d6c137531e0ce85085c10ed
- https://git.kernel.org/stable/c/b2985956e06632939bee47cee13bccd78ad7c3a1
- https://git.kernel.org/stable/c/b51ed7885ab0e8ecad765adc13b465cb1498cdc9