{"id":"DEBIAN-CVE-2021-47202","details":"In the Linux kernel, the following vulnerability has been resolved:  thermal: Fix NULL pointer dereferences in of_thermal_ functions  of_parse_thermal_zones() parses the thermal-zones node and registers a thermal_zone device for each subnode. However, if a thermal zone is consuming a thermal sensor and that thermal sensor device hasn't probed yet, an attempt to set trip_point_*_temp for that thermal zone device can cause a NULL pointer dereference. Fix it.   console:/sys/class/thermal/thermal_zone87 # echo 120000 \u003e trip_point_0_temp  ...  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020  ...  Call trace:   of_thermal_set_trip_temp+0x40/0xc4   trip_point_temp_store+0xc0/0x1dc   dev_attr_store+0x38/0x88   sysfs_kf_write+0x64/0xc0   kernfs_fop_write_iter+0x108/0x1d0   vfs_write+0x2f4/0x368   ksys_write+0x7c/0xec   __arm64_sys_write+0x20/0x30   el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc   do_el0_svc+0x28/0xa0   el0_svc+0x14/0x24   el0_sync_handler+0x88/0xec   el0_sync+0x1c0/0x200  While at it, fix the possible NULL pointer dereference in other functions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend().","modified":"2026-09-15T09:02:39.784046254Z","published":"2024-04-10T19:15:48.167Z","upstream":["CVE-2021-47202"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-47202"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47202.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47202.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47202.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"}]}