{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47497","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-22T06:20:56.203Z","datePublished":"2024-05-22T08:19:44.144Z","dateUpdated":"2025-05-04T07:12:19.190Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:12:19.190Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvmem: Fix shift-out-of-bound (UBSAN) with byte size cells\n\nIf a cell has 'nbits' equal to a multiple of BITS_PER_BYTE the logic\n\n *p &= GENMASK((cell->nbits%BITS_PER_BYTE) - 1, 0);\n\nwill become undefined behavior because nbits modulo BITS_PER_BYTE is 0, and we\nsubtract one from that making a large number that is then shifted more than the\nnumber of bits that fit into an unsigned long.\n\nUBSAN reports this problem:\n\n UBSAN: shift-out-of-bounds in drivers/nvmem/core.c:1386:8\n shift exponent 64 is too large for 64-bit type 'unsigned long'\n CPU: 6 PID: 7 Comm: kworker/u16:0 Not tainted 5.15.0-rc3+ #9\n Hardware name: Google Lazor (rev3+) with KB Backlight (DT)\n Workqueue: events_unbound deferred_probe_work_func\n Call trace:\n  dump_backtrace+0x0/0x170\n  show_stack+0x24/0x30\n  dump_stack_lvl+0x64/0x7c\n  dump_stack+0x18/0x38\n  ubsan_epilogue+0x10/0x54\n  __ubsan_handle_shift_out_of_bounds+0x180/0x194\n  __nvmem_cell_read+0x1ec/0x21c\n  nvmem_cell_read+0x58/0x94\n  nvmem_cell_read_variable_common+0x4c/0xb0\n  nvmem_cell_read_variable_le_u32+0x40/0x100\n  a6xx_gpu_init+0x170/0x2f4\n  adreno_bind+0x174/0x284\n  component_bind_all+0xf0/0x264\n  msm_drm_bind+0x1d8/0x7a0\n  try_to_bring_up_master+0x164/0x1ac\n  __component_add+0xbc/0x13c\n  component_add+0x20/0x2c\n  dp_display_probe+0x340/0x384\n  platform_probe+0xc0/0x100\n  really_probe+0x110/0x304\n  __driver_probe_device+0xb8/0x120\n  driver_probe_device+0x4c/0xfc\n  __device_attach_driver+0xb0/0x128\n  bus_for_each_drv+0x90/0xdc\n  __device_attach+0xc8/0x174\n  device_initial_probe+0x20/0x2c\n  bus_probe_device+0x40/0xa4\n  deferred_probe_work_func+0x7c/0xb8\n  process_one_work+0x128/0x21c\n  process_scheduled_works+0x40/0x54\n  worker_thread+0x1ec/0x2a8\n  kthread+0x138/0x158\n  ret_from_fork+0x10/0x20\n\nFix it by making sure there are any bits to mask out."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvmem/core.c"],"versions":[{"version":"69aba7948cbe53f2f1827e84e9dd0ae470a5072e","lessThan":"abcb8d33e4d2215ccde5ab5ccf9f730a59d79d97","status":"affected","versionType":"git"},{"version":"69aba7948cbe53f2f1827e84e9dd0ae470a5072e","lessThan":"60df06bbdf497e37ed25ad40572c362e5b0998df","status":"affected","versionType":"git"},{"version":"69aba7948cbe53f2f1827e84e9dd0ae470a5072e","lessThan":"2df6c023050205c4d04ffc121bc549f65cb8d1df","status":"affected","versionType":"git"},{"version":"69aba7948cbe53f2f1827e84e9dd0ae470a5072e","lessThan":"eb0fc8e7170e61eaf65d28dee4a8baf4e86b19ca","status":"affected","versionType":"git"},{"version":"69aba7948cbe53f2f1827e84e9dd0ae470a5072e","lessThan":"0594f1d048d8dc338eb9a240021b1d00ae1eb082","status":"affected","versionType":"git"},{"version":"69aba7948cbe53f2f1827e84e9dd0ae470a5072e","lessThan":"57e48886401b14cd351423fabfec2cfd18df4f66","status":"affected","versionType":"git"},{"version":"69aba7948cbe53f2f1827e84e9dd0ae470a5072e","lessThan":"0e822e5413da1af28cca350cb1cb42b6133bdcae","status":"affected","versionType":"git"},{"version":"69aba7948cbe53f2f1827e84e9dd0ae470a5072e","lessThan":"5d388fa01fa6eb310ac023a363a6cb216d9d8fe9","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/nvmem/core.c"],"versions":[{"version":"4.3","status":"affected"},{"version":"0","lessThan":"4.3","status":"unaffected","versionType":"semver"},{"version":"4.4.290","lessThanOrEqual":"4.4.*","status":"unaffected","versionType":"semver"},{"version":"4.9.288","lessThanOrEqual":"4.9.*","status":"unaffected","versionType":"semver"},{"version":"4.14.252","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.213","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.155","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.75","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.14.14","lessThanOrEqual":"5.14.*","status":"unaffected","versionType":"semver"},{"version":"5.15","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":"4.3","versionEndExcluding":"4.4.290"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"4.9.288"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"4.14.252"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"4.19.213"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.4.155"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.10.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.14.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.15"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/abcb8d33e4d2215ccde5ab5ccf9f730a59d79d97"},{"url":"https://git.kernel.org/stable/c/60df06bbdf497e37ed25ad40572c362e5b0998df"},{"url":"https://git.kernel.org/stable/c/2df6c023050205c4d04ffc121bc549f65cb8d1df"},{"url":"https://git.kernel.org/stable/c/eb0fc8e7170e61eaf65d28dee4a8baf4e86b19ca"},{"url":"https://git.kernel.org/stable/c/0594f1d048d8dc338eb9a240021b1d00ae1eb082"},{"url":"https://git.kernel.org/stable/c/57e48886401b14cd351423fabfec2cfd18df4f66"},{"url":"https://git.kernel.org/stable/c/0e822e5413da1af28cca350cb1cb42b6133bdcae"},{"url":"https://git.kernel.org/stable/c/5d388fa01fa6eb310ac023a363a6cb216d9d8fe9"}],"title":"nvmem: Fix shift-out-of-bound (UBSAN) with byte size cells","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47497","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-05-22T17:50:37.993929Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:13:32.686Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.611Z"},"title":"CVE Program 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