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CVE-2020-8992

Status Candidate

Overview

ext4_protect_reserved_inode in fs/ext4/block_validity.c in the Linux kernel through 5.5.3 allows attackers to cause a denial of service (soft lockup) via a crafted journal size.

Related Files

Ubuntu Security Notice USN-4419-1
Posted Jul 8, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4419-1 - It was discovered that a race condition existed in the Precision Time Protocol implementation in the Linux kernel, leading to a use-after- free vulnerability. A local attacker could possibly use this to cause a denial of service or possibly execute arbitrary code. Matthew Sheets discovered that the SELinux network label handling implementation in the Linux kernel could be coerced into de-referencing a NULL pointer. A remote attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2020-10690, CVE-2020-10711, CVE-2020-12770, CVE-2020-13143, CVE-2020-8992
SHA-256 | 4da1e70f72813a472a68df996a4ae3d56a0d2cc5f549bb57117ac1b67dbd4036
Ubuntu Security Notice USN-4344-1
Posted Apr 29, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4344-1 - It was discovered that the Intel Wi-Fi driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service. It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did not properly deallocate memory in certain situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-16234, CVE-2019-19051, CVE-2019-19768, CVE-2020-10942, CVE-2020-8648, CVE-2020-8992, CVE-2020-9383
SHA-256 | 8843a25d79794069c7f4af8f0b7bc644c52469c455abf6857c3eb07ff7d996f0
Ubuntu Security Notice USN-4342-1
Posted Apr 29, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4342-1 - Al Viro discovered that the Linux kernel for s390x systems did not properly perform page table upgrades for kernel sections that use secondary address mode. A local attacker could use this to cause a denial of service or execute arbitrary code. It was discovered that the Intel Wi-Fi driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-16234, CVE-2019-19768, CVE-2020-10942, CVE-2020-11884, CVE-2020-8648, CVE-2020-8992, CVE-2020-9383
SHA-256 | 8be453bd452ae15bb83b01ddb47f279540dafd5d10a9322ef239871e73451623
Ubuntu Security Notice USN-4324-1
Posted Apr 8, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4324-1 - Al Viro discovered that the vfs layer in the Linux kernel contained a use- after-free vulnerability. A local attacker could use this to cause a denial of service or possibly expose sensitive information. Shijie Luo discovered that the ext4 file system implementation in the Linux kernel did not properly check for a too-large journal size. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-8428, CVE-2020-8992
SHA-256 | 3354b82b5136c0f1f9db6f7e2c046652c69628e3bd2119247ececc242c70ea9e
Ubuntu Security Notice USN-4318-1
Posted Apr 7, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4318-1 - Al Viro discovered that the vfs layer in the Linux kernel contained a use- after-free vulnerability. A local attacker could use this to cause a denial of service or possibly expose sensitive information. Gustavo Romero and Paul Mackerras discovered that the KVM implementation in the Linux kernel for PowerPC processors did not properly keep guest state separate from host state. A local attacker in a KVM guest could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-8428, CVE-2020-8834, CVE-2020-8992
SHA-256 | 86b66a0e16466cfadcf6be3fd2d07b86ec2bbb7652f0c5c35dc6e0c95a9a6ab5
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