CVE-2023-2235
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedMay 1, 2023
First seenMay 1, 2023
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel5.15.104, 6.1.21, 6.2.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.13 ≤ v < 5.15.104, 5.16 ≤ v < 6.1.21, 6.2 ≤ v < 6.2.8 | 5.15.104, 6.1.21, 6.2.8 |
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