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CVE-2024-43863— drm/vmwgfx: Fix a deadlock in dma buf fence polling

EPSS 0.02% · P4

Affected Version Matrix 14

VendorProductVersion RangeStatus
LinuxLinux2298e804e96eb3635c39519c8287befd92460303< 9908dc0d2ef0e4aec8a242c098455729c0e2f017affected
2298e804e96eb3635c39519c8287befd92460303< 9e20d028d8d1deb1e7fed18f22ffc01669cf3237affected
2298e804e96eb3635c39519c8287befd92460303< 3b933b16c996af8adb6bc1b5748a63dfb41a82bcaffected
2298e804e96eb3635c39519c8287befd92460303< a8943969f9ead2fd3044fc826140a21622ef830eaffected
2298e804e96eb3635c39519c8287befd92460303< c98ab18b9f315ff977c2c65d7c71298ef98be8e3affected
2298e804e96eb3635c39519c8287befd92460303< e58337100721f3cc0c7424a18730e4f39844934faffected
3.18affected
< 3.18unaffected
… +6 more rows
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I. Basic Information for CVE-2024-43863

Vulnerability Information
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Vulnerability Title
drm/vmwgfx: Fix a deadlock in dma buf fence polling
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Fix a deadlock in dma buf fence polling Introduce a version of the fence ops that on release doesn't remove the fence from the pending list, and thus doesn't require a lock to fix poll->fence wait->fence unref deadlocks. vmwgfx overwrites the wait callback to iterate over the list of all fences and update their status, to do that it holds a lock to prevent the list modifcations from other threads. The fence destroy callback both deletes the fence and removes it from the list of pending fences, for which it holds a lock. dma buf polling cb unrefs a fence after it's been signaled: so the poll calls the wait, which signals the fences, which are being destroyed. The destruction tries to acquire the lock on the pending fences list which it can never get because it's held by the wait from which it was called. Old bug, but not a lot of userspace apps were using dma-buf polling interfaces. Fix those, in particular this fixes KDE stalls/deadlock.
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。攻击者利用该漏洞会导致死锁问题。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 2298e804e96eb3635c39519c8287befd92460303 ~ 9908dc0d2ef0e4aec8a242c098455729c0e2f017 -
LinuxLinux 3.18 -

II. Public POCs for CVE-2024-43863

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III. Intelligence Information for CVE-2024-43863

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Same Patch Batch · Linux · 2024-08-20 · 8 CVEs total

CVE-2024-43861net: usb: qmi_wwan: fix memory leak for not ip packets
CVE-2024-43862net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex
CVE-2024-43864net/mlx5e: Fix CT entry update leaks of modify header context
CVE-2024-43865s390/fpu: Re-add exception handling in load_fpu_state()
CVE-2024-43866net/mlx5: Always drain health in shutdown callback
CVE-2024-43867drm/nouveau: prime: fix refcount underflow
CVE-2024-43868riscv/purgatory: align riscv_kernel_entry

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-43863

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