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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2021-47016— m68k: mvme147,mvme16x: Don't wipe PCC timer config bits

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jiffies计数器没有更新。

AI Predicted 4.4 Difficulty: Theoretical EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 7529b90d051e4629884771ba2b1d3a87d2c6a9d7< f6a90818a32058fca62cda3a2027a6a2364e1878 affected
7529b90d051e4629884771ba2b1d3a87d2c6a9d7< 1dfb26df15fc7036a74221d43de7427f74293dae affected
7529b90d051e4629884771ba2b1d3a87d2c6a9d7< 73fdeb612d25b5e105c219e05434285a45d23576 affected
7529b90d051e4629884771ba2b1d3a87d2c6a9d7< 5d34225169346cab5145978d153b9ce90e9ace21 affected
7529b90d051e4629884771ba2b1d3a87d2c6a9d7< 43262178c043032e7c42d00de44c818ba05f9967 affected
5.2 affected
< 5.2 unaffected
5.4.119≤ 5.4.* unaffected
… +4 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2021-47016

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
m68k: mvme147,mvme16x: Don't wipe PCC timer config bits
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: m68k: mvme147,mvme16x: Don't wipe PCC timer config bits Don't clear the timer 1 configuration bits when clearing the interrupt flag and counter overflow. As Michael reported, "This results in no timer interrupts being delivered after the first. Initialization then hangs in calibrate_delay as the jiffies counter is not updated." On mvme16x, enable the timer after requesting the irq, consistent with mvme147.
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jiffies计数器没有更新。
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 7529b90d051e4629884771ba2b1d3a87d2c6a9d7 ~ f6a90818a32058fca62cda3a2027a6a2364e1878 -
Linux Linux 5.2 -

II. Public POCs for CVE-2021-47016

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2021-47016

请登录查看更多情报信息。

Other References for CVE-2021-47016 (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-2021-47068 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-2023-52486 7.8 HIGH drm: Don't unref the same fb many times by mistake due to deadlock handling
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-2023-52483 7.8 HIGH mctp: perform route lookups under a RCU read-side lock
CVE-2021-47060 7.8 HIGH KVM: Stop looking for coalesced MMIO zones if the bus is destroyed
CVE-2021-47061 7.8 HIGH KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU
CVE-2024-26611 7.5 HIGH xsk: fix usage of multi-buffer BPF helpers for ZC XDP
CVE-2021-47066 7.1 HIGH async_xor: increase src_offs when dropping destination page
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-2021-47058 regmap: set debugfs_name to NULL after it is freed
CVE-2023-52477 usb: hub: Guard against accesses to uninitialized BOS descriptors

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-2021-47016

No comments yet

Leave a comment