{
  "threat_severity" : "Low",
  "public_date" : "2024-07-29T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: cxl/mem: Fix no cxl_nvd during pmem region auto-assembling",
    "id" : "2300481",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2300481"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-476",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ncxl/mem: Fix no cxl_nvd during pmem region auto-assembling\nWhen CXL subsystem is auto-assembling a pmem region during cxl\nendpoint port probing, always hit below calltrace.\nBUG: kernel NULL pointer dereference, address: 0000000000000078\n#PF: supervisor read access in kernel mode\n#PF: error_code(0x0000) - not-present page\nRIP: 0010:cxl_pmem_region_probe+0x22e/0x360 [cxl_pmem]\nCall Trace:\n<TASK>\n? __die+0x24/0x70\n? page_fault_oops+0x82/0x160\n? do_user_addr_fault+0x65/0x6b0\n? exc_page_fault+0x7d/0x170\n? asm_exc_page_fault+0x26/0x30\n? cxl_pmem_region_probe+0x22e/0x360 [cxl_pmem]\n? cxl_pmem_region_probe+0x1ac/0x360 [cxl_pmem]\ncxl_bus_probe+0x1b/0x60 [cxl_core]\nreally_probe+0x173/0x410\n? __pfx___device_attach_driver+0x10/0x10\n__driver_probe_device+0x80/0x170\ndriver_probe_device+0x1e/0x90\n__device_attach_driver+0x90/0x120\nbus_for_each_drv+0x84/0xe0\n__device_attach+0xbc/0x1f0\nbus_probe_device+0x90/0xa0\ndevice_add+0x51c/0x710\ndevm_cxl_add_pmem_region+0x1b5/0x380 [cxl_core]\ncxl_bus_probe+0x1b/0x60 [cxl_core]\nThe cxl_nvd of the memdev needs to be available during the pmem region\nprobe. Currently the cxl_nvd is registered after the endpoint port probe.\nThe endpoint probe, in the case of autoassembly of regions, can cause a\npmem region probe requiring the not yet available cxl_nvd. Adjust the\nsequence so this dependency is met.\nThis requires adding a port parameter to cxl_find_nvdimm_bridge() that\ncan be used to query the ancestor root port. The endpoint port is not\nyet available, but will share a common ancestor with its parent, so\nstart the query from there instead." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-12T00:00:00Z",
    "advisory" : "RHSA-2024:9315",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.11.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-12T00:00:00Z",
    "advisory" : "RHSA-2024:9315",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.11.1.el9_5"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2024-41085\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-41085\nhttps://lore.kernel.org/linux-cve-announce/2024072951-CVE-2024-41085-9bbd@gregkh/T" ],
  "name" : "CVE-2024-41085",
  "csaw" : false
}