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CVE-2021-33655

Status Candidate

Overview

When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.

Related Files

Ubuntu Security Notice USN-5621-1
Posted Sep 21, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5621-1 - It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of- bounds write. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter subsystem in the Linux kernel did not properly handle rules that truncated packets below the packet header size. When such rules are in place, a remote attacker could possibly use this to cause a denial of service.

tags | advisory, remote, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-33655, CVE-2022-36946
SHA-256 | 40c548696df891b760842604fc704cc1c5c68040fc122ae7115bc694f014d36e
Ubuntu Security Notice USN-5596-1
Posted Sep 5, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5596-1 - Asaf Modelevsky discovered that the Intel 10GbE PCI Express Ethernet driver for the Linux kernel performed insufficient control flow management. A local attacker could possibly use this to cause a denial of service. It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-33061, CVE-2021-33655
SHA-256 | 9717fd4e1b6daa46b6a95f20260d473f01dc55fdd2063c76cfd161c3f60376fd
Ubuntu Security Notice USN-5580-1
Posted Aug 25, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5580-1 - It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the virtual terminal driver in the Linux kernel did not properly handle VGA console font changes, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-33655, CVE-2021-33656, CVE-2022-20368, CVE-2022-36946
SHA-256 | b5ab48b142e19732fa7673c4e8d203c65ddff0c5de2b3f3db3a18f3afe8f08f2
Ubuntu Security Notice USN-5577-1
Posted Aug 24, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5577-1 - Asaf Modelevsky discovered that the Intel 10GbE PCI Express Ethernet driver for the Linux kernel performed insufficient control flow management. A local attacker could possibly use this to cause a denial of service. It was discovered that the framebuffer driver on the Linux kernel did not verify size limits when changing font or screen size, leading to an out-of- bounds write. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-33061, CVE-2021-33655
SHA-256 | 69d4360a8ebb8a22d9a2566544e9b78759027def50510b4fc09d1f602ebd8651
Debian Security Advisory 5191-1
Posted Jul 28, 2022
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5191-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2021-33655, CVE-2022-2318, CVE-2022-26365, CVE-2022-33740, CVE-2022-33741, CVE-2022-33742, CVE-2022-33743, CVE-2022-33744, CVE-2022-34918
SHA-256 | 914eefcc94d369cd1ff3058c3f8c135f235e5f4f9241b7711804c19b9c63953d
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