UBUNTU-CVE-2023-3609
A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
02 / AFFECTED SOFTWARE
Affected packages
18 explicit affected versions
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13 explicit affected versions
26 explicit affected versions
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38 explicit affected versions
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22 explicit affected versions
11 explicit affected versions
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28 explicit affected versions
10 explicit affected versions
8 explicit affected versions
5 explicit affected versions
62 explicit affected versions
4 explicit affected versions
51 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
05 / REFERENCES
Further evidence
- https://security.googleblog.com/2023/06/learnings-from-kctf-vrps-42-linux.html
- https://ubuntu.com/security/CVE-2023-3609
- https://ubuntu.com/security/notices/USN-6285-1
- https://ubuntu.com/security/notices/USN-6315-1
- https://ubuntu.com/security/notices/USN-6317-1
- https://ubuntu.com/security/notices/USN-6318-1
- https://ubuntu.com/security/notices/USN-6321-1
- https://ubuntu.com/security/notices/USN-6324-1
- https://ubuntu.com/security/notices/USN-6325-1
- https://ubuntu.com/security/notices/USN-6328-1
- https://ubuntu.com/security/notices/USN-6329-1
- https://ubuntu.com/security/notices/USN-6330-1
- https://ubuntu.com/security/notices/USN-6331-1
- https://ubuntu.com/security/notices/USN-6332-1
- https://ubuntu.com/security/notices/USN-6346-1
- https://ubuntu.com/security/notices/USN-6348-1
- https://ubuntu.com/security/notices/USN-6357-1
- https://ubuntu.com/security/notices/USN-6385-1
- https://ubuntu.com/security/notices/USN-6397-1
- https://www.cve.org/CVERecord?id=CVE-2023-3609