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CVE-2023-0468

Status Candidate

Overview

A use-after-free flaw was found in io_uring/poll.c in io_poll_check_events in the io_uring subcomponent in the Linux Kernel due to a race condition of poll_refs. This flaw may cause a NULL pointer dereference.

Related Files

Ubuntu Security Notice USN-6072-1
Posted May 11, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6072-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for this CVE, kernel support for the TCINDEX classifier has been removed. Lin Ma discovered a race condition in the io_uring subsystem in the Linux kernel, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-0386, CVE-2023-0468, CVE-2023-1829, CVE-2023-1859, CVE-2023-23455, CVE-2023-26545
SHA-256 | 464784fc1b864509cd7743efd768c18ef1040022ac031c3c8fa8e70d3c797def
Ubuntu Security Notice USN-6071-1
Posted May 11, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6071-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for this CVE, kernel support for the TCINDEX classifier has been removed. Lin Ma discovered a race condition in the io_uring subsystem in the Linux kernel, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-2590, CVE-2022-3303, CVE-2022-3586, CVE-2022-40307, CVE-2022-4095, CVE-2022-4662, CVE-2023-0386, CVE-2023-0468, CVE-2023-1829, CVE-2023-1859, CVE-2023-23455, CVE-2023-26545
SHA-256 | a8d674de4142afe5b10e10c26e6abb74259bba061201962b8a068983374d9c79
Ubuntu Security Notice USN-6024-1
Posted Apr 19, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6024-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Lin Ma discovered a race condition in the io_uring subsystem in the Linux kernel, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-3424, CVE-2022-41218, CVE-2022-47929, CVE-2023-0468, CVE-2023-1032, CVE-2023-1281, CVE-2023-22997, CVE-2023-26545, CVE-2023-26606, CVE-2023-28328
SHA-256 | d6d7c454af8ca99a9c4577550c177215f40f6030519b194c5e33fcd3b971f7d8
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