{"id":"DEBIAN-CVE-2022-50080","details":"In the Linux kernel, the following vulnerability has been resolved:  tee: add overflow check in register_shm_helper()  With special lengths supplied by user space, register_shm_helper() has an integer overflow when calculating the number of pages covered by a supplied user space memory region.  This causes internal_get_user_pages_fast() a helper function of pin_user_pages_fast() to do a NULL pointer dereference:    Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010   Modules linked in:   CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11   Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015   pc : internal_get_user_pages_fast+0x474/0xa80   Call trace:    internal_get_user_pages_fast+0x474/0xa80    pin_user_pages_fast+0x24/0x4c    register_shm_helper+0x194/0x330    tee_shm_register_user_buf+0x78/0x120    tee_ioctl+0xd0/0x11a0    __arm64_sys_ioctl+0xa8/0xec    invoke_syscall+0x48/0x114  Fix this by adding an an explicit call to access_ok() in tee_shm_register_user_buf() to catch an invalid user space address early.","modified":"2026-09-01T16:05:34.226981920Z","published":"2025-06-18T11:15:36.980Z","upstream":["CVE-2022-50080"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50080"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50080.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50080.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50080.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}