kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c

A use-after-free flaw was found in u32change in net/sched/clsu32.c in the network subcomponent of the Linux kernel. This flaw allows a local attacker to crash the system, cause a privilege escalation, and leak kernel information...

kernel: bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data

A reference-count flaw was found in the Linux kernel Berkeley Packet Filter BPF sockmap implementation. When processing messages with remaining data, the same Transmission Control Protocol TCP socket reference could be released more than once. A local user running BPF sockmap programs could use...

kernel: bpf: Fix request_sock leak in sk lookup helpers

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix requestsock leak in sk lookup helpers A customer reported a requestsocket leak in a Calico cloud environment. We found that a BPF program was doing a socket lookup with takes a refcnt on the socket and that it was findin...

kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c

A use-after-free flaw was found in u32change in net/sched/clsu32.c in the network subcomponent of the Linux kernel. This flaw allows a local attacker to crash the system, cause a privilege escalation, and leak kernel information...

GSD-2022-1007126 jbd2: fix potential buffer head reference count leak

jbd2: fix potential buffer head reference count leak This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.75 by commit...

GSD-2022-1006887 jbd2: fix potential buffer head reference count leak

jbd2: fix potential buffer head reference count leak This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v6.0.3 by commit...

MGASA-2022-0418 Updated wayland packages fix security vulnerability

An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wlshm buffer objects, or if it...

kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c

A use-after-free flaw was found in u32change in net/sched/clsu32.c in the network subcomponent of the Linux kernel. This flaw allows a local attacker to crash the system, cause a privilege escalation, and leak kernel information...

(Pwn2Own) Linux Kernel io_uring Improper Update of Reference Count Privilege Escalation Vulnerability

This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the iouring API. The...

ALPINE-CVE-2022-2928

In ISC DHCP 4.4.0 - 4.4.3, ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16-P1, when the function optioncodehashlookup is called from addoption, it increases the option's refcount field. However, there is not a corresponding call to optiondereference to decrement the refcount field. The function addoption is on...

DEBIAN-CVE-2022-2928

In ISC DHCP 4.4.0 - 4.4.3, ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16-P1, when the function optioncodehashlookup is called from addoption, it increases the option's refcount field. However, there is not a corresponding call to optiondereference to decrement the refcount field. The function addoption is on...

[slackware-security] dhcp

New dhcp packages are available for Slackware 14.0, 14.1, 14.2, 15.0, and -current to fix security issues. Here are the details from the Slackware 15.0 ChangeLog: patches/packages/dhcp-4.4.3P1-i586-1slack15.0.txz: Upgraded. This update fixes two security issues: Corrected a reference count leak...

CVE-2022-2928

In ISC DHCP 4.4.0 - 4.4.3, ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16-P1, when the function optioncodehashlookup is called from addoption, it increases the option's refcount field. However, there is not a corresponding call to optiondereference to decrement the refcount field. The function addoption is on...

Ubuntu 16.04 ESM : Wayland vulnerability (USN-5614-2)

The remote Ubuntu 16.04 ESM host has packages installed that are affected by a vulnerability as referenced in the USN-5614-2 advisory. USN-5614-1 fixed a vulnerability in Wayland. This update provides the corresponding update for Ubuntu 16.04 ESM. Tenable has extracted the preceding description...

ISC DHCP 代码问题漏洞

ISC DHCP is an open source Dynamic Host Configuration Protocol server software from ISC. A denial of service vulnerability exists in ISC DHCP, which stems from the fact that when the function optioncodehashlookup is called from addoption, it increases the option's refcount field, but does not mak...

SUSE-SU-2022:3463-1 Security update for the Linux Kernel (Live Patch 27 for SLE 15 SP2)

This update for the Linux Kernel 5.3.18-15020024115 fixes several issues. The following security issues were fixed: - CVE-2022-39188: Fixed a race condition between unmapmappingrange and munmap on VMPFNMAP mappings leads to stale TLB entry bsc1203116. - CVE-2022-29581: Fixed an improper Update of...

An internal reference count is held on the buffer pool incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wl_shm buffer objects or if it can coerce the server to create a large number of external references to the buffer storage. With the reference count overflowing a use-after-free can be constructed on the wl_shm_pool tracking structure where values may be incremented or decremented; it may also be possible to construct a limited oracle to leak 4 bytes of server-side memory to the attacking client at a time.

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Huawei EulerOS: Security Advisory for kernel (EulerOS-SA-2022-2384)

The remote host is missing an update for the Huawei EulerOS SPDX-FileCopyrightText: 2022 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

CVE-2021-3782

An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wlshm buffer objects, or if it...

CVE-2021-3782

An internal reference count is held on the buffer pool, incremented every time a new buffer is created from the pool. The reference count is maintained as an int; on LP64 systems this can cause the reference count to overflow if the client creates a large number of wlshm buffer objects, or if it...