An issue was discovered in drm_load_edid_firmware in drivers/gpu/drm/drm_edid_load.c in the Linux kernel through 5.1.5. There is an unchecked kstrdup of fwstr, which might allow an attacker to cause a denial of service (NULL pointer dereference and system crash).

References

• https://nvd.nist.gov/vuln/detail/CVE-2019-12382
• https://cgit.freedesktop.org/drm/drm-misc/commit/?id=9f1f1a2dab38d4ce87a13565cf4dc1b73bef3a5f
• https://lkml.org/lkml/2019/5/24/843
• http://www.securityfocus.com/bid/108474
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J36BIJTKEPUOZKJNHQBUZA47RQONUKOI
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KLGWJKLMTBBB53D5QLS4HOY2EH246WBE
• https://lore.kernel.org/lkml/87o93u7d3s.fsf%40intel.com
• https://salsa.debian.org/kernel-team/kernel-sec/blob/master/retired/CVE-2019-12382
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html
• http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html