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Unrated severityNVD Advisory· Published Mar 27, 2025· Updated May 4, 2025

block, bfq: fix uaf for bfqq in bic_set_bfqq()

CVE-2023-52983

Description

In the Linux kernel, the following vulnerability has been resolved:

block, bfq: fix uaf for bfqq in bic_set_bfqq()

After commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'"), bic->bfqq will be accessed in bic_set_bfqq(), however, in some context bic->bfqq will be freed, and bic_set_bfqq() is called with the freed bic->bfqq.

Fix the problem by always freeing bfqq after bic_set_bfqq().

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Affected products

89

Patches

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