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CVE-2020-29568

Status Candidate

Overview

An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.

Related Files

Gentoo Linux Security Advisory 202107-30
Posted Jul 13, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202107-30 - Multiple vulnerabilities have been found in Xen, the worst of which could result in privilege escalation. Versions less than 4.15.0-r1 are affected.

tags | advisory, vulnerability
systems | linux, gentoo
advisories | CVE-2020-29479, CVE-2020-29486, CVE-2020-29487, CVE-2020-29566, CVE-2020-29567, CVE-2020-29568, CVE-2020-29569, CVE-2020-29570, CVE-2020-29571, CVE-2021-0089, CVE-2021-26313, CVE-2021-28687, CVE-2021-28690, CVE-2021-28691, CVE-2021-28692, CVE-2021-28693, CVE-2021-3308
SHA-256 | 36d5f476b51c23defc6f7d17ba7518ef98181a7154a78a23daa94e2802513ab7
Debian Security Advisory 4843-1
Posted Feb 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4843-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2020-27815, CVE-2020-27825, CVE-2020-27830, CVE-2020-28374, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661, CVE-2020-36158, CVE-2021-20177, CVE-2021-3347
SHA-256 | b63fae8d21eadd6fb015db055e5e8e2055c3653fa769dcd8d9d46a56af24ab72
Ubuntu Security Notice USN-4751-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4751-1 - It was discovered that the console keyboard driver in the Linux kernel contained a race condition. A local attacker could use this to expose sensitive information. Minh Yuan discovered that the tty driver in the Linux kernel contained race conditions when handling fonts. A local attacker could possibly use this to expose sensitive information. Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25656, CVE-2020-25668, CVE-2020-25669, CVE-2020-25704, CVE-2020-27673, CVE-2020-27675, CVE-2020-27777, CVE-2020-27815, CVE-2020-27830, CVE-2020-27835, CVE-2020-28588, CVE-2020-28974, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661, CVE-2020-35508
SHA-256 | e9d3e10fdaf8851fce0f2b40b30eae653fe05a491bcde750907baec6b6f2532b
Ubuntu Security Notice USN-4750-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4750-1 - Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25669, CVE-2020-27815, CVE-2020-28588, CVE-2020-28941, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661, CVE-2021-20177
SHA-256 | 244b492047de3dfc8cbaec49a7d3d8b2fa1ece0ca9975986a3b9ca7800cd6c3a
Ubuntu Security Notice USN-4749-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4749-1 - Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25669, CVE-2020-27815, CVE-2020-29374, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661
SHA-256 | c63a6b0b35b3e71cc0cb6d6b81c4d7a6309dedb3ea47cd82b05b2a4b24f23b48
Ubuntu Security Notice USN-4748-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4748-1 - It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. It was discovered that the memory management subsystem in the Linux kernel did not properly handle copy-on-write operations in some situations. A local attacker could possibly use this to gain unintended write access to read-only memory pages. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-27815, CVE-2020-29374, CVE-2020-29568, CVE-2020-29660, CVE-2020-29661
SHA-256 | d67736e2a88e2a48fdcc199d6274d2ea8c794a2e8d9ad3c1542bb81b35eb62ea
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