Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2023-52492— dmaengine: fix NULL pointer in channel unregistration function

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__dma_async_device_channel_register（）函数存在安全漏洞。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.27% · P18

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux d2fb0a0438384fee08a418025f743913020033ce< 9de69732dde4e443c1c7f89acbbed2c45a6a8e17 affected
d2fb0a0438384fee08a418025f743913020033ce< 047fce470412ab64cb7345f9ff5d06919078ad79 affected
d2fb0a0438384fee08a418025f743913020033ce< 2ab32986a0b9e329eb7f8f04dd57cc127f797c08 affected
d2fb0a0438384fee08a418025f743913020033ce< 7f0ccfad2031eddcc510caf4e57f2d4aa2d8a50b affected
d2fb0a0438384fee08a418025f743913020033ce< 9263fd2a63487c6d04cbb7b74a48fb12e1e352d0 affected
d2fb0a0438384fee08a418025f743913020033ce< f5c24d94512f1b288262beda4d3dcb9629222fc7 affected
5.6 affected
< 5.6 unaffected
… +6 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2023-52492

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
dmaengine: fix NULL pointer in channel unregistration function
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: fix NULL pointer in channel unregistration function __dma_async_device_channel_register() can fail. In case of failure, chan->local is freed (with free_percpu()), and chan->local is nullified. When dma_async_device_unregister() is called (because of managed API or intentionally by DMA controller driver), channels are unconditionally unregistered, leading to this NULL pointer: [ 1.318693] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000d0 [...] [ 1.484499] Call trace: [ 1.486930] device_del+0x40/0x394 [ 1.490314] device_unregister+0x20/0x7c [ 1.494220] __dma_async_device_channel_unregister+0x68/0xc0 Look at dma_async_device_register() function error path, channel device unregistration is done only if chan->local is not NULL. Then add the same condition at the beginning of __dma_async_device_channel_unregister() function, to avoid NULL pointer issue whatever the API used to reach this function.
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__dma_async_device_channel_register（）函数存在安全漏洞。
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 d2fb0a0438384fee08a418025f743913020033ce ~ 9de69732dde4e443c1c7f89acbbed2c45a6a8e17 -
Linux Linux 5.6 -

II. Public POCs for CVE-2023-52492

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2023-52492

请登录查看更多情报信息。

Mailing List Discussions for CVE-2023-52492 (1)

Other References for CVE-2023-52492 (5)

Same Patch Batch · Linux · 2024-02-29 · 53 CVEs total

CVE-2023-52480 9.8 CRITICAL ksmbd: fix race condition between session lookup and expire
CVE-2023-52478 8.8 HIGH HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect
CVE-2023-52479 8.8 HIGH ksmbd: fix uaf in smb20_oplock_break_ack
CVE-2024-26620 8.2 HIGH s390/vfio-ap: always filter entire AP matrix
CVE-2021-47060 7.8 HIGH KVM: Stop looking for coalesced MMIO zones if the bus is destroyed
CVE-2023-52486 7.8 HIGH drm: Don't unref the same fb many times by mistake due to deadlock handling
CVE-2023-52483 7.8 HIGH mctp: perform route lookups under a RCU read-side lock
CVE-2021-47061 7.8 HIGH KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
CVE-2021-47068 7.8 HIGH net/nfc: fix use-after-free llcp_sock_bind/connect
CVE-2023-52491 7.8 HIGH media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_
CVE-2024-26608 7.8 HIGH ksmbd: fix global oob in ksmbd_nl_policy
CVE-2024-26610 7.8 HIGH wifi: iwlwifi: fix a memory corruption
CVE-2024-26614 7.8 HIGH tcp: make sure init the accept_queue's spinlocks once
CVE-2024-26617 7.8 HIGH fs/proc/task_mmu: move mmu notification mechanism inside mm lock
CVE-2024-26611 7.5 HIGH xsk: fix usage of multi-buffer BPF helpers for ZC XDP
CVE-2023-52497 7.1 HIGH erofs: fix lz4 inplace decompression
CVE-2021-47055 7.1 HIGH mtd: require write permissions for locking and badblock ioctls
CVE-2021-47066 7.1 HIGH async_xor: increase src_offs when dropping destination page
CVE-2021-47020 soundwire: stream: fix memory leak in stream config error path
CVE-2021-46959 spi: Fix use-after-free with devm_spi_alloc_*

Showing top 20 of 53 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52492

No comments yet

Leave a comment