Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-5294-2)

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5294-2 advisory. It was discovered that the Packet network protocol implementation in the Linux kernel contained a double- free vulnerability. A local attacke...

USN-5294-1 linux vulnerabilities

It was discovered that the Packet network protocol implementation in the Linux kernel contained a double-free vulnerability. A local attacker could use this to cause a denial of service system crash or possibly execute arbitrary code. CVE-2021-22600 Szymon Heidrich discovered that the USB Gadget...

USN-5218-1 linux-oem-5.13 vulnerabilities

Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages. CVE-2021-4002 It was discovered that the eBPF implementation in the Linux...

CVE-2021-4202

A use-after-free flaw was found in ncirequest in net/nfc/nci/core.c in NFC Controller Interface NCI in the Linux kernel. This flaw could allow a local attacker with user privileges to cause a data race problem while the device is getting removed, leading to a privilege escalation problem...

PT-2025-8064

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A issue in the Linux kernel's Bluetooth handling has been identified, specifically in the hci sync function. The problem occurs when the HCI UNREGISTER flag is set, which indicates that...

CVE-2021-4202

A use-after-free flaw was found in ncirequest in net/nfc/nci/core.c in NFC Controller Interface NCI in the Linux kernel. This flaw could allow a local attacker with user privileges to cause a data race problem while the device is getting removed, leading to a privilege escalation problem...

UBUNTU-CVE-2021-4202

A use-after-free flaw was found in ncirequest in net/nfc/nci/core.c in NFC Controller Interface NCI in the Linux kernel. This flaw could allow a local attacker with user privileges to cause a data race problem while the device is getting removed, leading to a privilege escalation problem...

kernel: use-after-free in function hci_sock_bound_ioctl()

A flaw use-after-free in function hcisockboundioctl of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hciunregisterdev together with one of the calls hcisockblacklistadd, hcisockblacklistdel, hcigetconninfo,...

kernel: use-after-free in function hci_sock_bound_ioctl()

A flaw use-after-free in function hcisockboundioctl of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hciunregisterdev together with one of the calls hcisockblacklistadd, hcisockblacklistdel, hcigetconninfo,...

kernel: race condition for removal of the HCI controller

A flaw was found in the Linux kernel’s handling of the removal of Bluetooth HCI controllers. This flaw allows an attacker with a local account to exploit a race condition, leading to corrupted memory and possible privilege escalation. The highest threat from this vulnerability is to...

kernel: race condition for removal of the HCI controller

A flaw was found in the Linux kernel’s handling of the removal of Bluetooth HCI controllers. This flaw allows an attacker with a local account to exploit a race condition, leading to corrupted memory and possible privilege escalation. The highest threat from this vulnerability is to...

kernel: race condition for removal of the HCI controller

A flaw was found in the Linux kernel’s handling of the removal of Bluetooth HCI controllers. This flaw allows an attacker with a local account to exploit a race condition, leading to corrupted memory and possible privilege escalation. The highest threat from this vulnerability is to...

kernel: race condition for removal of the HCI controller

A flaw was found in the Linux kernel’s handling of the removal of Bluetooth HCI controllers. This flaw allows an attacker with a local account to exploit a race condition, leading to corrupted memory and possible privilege escalation. The highest threat from this vulnerability is to...

A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add() hci_sock_blacklist_del() hci_get_conn_info() hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5.

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USN-5044-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities

It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device initialization failure, leading to a double-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. CVE-2021-3564 It was discovered that th...

AZL-6574 CVE-2021-3573 affecting package kernel for versions less than 5.10.78.1-1

A use-after-free in function hcisockboundioctl of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hciunregisterdev together with one of the calls hcisockblacklistadd, hcisockblacklistdel, hcigetconninfo,...

kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

A use-after-free flaw was found in hcisendacl in the bluetooth host controller interface HCI in Linux kernel, where a local attacker with an access rights could cause a denial of service problem on the system The issue results from the object hchan, freed in hcidisconnloglinkcompleteevt, yet stil...

kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

A use-after-free flaw was found in hcisendacl in the bluetooth host controller interface HCI in Linux kernel, where a local attacker with an access rights could cause a denial of service problem on the system The issue results from the object hchan, freed in hcidisconnloglinkcompleteevt, yet stil...

kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

A use-after-free flaw was found in hcisendacl in the bluetooth host controller interface HCI in Linux kernel, where a local attacker with an access rights could cause a denial of service problem on the system The issue results from the object hchan, freed in hcidisconnloglinkcompleteevt, yet stil...

kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

A use-after-free flaw was found in hcisendacl in the bluetooth host controller interface HCI in Linux kernel, where a local attacker with an access rights could cause a denial of service problem on the system The issue results from the object hchan, freed in hcidisconnloglinkcompleteevt, yet stil...