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CVE-2024-41085— cxl/mem: Fix no cxl_nvd during pmem region auto-assembling

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 4.7 Difficulty: Moderate EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1562.001

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux f17b558d6663101f876a1d9cbbad3de0c8f4ce4d< bc262c6d32b6c1715e64220e2cbfa64a225cd266 affected
f17b558d6663101f876a1d9cbbad3de0c8f4ce4d< 1d064e4fbebcf5b18dc10c1f3973487eb163b600 affected
f17b558d6663101f876a1d9cbbad3de0c8f4ce4d< 84ec985944ef34a34a1605b93ce401aa8737af96 affected
6.2 affected
< 6.2 unaffected
6.6.158≤ 6.6.* unaffected
6.9.8≤ 6.9.* unaffected
6.10≤ * unaffected
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux f17b558d6663101f876a1d9cbbad3de0c8f4ce4d ~ bc262c6d32b6c1715e64220e2cbfa64a225cd266 -
Linux Linux 6.2 -

II. Public POCs for CVE-2024-41085

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III. Intelligence Information for CVE-2024-41085

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Patches & Fixes for CVE-2024-41085 (1)

Other References for CVE-2024-41085 (2)

Same Patch Batch · Linux · 2024-07-29 · 121 CVEs total

CVE-2024-41081 9.8 CRITICAL ila: block BH in ila_output()
CVE-2024-41073 9.8 CRITICAL nvme: avoid double free special payload
CVE-2024-41040 9.8 CRITICAL net/sched: Fix UAF when resolving a clash
CVE-2024-41091 8.8 HIGH tun: add missing verification for short frame
CVE-2024-42083 8.8 HIGH ionic: fix kernel panic due to multi-buffer handling
CVE-2024-41062 8.8 HIGH bluetooth/l2cap: sync sock recv cb and release
CVE-2024-41046 8.8 HIGH net: ethernet: lantiq_etop: fix double free in detach
CVE-2024-41090 8.8 HIGH tap: add missing verification for short frame
CVE-2024-41057 7.8 HIGH cachefiles: fix slab-use-after-free in cachefiles_withdraw_cookie()
CVE-2024-42072 7.8 HIGH bpf: Fix may_goto with negative offset.
CVE-2024-42075 7.8 HIGH bpf: Fix remap of arena.
CVE-2024-41064 7.8 HIGH powerpc/eeh: avoid possible crash when edev->pdev changes
CVE-2024-41015 7.8 HIGH ocfs2: add bounds checking to ocfs2_check_dir_entry()
CVE-2024-41059 7.8 HIGH hfsplus: fix uninit-value in copy_name
CVE-2024-41049 7.8 HIGH filelock: fix potential use-after-free in posix_lock_inode
CVE-2024-41045 7.8 HIGH bpf: Defer work in bpf_timer_cancel_and_free
CVE-2024-41017 7.8 HIGH jfs: don't walk off the end of ealist
CVE-2024-41060 7.8 HIGH drm/radeon: check bo_va->bo is non-NULL before using it
CVE-2024-41051 7.8 HIGH cachefiles: wait for ondemand_object_worker to finish when dropping object
CVE-2024-41069 7.8 HIGH ASoC: topology: Fix references to freed memory

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-41085

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