In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Check for tg ops in dce110_set_avmute Some older DCE timing generators do not implement is_tg_enabled in their ops table. Calling it unconditionally when waiting for AV mute frames causes a NULL pointer dereference on Southern Islands dGPUs when turning the display off over HDMI. Check that tg and the required ops exist before waiting for frames. (cherry picked from commit 2686a0c0aaa07bec2e24131835cf27b5fd4935a5)

A flaw was found in the Linux kernel's AMD display (drm/amd/display) driver. When a user turns off the display over HDMI on systems with older DCE timing generators, the driver attempts to call a function (is_tg_enabled) that may not be implemented. This unconditional call can lead to a NULL pointer dereference, resulting in a system crash and a Denial of Service (DoS).

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Fix deferred kernel Red Hat Enterprise Linux 7 Fix deferred kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-74732 https://nvd.nist.gov/vuln/detail/CVE-2026-74732 https://lore.kernel.org/linux-cve-announce/2026082242-CVE-2026-74732-b896@gregkh/T