CVE-2023-28464 - Double Free

Severity

78%

Complexity

18%

Confidentiality

98%

hci_conn_cleanup in net/bluetooth/hci_conn.c in the Linux kernel through 6.2.9 has a use-after-free (observed in hci_conn_hash_flush) because of calls to hci_dev_put and hci_conn_put. There is a double free that may lead to privilege escalation.

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 1 year ago

2023-03-31 16:15:00

Last updated 1 year ago

2023-12-22 21:04:00

Affected Software

Linux Kernel

References

https://lore.kernel.org/lkml/[email protected]/

https://www.openwall.com/lists/oss-security/2023/03/28/2

https://www.openwall.com/lists/oss-security/2023/03/28/3

https://lore.kernel.org/lkml/[email protected]/

Mailing List, Patch

https://www.openwall.com/lists/oss-security/2023/03/28/2

Mailing List, Patch

https://www.openwall.com/lists/oss-security/2023/03/28/3

Mailing List

https://security.netapp.com/advisory/ntap-20230517-0004/

https://security.netapp.com/advisory/ntap-20230517-0004/

Third Party Advisory

https://lore.kernel.org/lkml/20230309074645.74309-1-wzhmmmmm%40gmail.com/

https://lore.kernel.org/lkml/20230309074645.74309-1-wzhmmmmm%40gmail.com/

Mailing List, Patch

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