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CVE-2024-36479— fpga: bridge: add owner module and take its refcount

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 fpga:bridge 模块存在引用计数错误。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 21aeda950c5f84a8351b862816d832120b217a9b< 18dc8366abb6cadcb77668b1a16434654e355d49 affected
21aeda950c5f84a8351b862816d832120b217a9b< d7c4081c54a1d4068de9440957303a76f9e5c95b affected
21aeda950c5f84a8351b862816d832120b217a9b< 6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125 affected
21aeda950c5f84a8351b862816d832120b217a9b< 1da11f822042eb6ef4b6064dc048f157a7852529 affected
4.10 affected
< 4.10 unaffected
6.1.120≤ 6.1.* unaffected
6.6.33≤ 6.6.* unaffected
… +2 more rows
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I. Basic Information for CVE-2024-36479

Vulnerability Information
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Vulnerability Title
fpga: bridge: add owner module and take its refcount
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fpga: bridge: add owner module and take its refcount The current implementation of the fpga bridge assumes that the low-level module registers a driver for the parent device and uses its owner pointer to take the module's refcount. This approach is problematic since it can lead to a null pointer dereference while attempting to get the bridge if the parent device does not have a driver. To address this problem, add a module owner pointer to the fpga_bridge struct and use it to take the module's refcount. Modify the function for registering a bridge to take an additional owner module parameter and rename it to avoid conflicts. Use the old function name for a helper macro that automatically sets the module that registers the bridge as the owner. This ensures compatibility with existing low-level control modules and reduces the chances of registering a bridge without setting the owner. Also, update the documentation to keep it consistent with the new interface for registering an fpga bridge. Other changes: opportunistically move put_device() from __fpga_bridge_get() to fpga_bridge_get() and of_fpga_bridge_get() to improve code clarity since the bridge device is taken in these functions.
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 fpga:bridge 模块存在引用计数错误。
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 21aeda950c5f84a8351b862816d832120b217a9b ~ 18dc8366abb6cadcb77668b1a16434654e355d49 -
Linux Linux 4.10 -

II. Public POCs for CVE-2024-36479

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III. Intelligence Information for CVE-2024-36479

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Patches & Fixes for CVE-2024-36479 (1)

Other References for CVE-2024-36479 (3)

Same Patch Batch · Linux · 2024-06-24 · 14 CVEs total

CVE-2024-38384 7.8 HIGH blk-cgroup: fix list corruption from reorder of WRITE ->lqueued
CVE-2024-38663 7.8 HIGH blk-cgroup: fix list corruption from resetting io stat
CVE-2024-39292 7.8 HIGH um: Add winch to winch_handlers before registering winch IRQ
CVE-2024-32936 7.8 HIGH media: ti: j721e-csi2rx: Fix races while restarting DMA
CVE-2024-34027 7.8 HIGH f2fs: compress: fix to cover {reserve,release}_compress_blocks() w/ cp_rwsem lock
CVE-2024-33847 7.1 HIGH f2fs: compress: don't allow unaligned truncation on released compress inode
CVE-2024-38664 drm: zynqmp_dpsub: Always register bridge
CVE-2024-38667 riscv: prevent pt_regs corruption for secondary idle threads
CVE-2024-39291 drm/amdgpu: Fix buffer size in gfx_v9_4_3_init_ cp_compute_microcode() and rlc_microcode()
CVE-2024-34030 PCI: of_property: Return error for int_map allocation failure
CVE-2024-35247 fpga: region: add owner module and take its refcount
CVE-2024-37021 fpga: manager: add owner module and take its refcount
CVE-2024-37026 drm/xe: Only use reserved BCS instances for usm migrate exec queue

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-36479

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