CVE-2021-47372
What it is
In the Linux kernel, the following vulnerability has been resolved: net: macb: fix use after free on rmmod plat_dev->dev->platform_data is released by platform_device_unregister(), use of pclk and hclk is a use-after-free. Since device unregister won't need a clk device we adjust the function call sequence to fix this issue. [ 31.261225] BUG: KASAN: use-after-free in macb_remove+0x77/0xc6 [macb_pci] [ 31.275563] Freed by task 306: [ 30.276782] platform_device_release+0x25/0x80
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-416 · Use after free
- Record status
- Analyzed
Affected
- Linux Kernel < 4.14.249
- Linux Kernel < 4.19.209
- Linux Kernel < 5.4.150
- Linux Kernel < 5.10.70
- Linux Kernel < 5.14.9
- Linux Kernel 5.15
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-47372.md and follow it. Check whether this project is affected by CVE-2021-47372. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/1da750d1e2140ef43d64d17f301ff6f41b45541e
- https://git.kernel.org/stable/c/46670fb832ee80943715df618632ca13c2e96f2b
- https://git.kernel.org/stable/c/4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5
- https://git.kernel.org/stable/c/7721221e87d25c9840d9ca6b986dbdc410d5ce2b
- https://git.kernel.org/stable/c/a7d521cc726f30b8e679a6f36d04b18a8ab3c536
- https://git.kernel.org/stable/c/d82d5303c4c539db86588ffb5dc5b26c3f1513e8
- https://git.kernel.org/stable/c/1da750d1e2140ef43d64d17f301ff6f41b45541e
- https://git.kernel.org/stable/c/46670fb832ee80943715df618632ca13c2e96f2b
- https://git.kernel.org/stable/c/4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5
- https://git.kernel.org/stable/c/7721221e87d25c9840d9ca6b986dbdc410d5ce2b
References
- https://git.kernel.org/stable/c/1da750d1e2140ef43d64d17f301ff6f41b45541e
- https://git.kernel.org/stable/c/46670fb832ee80943715df618632ca13c2e96f2b
- https://git.kernel.org/stable/c/4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5
- https://git.kernel.org/stable/c/7721221e87d25c9840d9ca6b986dbdc410d5ce2b
- https://git.kernel.org/stable/c/a7d521cc726f30b8e679a6f36d04b18a8ab3c536
- https://git.kernel.org/stable/c/d82d5303c4c539db86588ffb5dc5b26c3f1513e8
- https://git.kernel.org/stable/c/1da750d1e2140ef43d64d17f301ff6f41b45541e
- https://git.kernel.org/stable/c/46670fb832ee80943715df618632ca13c2e96f2b
- https://git.kernel.org/stable/c/4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5
- https://git.kernel.org/stable/c/7721221e87d25c9840d9ca6b986dbdc410d5ce2b
- https://git.kernel.org/stable/c/a7d521cc726f30b8e679a6f36d04b18a8ab3c536
- https://git.kernel.org/stable/c/d82d5303c4c539db86588ffb5dc5b26c3f1513e8