{"id":"CVE-2022-49532","state":"PUBLISHED","title":"drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes","description":"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","publishedAt":"2025-02-26T02:13:52.013Z","updatedAt":"2026-05-11T19:01:45.415Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"e0828456578cc8ba0a69147f7ae3428392eec287","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"848dd072744ea662ab3097e3c8282bee552df218","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"edafcad84c4134ebec4bc24b29ca4497a1184eea","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"f85cb059fad03a3b33a50023be91e944bb065ae8","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"fadc626cae99aaa1325094edc6a9e2b883f3e562","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"32e10aabc287f09a148ff759bb9ce70b01b0012c","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"c51d00472fa54b9b05c17789ed665c17adf3a25d","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"0f8bc147a963686b7351aa35d1701124ffacac08","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"194d250cdc4a40ccbd179afd522a9e9846957402","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/virtio/virtgpu_display.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"4.9.318","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.283","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.247","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.198","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.121","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.46","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/virtio/virtgpu_display.c"]}],"references":["https://git.kernel.org/stable/c/e0828456578cc8ba0a69147f7ae3428392eec287","https://git.kernel.org/stable/c/848dd072744ea662ab3097e3c8282bee552df218","https://git.kernel.org/stable/c/edafcad84c4134ebec4bc24b29ca4497a1184eea","https://git.kernel.org/stable/c/f85cb059fad03a3b33a50023be91e944bb065ae8","https://git.kernel.org/stable/c/fadc626cae99aaa1325094edc6a9e2b883f3e562","https://git.kernel.org/stable/c/32e10aabc287f09a148ff759bb9ce70b01b0012c","https://git.kernel.org/stable/c/c51d00472fa54b9b05c17789ed665c17adf3a25d","https://git.kernel.org/stable/c/0f8bc147a963686b7351aa35d1701124ffacac08","https://git.kernel.org/stable/c/194d250cdc4a40ccbd179afd522a9e9846957402"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49532.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49532","state":"PUBLISHED","datePublished":"2025-02-26T02:13:52.013Z","dateUpdated":"2026-05-11T19:01:45.415Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:08:31.589Z"},"containers":{"cna":{"title":"drm/virtio: fix NULL pointer dereference in virtio_gpu_conn_get_modes","descriptions":[{"lang":"en","value":"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"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"e0828456578cc8ba0a69147f7ae3428392eec287","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"848dd072744ea662ab3097e3c8282bee552df218","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"edafcad84c4134ebec4bc24b29ca4497a1184eea","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"f85cb059fad03a3b33a50023be91e944bb065ae8","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"fadc626cae99aaa1325094edc6a9e2b883f3e562","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"32e10aabc287f09a148ff759bb9ce70b01b0012c","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"c51d00472fa54b9b05c17789ed665c17adf3a25d","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"0f8bc147a963686b7351aa35d1701124ffacac08","versionType":"git"},{"version":"dc5698e80cf724770283e10414054662bdf6ccfa","status":"affected","lessThan":"194d250cdc4a40ccbd179afd522a9e9846957402","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/virtio/virtgpu_display.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"4.9.318","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.283","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.247","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.198","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.121","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.46","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/virtio/virtgpu_display.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e0828456578cc8ba0a69147f7ae3428392eec287"},{"url":"https://git.kernel.org/stable/c/848dd072744ea662ab3097e3c8282bee552df218"},{"url":"https://git.kernel.org/stable/c/edafcad84c4134ebec4bc24b29ca4497a1184eea"},{"url":"https://git.kernel.org/stable/c/f85cb059fad03a3b33a50023be91e944bb065ae8"},{"url":"https://git.kernel.org/stable/c/fadc626cae99aaa1325094edc6a9e2b883f3e562"},{"url":"https://git.kernel.org/stable/c/32e10aabc287f09a148ff759bb9ce70b01b0012c"},{"url":"https://git.kernel.org/stable/c/c51d00472fa54b9b05c17789ed665c17adf3a25d"},{"url":"https://git.kernel.org/stable/c/0f8bc147a963686b7351aa35d1701124ffacac08"},{"url":"https://git.kernel.org/stable/c/194d250cdc4a40ccbd179afd522a9e9846957402"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:01:45.415Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.9.318"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.14.283"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"4.19.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.4.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.121"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.17.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49532","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:37:52.324584Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","type":"CWE","description":"CWE-476 NULL Pointer Dereference"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:46:41.000Z"}}]}}}