{"id":"CVE-2022-50080","state":"PUBLISHED","title":"tee: add overflow check in register_shm_helper()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: add overflow check in register_shm_helper()\n\nWith special lengths supplied by user space, register_shm_helper() has\nan integer overflow when calculating the number of pages covered by a\nsupplied user space memory region.\n\nThis causes internal_get_user_pages_fast() a helper function of\npin_user_pages_fast() to do a NULL pointer dereference:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n  Modules linked in:\n  CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11\n  Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015\n  pc : internal_get_user_pages_fast+0x474/0xa80\n  Call trace:\n   internal_get_user_pages_fast+0x474/0xa80\n   pin_user_pages_fast+0x24/0x4c\n   register_shm_helper+0x194/0x330\n   tee_shm_register_user_buf+0x78/0x120\n   tee_ioctl+0xd0/0x11a0\n   __arm64_sys_ioctl+0xa8/0xec\n   invoke_syscall+0x48/0x114\n\nFix this by adding an an explicit call to access_ok() in\ntee_shm_register_user_buf() to catch an invalid user space address\nearly.","publishedAt":"2025-06-18T11:02:23.003Z","updatedAt":"2026-05-11T19:12:28.920Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"b37e0f17653c00b586cdbcdf0dbca475358ecffd","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"965333345fe952cc7eebc8e3a565ffc709441af2","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"578c349570d2a912401963783b36e0ec7a25c053","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"c12f0e6126ad223806a365084e86370511654bf1","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"2f8e79a1a6128214cb9b205a9869341af5dfb16b","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"58c008d4d398f792ca67f35650610864725518fd","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"573ae4f13f630d6660008f1974c0a8a29c30e18a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tee/tee_shm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.16","versionType":"semver"},{"version":"4.19.256","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.211","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.137","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.62","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.18.19","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19.3","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tee/tee_shm.c"]}],"references":["https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd","https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2","https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053","https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1","https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b","https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd","https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50080.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50080","state":"PUBLISHED","datePublished":"2025-06-18T11:02:23.003Z","dateUpdated":"2026-05-11T19:12:28.920Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-06-18T10:57:27.409Z"},"containers":{"cna":{"title":"tee: add overflow check in register_shm_helper()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: add overflow check in register_shm_helper()\n\nWith special lengths supplied by user space, register_shm_helper() has\nan integer overflow when calculating the number of pages covered by a\nsupplied user space memory region.\n\nThis causes internal_get_user_pages_fast() a helper function of\npin_user_pages_fast() to do a NULL pointer dereference:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n  Modules linked in:\n  CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11\n  Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015\n  pc : internal_get_user_pages_fast+0x474/0xa80\n  Call trace:\n   internal_get_user_pages_fast+0x474/0xa80\n   pin_user_pages_fast+0x24/0x4c\n   register_shm_helper+0x194/0x330\n   tee_shm_register_user_buf+0x78/0x120\n   tee_ioctl+0xd0/0x11a0\n   __arm64_sys_ioctl+0xa8/0xec\n   invoke_syscall+0x48/0x114\n\nFix this by adding an an explicit call to access_ok() in\ntee_shm_register_user_buf() to catch an invalid user space address\nearly."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"b37e0f17653c00b586cdbcdf0dbca475358ecffd","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"965333345fe952cc7eebc8e3a565ffc709441af2","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"578c349570d2a912401963783b36e0ec7a25c053","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"c12f0e6126ad223806a365084e86370511654bf1","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"2f8e79a1a6128214cb9b205a9869341af5dfb16b","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"58c008d4d398f792ca67f35650610864725518fd","versionType":"git"},{"version":"033ddf12bcf5326b93bd604f50a7474a434a35f9","status":"affected","lessThan":"573ae4f13f630d6660008f1974c0a8a29c30e18a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tee/tee_shm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.16","versionType":"semver"},{"version":"4.19.256","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.211","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.137","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.62","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.18.19","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19.3","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tee/tee_shm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd"},{"url":"https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2"},{"url":"https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053"},{"url":"https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1"},{"url":"https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b"},{"url":"https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd"},{"url":"https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:12:28.920Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"4.19.256"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.4.211"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.10.137"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.15.62"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.18.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"5.19.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.16","versionEndExcluding":"6.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}