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EUVD-2018-1875 · Published Jun 5, 2018
The Linux Kernel versions 4.14, 4.15, and 4.16 has a null pointer dereference which can result in an out of memory (OOM) killing of large mlocked processes. The issue arises from an oom killed process's final thread calling exit_mmap(), which calls munlock_vma_pages_all() for mlocked vmas.This can happen synchronously with the oom reaper's unmap_page_range() since the vma's VM_LOCKED bit is cleared before munlocking (to determine if any other vmas share the memory and are mlocked).
Technologies
Linux Linux Kernel
Weaknesses
CWE-476
CVSS scores
- v3.05.5
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - v2.04.9
AV:L/AC:L/Au:N/C:N/I:N/A:C
MITRE ATT&CK
InferredWhere this vulnerability fits in an attack
Privilege Escalation
References
- http://seclists.org/oss-sec/2018/q2/67
- http://www.securityfocus.com/bid/104397
- https://access.redhat.com/errata/RHSA-2018:2948
- https://access.redhat.com/security/cve/cve-2018-1000200
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=27ae357fa82be5ab73b2ef8d39dcb8ca2563483a
- https://marc.info/?l=linux-kernel&m=152400522806945
Potentially impacted assets
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