CVE-2026-31742

A flaw was found in the Linux kernel. When a console is resized while in an alternate screen mode, the system may fail to properly update its internal buffer for unicode characters. This can lead to an out-of-bounds memory access when the alternate screen mode is exited, potentially causing a system crash (kernel oops) and resulting in a Denial of Service (DoS).

The console/vt layer could retain a stale unicode buffer across alt-screen resize transitions; upstream discards it safely. Red Hat treats this as local TTY memory hygiene. Patch kernels; vt is core.

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.