CVE-2026-63803

A flaw was found in the Linux kernel's hdlcppp module. This use-after-free vulnerability occurs because the Point-to-Point Protocol PPP control timers are not properly synchronized before the associated memory is freed. An attacker could potentially exploit this by triggering a race condition,...

CVE-2026-63803

The CVE-2026-63803 has concrete technical details in the Linux kernel: hdlc_ppp timers for PPP LCP/IPCP/IPV6CP in struct ppp are not synchronized on teardown due to a missing .detach callback, causing a use-after-free when a ppp_timer dereferences freed memory. The fix adds a detach helper that c...

CVE-2026-63803 hdlc_ppp: sync per-proto timers before freeing hdlc state

In the Linux kernel, the following vulnerability has been resolved: hdlcppp: sync per-proto timers before freeing hdlc state Each PPP control protocol LCP/IPCP/IPV6CP embedded in struct ppp registers a timer via timersetup. That struct ppp is the hdlc-state allocation, which detachhdlcprotocol...

CVE-2026-63803

In the Linux kernel, the following vulnerability has been resolved: hdlcppp: sync per-proto timers before freeing hdlc state Each PPP control protocol LCP/IPCP/IPV6CP embedded in struct ppp registers a timer via timersetup. That struct ppp is the hdlc-state allocation, which detachhdlcprotocol...

CVE-2026-63803

In the Linux kernel, the following vulnerability has been resolved: hdlcppp: sync per-proto timers before freeing hdlc state Each PPP control protocol LCP/IPCP/IPV6CP embedded in struct ppp registers a timer via timersetup. That struct ppp is the hdlc-state allocation, which detachhdlcprotocol...

Astra Linux – Vulnerability in Linux

A flaw was discovered in the HDLCPPP module of the Linux kernel in versions prior to 5.9-rc7. Memory corruption and a read overflow occur due to improper input validation in the pppcpparsecr function, which can cause the system to crash or lead to a denial of service. The greatest threat posed by...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-004003)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004003 advisory. A flaw was found in the HDLCPPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by improper input validation i...

Unity Linux 20.1070e Security Update: kernel (UTSA-2026-000348)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000348 advisory. A flaw was found in the HDLCPPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by improper input validation i...

SUSE CVE-2020-25643

A flaw was found in the HDLCPPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by improper input validation in the pppcpparsecr function which can cause the system to crash or cause a denial of service. The highest threat from this...

kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow

A flaw was found in the HDLCPPP module of the Linux kernel. Memory corruption and a read overflow is caused by improper input validation in the pppcpparsecr function which can cause the system to crash or cause a denial of service. The highest threat from this vulnerability is to data...

Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-4752-1)

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4752-1 advisory. Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure- connections pairing authentication in the...

USN-4752-1: Linux kernel (OEM) vulnerabilities

Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen discovered that legacy pairing and secure-connections pairing authentication in the Bluetooth protocol could allow an unauthenticated user to complete authentication without pairing credentials via adjacent access. A physically proxima...

USN-4660-2: Linux kernel regression | Cloud Foundry

Severity Unknown Vendor Canonical Ubuntu Versions Affected Canonical Ubuntu 16.04 Description USN-4660-1 fixed vulnerabilities in the Linux kernel. Unfortunately, that update introduced a regression in the software raid10 driver when used with fstrim that could lead to data corruption. This updat...

kernel: improper input validation in ppp_cp_parse_cr function leads to memory corruption and read overflow

A flaw was found in the HDLCPPP module of the Linux kernel. Memory corruption and a read overflow is caused by improper input validation in the pppcpparsecr function which can cause the system to crash or cause a denial of service. The highest threat from this vulnerability is to data...

USN-4658-2: Linux kernel regression

USN-4658-1 fixed vulnerabilities in the Linux kernel. Unfortunately, that update introduced a regression in the software raid10 driver when used with fstrim that could lead to data corruption. This update fixes the problem. Original advisory details: It was discovered that a race condition existe...

Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel regression (USN-4658-2)

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4658-2 advisory. USN-4658-1 fixed vulnerabilities in the Linux kernel. Unfortunately, that update introduced a regression in the software raid10 driver when used with...

Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel regression (USN-4660-2)

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4660-2 advisory. USN-4660-1 fixed vulnerabilities in the Linux kernel. Unfortunately, that update introduced a regression in the software raid10 driver when used with...

USN-4660-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities

It was discovered that a race condition existed in the perf subsystem of the Linux kernel, leading to a use-after-free vulnerability. An attacker with access to the perf subsystem could use this to cause a denial of service system crash or possibly execute arbitrary code. CVE-2020-14351 It was...

Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4660-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4660-1 advisory. It was discovered that a race condition existed in the perf subsystem of the Linux kernel, leading to a use-after-free vulnerability. An...

USN-4657-1: Linux kernel vulnerabilities

Elena Petrova discovered that the pin controller device tree implementation in the Linux kernel did not properly handle string references. A local attacker could use this to expose sensitive information kernel memory. CVE-2020-0427 Daniele Antonioli, Nils Ole Tippenhauer, and Kasper Rasmussen...