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MitreCVELIST:CVE-2020-25221HistorySep 10, 2020 - 1:39 p.m.
CVE-2020-25221
2020-09-1013:39:59
mitre
www.cve.org
10
linux kernel
privilege escalation
gate page handling
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.
References
www.openwall.com/lists/oss-security/2020/09/10/4
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7
git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a
git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2
security.netapp.com/advisory/ntap-20201001-0003/
www.openwall.com/lists/oss-security/2020/09/08/4
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