{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50628","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-08T01:14:55.191Z","datePublished":"2025-12-08T01:16:43.390Z","dateUpdated":"2026-05-11T19:22:31.598Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:22:31.598Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/gud/gud_pipe.c"],"versions":[{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","lessThan":"832f861a46039d50536dcfda0a9fb334b48d0f8b","status":"affected","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","lessThan":"e1078b270d218f8d58efb4d78ea25a4d16ba3490","status":"affected","versionType":"git"},{"version":"40e1a70b4aedf2859a1829991b48ef0ebe650bf2","lessThan":"951df98024f7272f85df5044eca7374f5b5b24ef","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/gud/gud_pipe.c"],"versions":[{"version":"5.13","status":"affected"},{"version":"0","lessThan":"5.13","status":"unaffected","versionType":"semver"},{"version":"6.1.16","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.3","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.3"}]}]}],"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"}}}}