CVE-2024-41085— cxl/mem: Fix no cxl_nvd during pmem region auto-assembling
Affected Version Matrix 6
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I. Basic Information for CVE-2024-41085
Vulnerability Information
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Vulnerability Title
cxl/mem: Fix no cxl_nvd during pmem region auto-assembling
Source: NVD (National Vulnerability Database)
Vulnerability Description
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: <TASK> ? __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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在CXL子系统在cxl端点端口探测期间自动组装pmem区域时，cxl_nvd的memdev需要在pmem区域探测期间可用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-41085
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Other References for CVE-2024-41085 (2)
Same Patch Batch · Linux · 2024-07-29 · 121 CVEs total
| CVE-2024-41089 | drm/nouveau/dispnv04: fix null pointer dereference in nv17_tv_get_hd_modes | |
| CVE-2024-42068 | bpf: Take return from set_memory_ro() into account with bpf_prog_lock_ro() | |
| CVE-2024-42067 | bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro() | |
| CVE-2024-42066 | drm/xe: Fix potential integer overflow in page size calculation | |
| CVE-2024-42065 | drm/xe: Add a NULL check in xe_ttm_stolen_mgr_init | |
| CVE-2024-42063 | bpf: Mark bpf prog stack with kmsan_unposion_memory in interpreter mode | |
| CVE-2024-42064 | drm/amd/display: Skip pipe if the pipe idx not set properly | |
| CVE-2023-52887 | net: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_s | |
| CVE-2024-41098 | ata: libata-core: Fix null pointer dereference on error | |
| CVE-2024-41097 | usb: atm: cxacru: fix endpoint checking in cxacru_bind() | |
| CVE-2024-41096 | PCI/MSI: Fix UAF in msi_capability_init | |
| CVE-2024-41095 | drm/nouveau/dispnv04: fix null pointer dereference in nv17_tv_get_ld_modes | |
| CVE-2024-41094 | drm/fbdev-dma: Only set smem_start is enable per module option | |
| CVE-2024-41093 | drm/amdgpu: avoid using null object of framebuffer | |
| CVE-2024-41092 | drm/i915/gt: Fix potential UAF by revoke of fence registers | |
| CVE-2024-41077 | null_blk: fix validation of block size | |
| CVE-2024-41080 | io_uring: fix possible deadlock in io_register_iowq_max_workers() | |
| CVE-2024-41079 | nvmet: always initialize cqe.result | |
| CVE-2024-41078 | btrfs: qgroup: fix quota root leak after quota disable failure | |
| CVE-2024-41075 | cachefiles: add consistency check for copen/cread |
Showing top 20 of 121 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-45836
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndti - CVE-2026-45835
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_conne - CVE-2026-45834
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_cha - CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans
Same vendor: Linux
- CVE-2026-45836
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndti - CVE-2026-45835
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_new_conne - CVE-2026-45834
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_cha - CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing - CVE-2026-43503
net: skbuff: propagate shared-frag marker through frag-trans
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