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{"affected_release": [{"advisory": "RHSA-2022:5344", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-372.13.1.rt7.170.el8_6", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-06-28T00:00:00Z"}, {"advisory": "RHSA-2022:5316", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-372.13.1.el8_6", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-06-30T00:00:00Z"}, {"advisory": "RHSA-2022:5316", "cpe": "cpe:/o:redhat:rhev_hypervisor:4.4::el8", "package": "kernel-0:4.18.0-372.13.1.el8_6", "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8", "release_date": "2022-06-30T00:00:00Z"}], "bugzilla": {"description": "kernel: out-of-bounds read in fbcon_get_font function", "id": "1899177", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1899177"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H", "status": "verified"}, "cwe": "CWE-125", "details": ["A buffer over-read (at the framebuffer layer) in the fbcon code in the Linux kernel before 5.8.15 could be used by local attackers to read kernel memory, aka CID-6735b4632def.", "An out-of-bounds (OOB) memory access flaw was found in fbcon_get_font() in drivers/video/fbdev/core/fbcon.c in fbcon driver module in the Linux kernel. A bound check failure allows a local attacker with special user privilege to gain access to out-of-bounds memory, leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to integrity and system availability."], "mitigation": {"lang": "en:us", "value": "Add 'nomodeset' option as kernel boot parameter to disable frame buffering (edit /etc/default/grub, and run 'grub2-mkconfig -o /boot/grub2/grub.cfg' and reboot).\n~~~\n# cat /proc/cmdline \nBOOT_IMAGE=(hd0,msdos1)/vmlinuz-4.18.0-147.el8.x86_64 root=/dev/mapper/rhel_rhel8u2--1-root ro crashkernel=auto resume=/dev/mapper/rhel_rhel8u2--1-swap rd.lvm.lv=rhel_rhel8u2-1/root rd.lvm.lv=rhel_rhel8u2-1/swap nomodeset\n# ls -l /dev/fb*\nls: cannot access '/dev/fb*': No such file or directory\n~~~"}, "name": "CVE-2020-28915", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2020-11-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-28915\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-28915"], "threat_severity": "Moderate"}