{"id":"DEBIAN-CVE-2024-41085","details":"In the Linux kernel, the following vulnerability has been resolved:  cxl/mem: Fix no cxl_nvd during pmem region auto-assembling  When CXL subsystem is auto-assembling a pmem region during cxl endpoint port probing, always hit below calltrace.   BUG: kernel NULL pointer dereference, address: 0000000000000078  #PF: supervisor read access in kernel mode  #PF: error_code(0x0000) - not-present page  RIP: 0010:cxl_pmem_region_probe+0x22e/0x360 [cxl_pmem]  Call Trace:   \u003cTASK\u003e   ? __die+0x24/0x70   ? page_fault_oops+0x82/0x160   ? do_user_addr_fault+0x65/0x6b0   ? exc_page_fault+0x7d/0x170   ? asm_exc_page_fault+0x26/0x30   ? cxl_pmem_region_probe+0x22e/0x360 [cxl_pmem]   ? cxl_pmem_region_probe+0x1ac/0x360 [cxl_pmem]   cxl_bus_probe+0x1b/0x60 [cxl_core]   really_probe+0x173/0x410   ? __pfx___device_attach_driver+0x10/0x10   __driver_probe_device+0x80/0x170   driver_probe_device+0x1e/0x90   __device_attach_driver+0x90/0x120   bus_for_each_drv+0x84/0xe0   __device_attach+0xbc/0x1f0   bus_probe_device+0x90/0xa0   device_add+0x51c/0x710   devm_cxl_add_pmem_region+0x1b5/0x380 [cxl_core]   cxl_bus_probe+0x1b/0x60 [cxl_core]  The cxl_nvd of the memdev needs to be available during the pmem region probe. Currently the cxl_nvd is registered after the endpoint port probe. The endpoint probe, in the case of autoassembly of regions, can cause a pmem region probe requiring the not yet available cxl_nvd. Adjust the sequence so this dependency is met.  This requires adding a port parameter to cxl_find_nvdimm_bridge() that can be used to query the ancestor root port. The endpoint port is not yet available, but will share a common ancestor with its parent, so start the query from there instead.","modified":"2026-09-15T09:02:57.561979002Z","published":"2024-07-29T16:15:03.960Z","upstream":["CVE-2024-41085"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-41085"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-41085.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.8-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-41085.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"}]}