CVE-2018-20669
An issue where a provided address with access_ok() is not checked was discovered in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the Linux kernel through 4.19.13. A local attacker can craft a malicious IOCTL function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation.
02 / AFFECTED SOFTWARE
Affected packages
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In i915_gem_execbuffer2_ioctl of i915_gem_execbuffer.c, there is a possible arbitrary kernel memory write due to a missing validation of a userspace pointer. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
An issue where a provided address with access_ok() is not checked was discovered in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the Linux kernel through 4.19.13. A local attacker can craft a malicious IOCTL function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation.
05 / REFERENCES
Further evidence
- https://android.googlesource.com/kernel/common/+/594cc251fdd0d231d342d88b2fdff4bc42fb0690
- https://source.android.com/security/bulletin/2020-07-01
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/log/drivers/gpu/drm/i915/i915_gem_execbuffer.c
- http://lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.html
- http://www.openwall.com/lists/oss-security/2019/01/23/6
- http://www.securityfocus.com/bid/106748
- https://access.redhat.com/security/cve/cve-2018-20669
- https://security.netapp.com/advisory/ntap-20190404-0002/
- https://support.f5.com/csp/article/K32059550
- https://usn.ubuntu.com/4485-1/