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  • Results Type: Overview
  • Keyword (text search): Linux kernel
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There are 3,261 matching records.
Displaying matches 141 through 160.
Vuln ID Summary CVSS Severity
CVE-2021-20261

A race condition was found in the Linux kernels implementation of the floppy disk drive controller driver software. The impact of this issue is lessened by the fact that the default permissions on the floppy device (/dev/fd0) are restricted to root. If the permissions on the device have changed the impact changes greatly. In the default configuration root (or equivalent) permissions are required to attack this flaw.

Published: March 11, 2021; 4:15:11 PM -0500
V3.1: 6.4 MEDIUM
V2.0: 4.4 MEDIUM
CVE-2021-20265

A flaw was found in the way memory resources were freed in the unix_stream_recvmsg function in the Linux kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by exhausting available memory. The highest threat from this vulnerability is to system availability.

Published: March 10, 2021; 11:15:16 AM -0500
V3.1: 5.5 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2021-3411

A flaw was found in the Linux kernel in versions prior to 5.10. A violation of memory access was found while detecting a padding of int3 in the linking state. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Published: March 09, 2021; 3:15:13 PM -0500
V3.1: 6.7 MEDIUM
V2.0: 4.6 MEDIUM
CVE-2021-20268

An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in the way a user running the eBPF script calls dev_map_init_map or sock_map_alloc. This flaw allows a local user to crash the system or possibly escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Published: March 09, 2021; 1:15:15 PM -0500
V3.1: 7.8 HIGH
V2.0: 4.6 MEDIUM
CVE-2021-27365

An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message.

Published: March 07, 2021; 12:15:13 AM -0500
V3.1: 7.8 HIGH
V2.0: 4.6 MEDIUM
CVE-2021-27364

An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.

Published: March 07, 2021; 12:15:13 AM -0500
V3.1: 7.1 HIGH
V2.0: 3.6 LOW
CVE-2021-27363

An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.

Published: March 06, 2021; 11:15:13 PM -0500
V3.1: 4.4 MEDIUM
V2.0: 3.6 LOW
CVE-2021-28039

An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.

Published: March 05, 2021; 1:15:13 PM -0500
V3.1: 6.5 MEDIUM
V2.0: 2.1 LOW
CVE-2021-28038

An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.

Published: March 05, 2021; 1:15:13 PM -0500
V3.1: 6.5 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2020-25639

A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC. This flaw allows a local user to crash the system.

Published: March 04, 2021; 5:15:13 PM -0500
V3.1: 4.4 MEDIUM
V2.0: 4.9 MEDIUM
CVE-2020-14372

A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.

Published: March 03, 2021; 12:15:11 PM -0500
V3.1: 7.5 HIGH
V2.0: 6.2 MEDIUM
CVE-2021-20194

There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation.

Published: February 23, 2021; 6:15:13 PM -0500
V3.1: 7.8 HIGH
V2.0: 4.6 MEDIUM
CVE-2021-20226

A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.

Published: February 23, 2021; 12:15:13 PM -0500
V3.1: 7.8 HIGH
V2.0: 6.1 MEDIUM
CVE-2020-35499

A NULL pointer dereference flaw in Linux kernel versions prior to 5.11 may be seen if sco_sock_getsockopt function in net/bluetooth/sco.c do not have a sanity check for a socket connection, when using BT_SNDMTU/BT_RCVMTU for SCO sockets. This could allow a local attacker with a special user privilege to crash the system (DOS) or leak kernel internal information.

Published: February 19, 2021; 3:15:12 PM -0500
V3.1: 6.7 MEDIUM
V2.0: 7.2 HIGH
CVE-2020-24485

Improper conditions check in the Intel(R) FPGA OPAE Driver for Linux before kernel version 4.17 may allow an authenticated user to potentially enable escalation of privilege via local access.

Published: February 17, 2021; 9:15:17 AM -0500
V3.1: 7.8 HIGH
V2.0: 4.4 MEDIUM
CVE-2020-12364

Null pointer reference in some Intel(R) Graphics Drivers for Windows* before version 26.20.100.7212 and before version Linux kernel version 5.5 may allow a privileged user to potentially enable a denial of service via local access.

Published: February 17, 2021; 9:15:15 AM -0500
V3.1: 5.5 MEDIUM
V2.0: 2.1 LOW
CVE-2020-12363

Improper input validation in some Intel(R) Graphics Drivers for Windows* before version 26.20.100.7212 and before Linux kernel version 5.5 may allow a privileged user to potentially enable a denial of service via local access.

Published: February 17, 2021; 9:15:15 AM -0500
V3.1: 5.5 MEDIUM
V2.0: 2.1 LOW
CVE-2020-12362

Integer overflow in the firmware for some Intel(R) Graphics Drivers for Windows * before version 26.20.100.7212 and before Linux kernel version 5.5 may allow a privileged user to potentially enable an escalation of privilege via local access.

Published: February 17, 2021; 9:15:15 AM -0500
V3.1: 7.8 HIGH
V2.0: 4.6 MEDIUM
CVE-2021-26934

An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry.

Published: February 16, 2021; 9:15:13 PM -0500
V3.1: 7.8 HIGH
V2.0: 4.6 MEDIUM
CVE-2021-26932

An issue was discovered in the Linux kernel 3.2 through 5.10.16, as used by Xen. Grant mapping operations often occur in batch hypercalls, where a number of operations are done in a single hypercall, the success or failure of each one is reported to the backend driver, and the backend driver then loops over the results, performing follow-up actions based on the success or failure of each operation. Unfortunately, when running in PV mode, the Linux backend drivers mishandle this: Some errors are ignored, effectively implying their success from the success of related batch elements. In other cases, errors resulting from one batch element lead to further batch elements not being inspected, and hence successful ones to not be possible to properly unmap upon error recovery. Only systems with Linux backends running in PV mode are vulnerable. Linux backends run in HVM / PVH modes are not vulnerable. This affects arch/*/xen/p2m.c and drivers/xen/gntdev.c.

Published: February 16, 2021; 9:15:13 PM -0500
V3.1: 5.5 MEDIUM
V2.0: 1.9 LOW