get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x...
Vulnerability Description
get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://www.openwall.com/lists/oss-security/2020/09/08/4
- https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2
- https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7
- http://www.openwall.com/lists/oss-security/2020/09/10/4
- https://security.netapp.com/advisory/ntap-20201001-0003/
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CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.