{"api_version":"1","generated_at":"2026-11-12T05:22:01+00:00","cve":"CVE-2022-50628","urls":{"html":"https://cve.report/CVE-2022-50628","api":"https://cve.report/api/cve/CVE-2022-50628.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-50628","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-50628"},"summary":{"title":"drm/gud: Fix UBSAN warning","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gud: Fix UBSAN warning\n\nUBSAN complains about invalid value for bool:\n\n[  101.165172] [drm] Initialized gud 1.0.0 20200422 for 2-3.2:1.0 on minor 1\n[  101.213360] gud 2-3.2:1.0: [drm] fb1: guddrmfb frame buffer device\n[  101.213426] usbcore: registered new interface driver gud\n[  101.989431] ================================================================================\n[  101.989441] UBSAN: invalid-load in linux/include/linux/iosys-map.h:253:9\n[  101.989447] load of value 121 is not a valid value for type '_Bool'\n[  101.989451] CPU: 1 PID: 455 Comm: kworker/1:6 Not tainted 5.18.0-rc5-gud-5.18-rc5 #3\n[  101.989456] Hardware name: Hewlett-Packard HP EliteBook 820 G1/1991, BIOS L71 Ver. 01.44 04/12/2018\n[  101.989459] Workqueue: events_long gud_flush_work [gud]\n[  101.989471] Call Trace:\n[  101.989474]  <TASK>\n[  101.989479]  dump_stack_lvl+0x49/0x5f\n[  101.989488]  dump_stack+0x10/0x12\n[  101.989493]  ubsan_epilogue+0x9/0x3b\n[  101.989498]  __ubsan_handle_load_invalid_value.cold+0x44/0x49\n[  101.989504]  dma_buf_vmap.cold+0x38/0x3d\n[  101.989511]  ? find_busiest_group+0x48/0x300\n[  101.989520]  drm_gem_shmem_vmap+0x76/0x1b0 [drm_shmem_helper]\n[  101.989528]  drm_gem_shmem_object_vmap+0x9/0xb [drm_shmem_helper]\n[  101.989535]  drm_gem_vmap+0x26/0x60 [drm]\n[  101.989594]  drm_gem_fb_vmap+0x47/0x150 [drm_kms_helper]\n[  101.989630]  gud_prep_flush+0xc1/0x710 [gud]\n[  101.989639]  ? _raw_spin_lock+0x17/0x40\n[  101.989648]  gud_flush_work+0x1e0/0x430 [gud]\n[  101.989653]  ? __switch_to+0x11d/0x470\n[  101.989664]  process_one_work+0x21f/0x3f0\n[  101.989673]  worker_thread+0x200/0x3e0\n[  101.989679]  ? rescuer_thread+0x390/0x390\n[  101.989684]  kthread+0xfd/0x130\n[  101.989690]  ? kthread_complete_and_exit+0x20/0x20\n[  101.989696]  ret_from_fork+0x22/0x30\n[  101.989706]  </TASK>\n[  101.989708] ================================================================================\n\nThe source of this warning is in iosys_map_clear() called from\ndma_buf_vmap(). It conditionally sets values based on map->is_iomem. The\niosys_map variables are allocated uninitialized on the stack leading to\n->is_iomem having all kinds of values and not only 0/1.\n\nFix this by zeroing the iosys_map variables.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-12-08 02:15:48","updated_at":"2026-11-11 23:10:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e1078b270d218f8d58efb4d78ea25a4d16ba3490","name":"https://git.kernel.org/stable/c/e1078b270d218f8d58efb4d78ea25a4d16ba3490","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/951df98024f7272f85df5044eca7374f5b5b24ef","name":"https://git.kernel.org/stable/c/951df98024f7272f85df5044eca7374f5b5b24ef","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/832f861a46039d50536dcfda0a9fb334b48d0f8b","name":"https://git.kernel.org/stable/c/832f861a46039d50536dcfda0a9fb334b48d0f8b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-50628","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50628","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 832f861a46039d50536dcfda0a9fb334b48d0f8b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 e1078b270d218f8d58efb4d78ea25a4d16ba3490 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 951df98024f7272f85df5044eca7374f5b5b24ef git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.16 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.2.3 6.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2022","cve_id":"50628","cve":"CVE-2022-50628","epss":"0.002110000","percentile":"0.114780000","score_date":"2026-11-10","updated_at":"2026-11-12 00:09:30"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/gud/gud_pipe.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"832f861a46039d50536dcfda0a9fb334b48d0f8b","status":"affected","version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","versionType":"git"},{"lessThan":"e1078b270d218f8d58efb4d78ea25a4d16ba3490","status":"affected","version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","versionType":"git"},{"lessThan":"951df98024f7272f85df5044eca7374f5b5b24ef","status":"affected","version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/gud/gud_pipe.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.16","versionType":"semver"},{"lessThanOrEqual":"6.2.*","status":"unaffected","version":"6.2.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.16","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.2.3","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.3","versionStartIncluding":"5.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gud: Fix UBSAN warning\n\nUBSAN complains about invalid value for bool:\n\n[  101.165172] [drm] Initialized gud 1.0.0 20200422 for 2-3.2:1.0 on minor 1\n[  101.213360] gud 2-3.2:1.0: [drm] fb1: guddrmfb frame buffer device\n[  101.213426] usbcore: registered new interface driver gud\n[  101.989431] ================================================================================\n[  101.989441] UBSAN: invalid-load in linux/include/linux/iosys-map.h:253:9\n[  101.989447] load of value 121 is not a valid value for type '_Bool'\n[  101.989451] CPU: 1 PID: 455 Comm: kworker/1:6 Not tainted 5.18.0-rc5-gud-5.18-rc5 #3\n[  101.989456] Hardware name: Hewlett-Packard HP EliteBook 820 G1/1991, BIOS L71 Ver. 01.44 04/12/2018\n[  101.989459] Workqueue: events_long gud_flush_work [gud]\n[  101.989471] Call Trace:\n[  101.989474]  <TASK>\n[  101.989479]  dump_stack_lvl+0x49/0x5f\n[  101.989488]  dump_stack+0x10/0x12\n[  101.989493]  ubsan_epilogue+0x9/0x3b\n[  101.989498]  __ubsan_handle_load_invalid_value.cold+0x44/0x49\n[  101.989504]  dma_buf_vmap.cold+0x38/0x3d\n[  101.989511]  ? find_busiest_group+0x48/0x300\n[  101.989520]  drm_gem_shmem_vmap+0x76/0x1b0 [drm_shmem_helper]\n[  101.989528]  drm_gem_shmem_object_vmap+0x9/0xb [drm_shmem_helper]\n[  101.989535]  drm_gem_vmap+0x26/0x60 [drm]\n[  101.989594]  drm_gem_fb_vmap+0x47/0x150 [drm_kms_helper]\n[  101.989630]  gud_prep_flush+0xc1/0x710 [gud]\n[  101.989639]  ? _raw_spin_lock+0x17/0x40\n[  101.989648]  gud_flush_work+0x1e0/0x430 [gud]\n[  101.989653]  ? __switch_to+0x11d/0x470\n[  101.989664]  process_one_work+0x21f/0x3f0\n[  101.989673]  worker_thread+0x200/0x3e0\n[  101.989679]  ? rescuer_thread+0x390/0x390\n[  101.989684]  kthread+0xfd/0x130\n[  101.989690]  ? kthread_complete_and_exit+0x20/0x20\n[  101.989696]  ret_from_fork+0x22/0x30\n[  101.989706]  </TASK>\n[  101.989708] ================================================================================\n\nThe source of this warning is in iosys_map_clear() called from\ndma_buf_vmap(). It conditionally sets values based on map->is_iomem. The\niosys_map variables are allocated uninitialized on the stack leading to\n->is_iomem having all kinds of values and not only 0/1.\n\nFix this by zeroing the iosys_map variables."}],"providerMetadata":{"dateUpdated":"2026-05-11T19:22:31.598Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/832f861a46039d50536dcfda0a9fb334b48d0f8b"},{"url":"https://git.kernel.org/stable/c/e1078b270d218f8d58efb4d78ea25a4d16ba3490"},{"url":"https://git.kernel.org/stable/c/951df98024f7272f85df5044eca7374f5b5b24ef"}],"title":"drm/gud: Fix UBSAN warning","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2022-50628","datePublished":"2025-12-08T01:16:43.390Z","dateReserved":"2025-12-08T01:14:55.191Z","dateUpdated":"2026-05-11T19:22:31.598Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-12-08 02:15:48","lastModifiedDate":"2026-11-11 23:10:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2022","CveId":"50628","Ordinal":"1","Title":"drm/gud: Fix UBSAN warning","CVE":"CVE-2022-50628","Year":"2022"},"notes":[{"CveYear":"2022","CveId":"50628","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gud: Fix UBSAN warning\n\nUBSAN complains about invalid value for bool:\n\n[  101.165172] [drm] Initialized gud 1.0.0 20200422 for 2-3.2:1.0 on minor 1\n[  101.213360] gud 2-3.2:1.0: [drm] fb1: guddrmfb frame buffer device\n[  101.213426] usbcore: registered new interface driver gud\n[  101.989431] ================================================================================\n[  101.989441] UBSAN: invalid-load in linux/include/linux/iosys-map.h:253:9\n[  101.989447] load of value 121 is not a valid value for type '_Bool'\n[  101.989451] CPU: 1 PID: 455 Comm: kworker/1:6 Not tainted 5.18.0-rc5-gud-5.18-rc5 #3\n[  101.989456] Hardware name: Hewlett-Packard HP EliteBook 820 G1/1991, BIOS L71 Ver. 01.44 04/12/2018\n[  101.989459] Workqueue: events_long gud_flush_work [gud]\n[  101.989471] Call Trace:\n[  101.989474]  <TASK>\n[  101.989479]  dump_stack_lvl+0x49/0x5f\n[  101.989488]  dump_stack+0x10/0x12\n[  101.989493]  ubsan_epilogue+0x9/0x3b\n[  101.989498]  __ubsan_handle_load_invalid_value.cold+0x44/0x49\n[  101.989504]  dma_buf_vmap.cold+0x38/0x3d\n[  101.989511]  ? find_busiest_group+0x48/0x300\n[  101.989520]  drm_gem_shmem_vmap+0x76/0x1b0 [drm_shmem_helper]\n[  101.989528]  drm_gem_shmem_object_vmap+0x9/0xb [drm_shmem_helper]\n[  101.989535]  drm_gem_vmap+0x26/0x60 [drm]\n[  101.989594]  drm_gem_fb_vmap+0x47/0x150 [drm_kms_helper]\n[  101.989630]  gud_prep_flush+0xc1/0x710 [gud]\n[  101.989639]  ? _raw_spin_lock+0x17/0x40\n[  101.989648]  gud_flush_work+0x1e0/0x430 [gud]\n[  101.989653]  ? __switch_to+0x11d/0x470\n[  101.989664]  process_one_work+0x21f/0x3f0\n[  101.989673]  worker_thread+0x200/0x3e0\n[  101.989679]  ? rescuer_thread+0x390/0x390\n[  101.989684]  kthread+0xfd/0x130\n[  101.989690]  ? kthread_complete_and_exit+0x20/0x20\n[  101.989696]  ret_from_fork+0x22/0x30\n[  101.989706]  </TASK>\n[  101.989708] ================================================================================\n\nThe source of this warning is in iosys_map_clear() called from\ndma_buf_vmap(). It conditionally sets values based on map->is_iomem. The\niosys_map variables are allocated uninitialized on the stack leading to\n->is_iomem having all kinds of values and not only 0/1.\n\nFix this by zeroing the iosys_map variables.","Type":"Description","Title":"drm/gud: Fix UBSAN warning"}]}}}