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CVE-2021-29650

kernel: lack a full memory barrier upon the assignment of a new table value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h may lead to DoS

An issue was discovered in the Linux kernel before 5.11.11. The netfilter subsystem allows attackers to cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h lack a full memory barrier upon the assignment of a new table value, aka CID-175e476b8cdf.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 1 more
Products
Debian Linux Fedora Linux Kernel and 2 more
CVE-2021-29154

kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation

BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 2 more
Products
Debian Linux Fedora Linux Kernel and 19 more
CVE-2021-27365

kernel: heap buffer overflow in the iSCSI subsystem

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.

CVSS 3.1 · 7.8 High EPSS 2.1% KEV · Not listed
Vendors
Debian Linux Netapp and 2 more
Products
Debian Linux Linux Kernel Cloud Backup and 10 more
CVE-2021-27364

kernel: out-of-bounds read in libiscsi module

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.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Linux and 3 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 11 more
CVE-2021-27363

kernel: iscsi: unrestricted access to sessions and handles

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.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Linux Netapp and 1 more
Products
Debian Linux Linux Kernel Cloud Backup and 7 more
CVE-2021-22543

Improper memory handling in Linux KVM

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 2 more
Products
Debian Linux Fedora Linux Kernel and 26 more
CVE-2021-20265

kernel: increase slab leak leads to DoS

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.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Linux Oracle Redhat
Products
Linux Kernel Tekelec Platform Distribution Enterprise Linux and 2 more
CVE-2021-20188

podman: container users permissions are not respected in privileged containers

A flaw was found in podman before 1.7.0. File permissions for non-root users running in a privileged container are not correctly checked. This flaw can be abused by a low-privileged user inside the container to access any other file in the container, even if owned by the root user inside the container. It does not allow to directly escape the container, though being a privileged container means that a lot of security features are disabled when running the container. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS 3.1 · 7.0 High EPSS < 1% KEV · Not listed
Vendors
Podman Project Redhat
Products
Podman Enterprise Linux Openshift Container Platform and 2 more
CVE-2020-9633

flash-plugin: Arbitrary Code Execution vulnerability (APSB20-30)

Adobe Flash Player Desktop Runtime 32.0.0.371 and earlier, Adobe Flash Player for Google Chrome 32.0.0.371 and earlier, and Adobe Flash Player for Microsoft Edge and Internet Explorer 32.0.0.330 and earlier have an use after free vulnerability. Successful exploitation could lead to arbitrary code execution.

CVSS 3.1 · 9.8 Critical EPSS 7.7% KEV · Not listed
Vendors
Adobe Apple Google and 3 more
Products
Flash Player Flash Player Desktop Runtime Macos and 6 more
CVE-2020-9383

kernel: out-of-bounds read in set_fdc in drivers/block/floppy.c

An issue was discovered in the Linux kernel 3.16 through 5.5.6. set_fdc in drivers/block/floppy.c leads to a wait_til_ready out-of-bounds read because the FDC index is not checked for errors before assigning it, aka CID-2e90ca68b0d2.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Linux and 3 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 13 more
CVE-2020-8945

proglottis/gpgme: Use-after-free in GPGME bindings during container image pull

The proglottis Go wrapper before 0.1.1 for the GPGME library has a use-after-free, as demonstrated by use for container image pulls by Docker or CRI-O. This leads to a crash or potential code execution during GPG signature verification.

CVSS 3.1 · 7.5 High EPSS 5.1% KEV · Not listed
Vendors
Fedoraproject Gpgme Project Redhat
Products
Fedora Gpgme Enterprise Linux and 9 more
CVE-2020-8649

kernel: invalid read location in vgacon_invert_region function in drivers/video/console/vgacon.c

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vgacon_invert_region function in drivers/video/console/vgacon.c.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Linux Opensuse and 1 more
Products
Debian Linux Linux Kernel Leap and 3 more
CVE-2020-8647

kernel: out-of-bounds read in in vc_do_resize function in drivers/tty/vt/vt.c

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vc_do_resize function in drivers/tty/vt/vt.c.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Linux Opensuse and 1 more
Products
Debian Linux Linux Kernel Leap and 3 more
CVE-2020-8608

QEMU: Slirp: potential OOB access due to unsafe snprintf() usages

In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer overflow in later code.

CVSS 3.1 · 5.6 Medium EPSS 2.5% KEV · Not listed
Vendors
Debian Libslirp Project Opensuse and 1 more
Products
Debian Linux Libslirp Leap and 8 more
CVE-2020-7053

kernel: use-after-free in i915_ppgtt_close in drivers/gpu/drm/i915/i915_gem_gtt.c

In the Linux kernel 4.14 longterm through 4.14.165 and 4.19 longterm through 4.19.96 (and 5.x before 5.2), there is a use-after-free (write) in the i915_ppgtt_close function in drivers/gpu/drm/i915/i915_gem_gtt.c, aka CID-7dc40713618c. This is related to i915_gem_context_destroy_ioctl in drivers/gpu/drm/i915/i915_gem_context.c.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Linux Redhat
Products
Linux Kernel Enterprise Linux Rhel Extras Rt
CVE-2020-7039

QEMU: slirp: OOB buffer access while emulating tcp protocols in tcp_emu()

tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.

CVSS 3.1 · 5.6 Medium EPSS 3.6% KEV · Not listed
Vendors
Debian Libslirp Project Opensuse and 2 more
Products
Debian Linux Libslirp Leap and 9 more
CVE-2020-6831

usrsctp: Buffer overflow in AUTH chunk input validation

A buffer overflow could occur when parsing and validating SCTP chunks in WebRTC. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

CVSS 3.1 · 9.8 Critical EPSS 5.8% KEV · Not listed
Vendors
Canonical Debian Mozilla and 2 more
Products
Ubuntu Linux Debian Linux Firefox and 7 more
CVE-2020-6576

chromium-browser: Use after free in offscreen canvas

Use after free in offscreen canvas in Google Chrome prior to 85.0.4183.102 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

CVSS 3.1 · 8.8 High EPSS 1.6% KEV · Not listed
Vendors
Debian Fedoraproject Google and 2 more
Products
Debian Linux Fedora Chrome and 3 more