Bug 2293231 (CVE-2021-47595)

Summary: CVE-2021-47595 kernel: net/sched: sch_ets: don't remove idle classes from the round-robin list
Product: [Other] Security Response Reporter: Avinash Hanwate <ahanwate>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar, ymittal
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: kernel 5.10.88, kernel 5.15.11 Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in the Linux kernel's net/sched component in the sch_ets.c file, where idle classes were incorrectly removed from the round-robin list. This issue arises when the queue length is not properly checked, potentially leading to a use-after-free situation in net/sched that results in kernel crashes.
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Bug Blocks: 2293209    

Description Avinash Hanwate 2024-06-20 10:43:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net/sched: sch_ets: don&#39;t remove idle classes from the round-robin list

The Linux kernel CVE team has assigned CVE-2021-47595 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024061920-CVE-2021-47595-e9f3@gregkh/T