{"id":"CVE-2022-49532","summary":"drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes\n\ndrm_cvt_mode may return NULL and we should check it.\n\nThis bug is found by syzkaller:\n\nFAULT_INJECTION stacktrace:\n[  168.567394] FAULT_INJECTION: forcing a failure.\nname failslab, interval 1, probability 0, space 0, times 1\n[  168.567403] CPU: 1 PID: 6425 Comm: syz Kdump: loaded Not tainted 4.19.90-vhulk2201.1.0.h1035.kasan.eulerosv2r10.aarch64 #1\n[  168.567406] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[  168.567408] Call trace:\n[  168.567414]  dump_backtrace+0x0/0x310\n[  168.567418]  show_stack+0x28/0x38\n[  168.567423]  dump_stack+0xec/0x15c\n[  168.567427]  should_fail+0x3ac/0x3d0\n[  168.567437]  __should_failslab+0xb8/0x120\n[  168.567441]  should_failslab+0x28/0xc0\n[  168.567445]  kmem_cache_alloc_trace+0x50/0x640\n[  168.567454]  drm_mode_create+0x40/0x90\n[  168.567458]  drm_cvt_mode+0x48/0xc78\n[  168.567477]  virtio_gpu_conn_get_modes+0xa8/0x140 [virtio_gpu]\n[  168.567485]  drm_helper_probe_single_connector_modes+0x3a4/0xd80\n[  168.567492]  drm_mode_getconnector+0x2e0/0xa70\n[  168.567496]  drm_ioctl_kernel+0x11c/0x1d8\n[  168.567514]  drm_ioctl+0x558/0x6d0\n[  168.567522]  do_vfs_ioctl+0x160/0xf30\n[  168.567525]  ksys_ioctl+0x98/0xd8\n[  168.567530]  __arm64_sys_ioctl+0x50/0xc8\n[  168.567536]  el0_svc_common+0xc8/0x320\n[  168.567540]  el0_svc_handler+0xf8/0x160\n[  168.567544]  el0_svc+0x10/0x218\n\nKASAN stacktrace:\n[  168.567561] BUG: KASAN: null-ptr-deref in virtio_gpu_conn_get_modes+0xb4/0x140 [virtio_gpu]\n[  168.567565] Read of size 4 at addr 0000000000000054 by task syz/6425\n[  168.567566]\n[  168.567571] CPU: 1 PID: 6425 Comm: syz Kdump: loaded Not tainted 4.19.90-vhulk2201.1.0.h1035.kasan.eulerosv2r10.aarch64 #1\n[  168.567573] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[  168.567575] Call trace:\n[  168.567578]  dump_backtrace+0x0/0x310\n[  168.567582]  show_stack+0x28/0x38\n[  168.567586]  dump_stack+0xec/0x15c\n[  168.567591]  kasan_report+0x244/0x2f0\n[  168.567594]  __asan_load4+0x58/0xb0\n[  168.567607]  virtio_gpu_conn_get_modes+0xb4/0x140 [virtio_gpu]\n[  168.567612]  drm_helper_probe_single_connector_modes+0x3a4/0xd80\n[  168.567617]  drm_mode_getconnector+0x2e0/0xa70\n[  168.567621]  drm_ioctl_kernel+0x11c/0x1d8\n[  168.567624]  drm_ioctl+0x558/0x6d0\n[  168.567628]  do_vfs_ioctl+0x160/0xf30\n[  168.567632]  ksys_ioctl+0x98/0xd8\n[  168.567636]  __arm64_sys_ioctl+0x50/0xc8\n[  168.567641]  el0_svc_common+0xc8/0x320\n[  168.567645]  el0_svc_handler+0xf8/0x160\n[  168.567649]  el0_svc+0x10/0x218","modified":"2026-04-02T08:27:41.762931Z","published":"2025-02-26T02:13:52.013Z","related":["SUSE-SU-2025:1027-1","SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1194-1","SUSE-SU-2025:1241-1","SUSE-SU-2025:1263-1","SUSE-SU-2025:1293-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49532.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0f8bc147a963686b7351aa35d1701124ffacac08"},{"type":"WEB","url":"https://git.kernel.org/stable/c/194d250cdc4a40ccbd179afd522a9e9846957402"},{"type":"WEB","url":"https://git.kernel.org/stable/c/32e10aabc287f09a148ff759bb9ce70b01b0012c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/848dd072744ea662ab3097e3c8282bee552df218"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c51d00472fa54b9b05c17789ed665c17adf3a25d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e0828456578cc8ba0a69147f7ae3428392eec287"},{"type":"WEB","url":"https://git.kernel.org/stable/c/edafcad84c4134ebec4bc24b29ca4497a1184eea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f85cb059fad03a3b33a50023be91e944bb065ae8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fadc626cae99aaa1325094edc6a9e2b883f3e562"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49532.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49532"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"dc5698e80cf724770283e10414054662bdf6ccfa"},{"fixed":"e0828456578cc8ba0a69147f7ae3428392eec287"},{"fixed":"848dd072744ea662ab3097e3c8282bee552df218"},{"fixed":"edafcad84c4134ebec4bc24b29ca4497a1184eea"},{"fixed":"f85cb059fad03a3b33a50023be91e944bb065ae8"},{"fixed":"fadc626cae99aaa1325094edc6a9e2b883f3e562"},{"fixed":"32e10aabc287f09a148ff759bb9ce70b01b0012c"},{"fixed":"c51d00472fa54b9b05c17789ed665c17adf3a25d"},{"fixed":"0f8bc147a963686b7351aa35d1701124ffacac08"},{"fixed":"194d250cdc4a40ccbd179afd522a9e9846957402"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49532.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}