CVE-2022-2327 - Double Free

Severity

78%

Complexity

18%

Confidentiality

98%

io_uring use work_flags to determine which identity need to grab from the calling process to make sure it is consistent with the calling process when executing IORING_OP. Some operations are missing some types, which can lead to incorrect reference counts which can then lead to a double free. We recommend upgrading the kernel past commit df3f3bb5059d20ef094d6b2f0256c4bf4127a859

CVSS 3.1 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Demo Examples

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
}
free(buf1R2);

Overview

First reported 2 years ago

2022-07-22 10:15:00

Last updated 2 years ago

2022-07-29 19:05:00

Affected Software

Linux Kernel

References

N/A

N/A

N/A

Patch, Third Party Advisory

N/A

Mailing List, Patch, Vendor Advisory

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