Vulnerability Details CVE-2022-50329
In the Linux kernel, the following vulnerability has been resolved:
block, bfq: fix uaf for bfqq in bfq_exit_icq_bfqq
Commit 64dc8c732f5c ("block, bfq: fix possible uaf for 'bfqq->bic'")
will access 'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq()
can free bfqq first, and then call bic_set_bfqq(), which will cause uaf.
Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.6%
CVSS Severity
CVSS v3 Score 7.8
References
- https://git.kernel.org/stable/c/1425f1bb5df5239021fd09ebc2a5e8070e705d36
- https://git.kernel.org/stable/c/1ed959fef5b1c6f1a7a3fbea543698c30ebd6678
- https://git.kernel.org/stable/c/246cf66e300b76099b5dbd3fdd39e9a5dbc53f02
- https://git.kernel.org/stable/c/7949b0df3dd9f4817ed4a4e989fa9ee81df6205f
- https://git.kernel.org/stable/c/cfe5b38c37720313eff0dec5517442c7ab3c9a20
Products affected by CVE-2022-50329
-
cpe:2.3:o:linux:linux_kernel:5.15.86
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cpe:2.3:o:linux:linux_kernel:6.0.16
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cpe:2.3:o:linux:linux_kernel:6.1.2
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cpe:2.3:o:linux:linux_kernel:6.2