CVE-2026-90051
kernel: tcp: reject non zerocopy devmem tx
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 13, 2026
Description
A flaw was found in the Linux kernel's TCP networking component. A local attacker could craft a malicious io_uring request with dmabuf_id and zero-copy flags, but without the necessary binding. This improper handling of non-zero-copy devmem transmit could lead to the breaking of internal data structure invariants, potentially causing system instability or a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-1288 · Improper Validation of Consistency within Input