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CVE-2019-19448

Status Candidate

Overview

In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.

Related Files

Ubuntu Security Notice USN-4578-1
Posted Oct 14, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4578-1 - Hador Manor discovered that the DCCP protocol implementation in the Linux kernel improperly handled socket reuse, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Wen Xu discovered that the XFS file system in the Linux kernel did not properly validate inode metadata in some situations. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2018-10322, CVE-2019-19448, CVE-2020-14314, CVE-2020-16119, CVE-2020-16120, CVE-2020-25212, CVE-2020-26088
MD5 | d9b01e11bdf2b74c3573fcc5c0826039
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