UBUNTU-CVE-2023-2235
A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation. The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability. We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.
02 / AFFECTED SOFTWARE
Affected packages
17 explicit affected versions
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10 explicit affected versions
26 explicit affected versions
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13 explicit affected versions
7 explicit affected versions
24 explicit affected versions
10 explicit affected versions
5 explicit affected versions
12 explicit affected versions
44 explicit affected versions
16 explicit affected versions
13 explicit affected versions
17 explicit affected versions
37 explicit affected versions
38 explicit affected versions
21 explicit affected versions
9 explicit affected versions
21 explicit affected versions
11 explicit affected versions
28 explicit affected versions
3 explicit affected versions
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1 explicit affected versions
26 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation. The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability. We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/fd0815f632c24878e325821943edccc7fde947a2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2
- https://kernel.dance/fd0815f632c24878e325821943edccc7fde947a2
- https://ubuntu.com/security/CVE-2023-2235
- https://ubuntu.com/security/notices/USN-6175-1
- https://ubuntu.com/security/notices/USN-6186-1
- https://ubuntu.com/security/notices/USN-6300-1
- https://ubuntu.com/security/notices/USN-6311-1
- https://ubuntu.com/security/notices/USN-6332-1
- https://ubuntu.com/security/notices/USN-6347-1
- https://ubuntu.com/security/notices/USN-6385-1
- https://www.cve.org/CVERecord?id=CVE-2023-2235