CVE - CVE-2021-47111

CVE-ID
CVE-2021-47111	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: xen-netback: take a reference to the RX task thread Do this in order to prevent the task from being freed if the thread returns (which can be triggered by the frontend) before the call to kthread_stop done as part of the backend tear down. Not taking the reference will lead to a use-after-free in that scenario. Such reference was taken before but dropped as part of the rework done in 2ac061ce97f4. Reintroduce the reference taking and add a comment this time explaining why it's needed. This is XSA-374 / CVE-2021-28691.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/107866a8eb0b664675a260f1ba0655010fac1e08 URL:https://git.kernel.org/stable/c/107866a8eb0b664675a260f1ba0655010fac1e08 MISC:https://git.kernel.org/stable/c/6b53db8c4c14b4e7256f058d202908b54a7b85b4 URL:https://git.kernel.org/stable/c/6b53db8c4c14b4e7256f058d202908b54a7b85b4 MISC:https://git.kernel.org/stable/c/caec9bcaeb1a5f03f2d406305355c853af10c13e URL:https://git.kernel.org/stable/c/caec9bcaeb1a5f03f2d406305355c853af10c13e
Assigning CNA
kernel.org
Date Record Created
20240304	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240304)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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