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CVE-2019-19318

Status Candidate

Overview

In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause an rwsem_down_write_slowpath use-after-free because (in rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags returns an already freed pointer,

Related Files

Ubuntu Security Notice USN-4414-1
Posted Jul 3, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4414-1 - It was discovered that the network block device implementation in the Linux kernel did not properly check for error conditions in some situations. An attacker could possibly use this to cause a denial of service. It was discovered that the btrfs file system implementation in the Linux kernel did not properly validate file system metadata in some situations. An attacker could use this to construct a malicious btrfs image that, when mounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2019-12380, CVE-2019-16089, CVE-2019-19039, CVE-2019-19318, CVE-2019-19377, CVE-2019-19462, CVE-2019-19813, CVE-2019-19816, CVE-2020-10711, CVE-2020-12770, CVE-2020-13143
SHA-256 | ec1a7baec52bd131ecb393a55700b5d470ac7a5dd70696941fbd4f55b47787c4
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