CVE-2021-3640

kernel: use-after-free vulnerability in function sco_sock_sendmsg()

A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.

CVSS 3.1 · 7.0 High EPSS < 1% KEV · Not listed

Vendors

Canonical Debian Fedoraproject and 3 more

Products

Ubuntu Linux Debian Linux Fedora and 20 more

CVE-2021-3635

kernel: flowtable list del corruption with kernel BUG at lib/list_debug.c:50

A flaw was found in the Linux kernel netfilter implementation in versions prior to 5.5-rc7. A user with root (CAP_SYS_ADMIN) access is able to panic the system when issuing netfilter netflow commands.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Linux Redhat

Products

Fedora Linux Kernel Enterprise Linux

CVE-2021-3612

kernel: joydev: zero size passed to joydev_handle_JSIOCSBTNMAP()

An out-of-bounds memory write flaw was found in the Linux kernel's joystick devices subsystem in versions before 5.9-rc1, in the way the user calls ioctl JSIOCSBTNMAP. This flaw allows a local user to crash the system or possibly escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Debian Fedoraproject Linux and 3 more

Products

Debian Linux Fedora Linux Kernel and 23 more

CVE-2021-3609

kernel: race condition in net/can/bcm.c leads to local privilege escalation

.A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in the CAN subsystem to corrupt memory, crash the system or escalate privileges. This race condition in net/can/bcm.c in the Linux kernel allows for local privilege escalation to root.

CVSS 3.1 · 7.0 High EPSS < 1% KEV · Not listed

Vendors

Linux Netapp Redhat

Products

Linux Kernel H300e H300e Firmware and 43 more

CVE-2021-3600

kernel: eBPF 32-bit source register truncation on div/mod

It was discovered that the eBPF implementation in the Linux kernel did not properly track bounds information for 32 bit registers when performing div and mod operations. A local attacker could use this to possibly execute arbitrary code.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Canonical Fedoraproject Linux and 1 more

Products

Ubuntu Linux Fedora Linux Kernel and 1 more

CVE-2021-3573

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

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.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Linux Redhat

Products

Fedora Linux Kernel Enterprise Linux and 1 more

CVE-2021-3564

kernel: double free in bluetooth subsystem when the HCI device initialization fails

A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the system. This flaw affects all the Linux kernel versions starting from 3.13.

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-2021-3506

kernel: Out of bounds memory access bug in get_next_net_page() in fs/f2fs/node.c

An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Debian Linux Netapp

Products

Debian Linux Linux Kernel Cloud Backup and 17 more

CVE-2021-3501

kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run

A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Linux Netapp and 1 more

Products

Fedora Linux Kernel Cloud Backup and 25 more

CVE-2021-3491

Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT bypass

The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/<PID>/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b ("io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c ("io_uring: add IORING_OP_PROVIDE_BUFFERS") (v5.7-rc1).

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Canonical Linux

Products

Ubuntu Linux Linux Kernel

CVE-2021-3490

Linux kernel eBPF bitwise ops ALU32 bounds tracking

The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e ("bpf: Fix alu32 const subreg bound tracking on bitwise operations") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 ("bpf:Fix a verifier failure with xor") ( 5.10-rc1).

CVSS 3.1 · 7.8 High EPSS 27.4% KEV · Not listed

Vendors

Canonical Linux

Products

Ubuntu Linux Linux Kernel

CVE-2021-3489

Linux kernel eBPF RINGBUF map oversized allocation

The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee ("bpf, ringbuf: Deny reserve of buffers larger than ringbuf") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it") (v5.8-rc1).

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Canonical Linux Redhat

Products

Ubuntu Linux Linux Kernel Enterprise Linux

CVE-2021-3483

kernel: use-after-free in nosy driver in nosy_ioctl() in drivers/firewire/nosy.c when a device is added twice

A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions before kernel 5.12-rc6 are affected

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Debian Linux Netapp

Products

Debian Linux Linux Kernel Cloud Backup and 16 more

CVE-2021-3444

Linux kernel bpf verifier incorrect mod32 truncation

The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for mod32 dst reg wrt zero") and in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Canonical Debian Linux

Products

Ubuntu Linux Debian Linux Linux Kernel

CVE-2021-3428

kernel: integer overflow in ext4_es_cache_extent

A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an integer overflow, A local attacker with a special user privilege may cause a system crash problem which can lead to an availability threat.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Linux Redhat

Products

Linux Kernel Enterprise Linux

CVE-2021-3411

kernel: broken KRETPROBES reports corruption of .text section while running a FTRACE stress tester

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.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Vendors

Linux Redhat

Products

Linux Kernel Enterprise Linux

CVE-2021-3348

kernel: Use-after-free in ndb_queue_rq() in drivers/block/nbd.c

nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup, aka CID-b98e762e3d71.

CVSS 3.1 · 7.0 High EPSS < 1% KEV · Not listed

Vendors

Debian Linux Redhat

Products

Debian Linux Linux Kernel Enterprise Linux

CVE-2021-3178

kernel: path traversal in fs/nfsd/nfs3xdr.c may lead to Information Disclosure or RCE

fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior

CVSS 3.1 · 6.5 Medium EPSS 2.4% KEV · Not listed

Vendors

Debian Fedoraproject Linux

Products

Debian Linux Fedora Linux Kernel

CVE-2021-3100

Log4j hot patch package privilege escalation

The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowing it to escalate privileges.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Amazon Linux

Products

Log4jhotpatch Linux Kernel

CVE-2021-39823

svg-native-viewer Heap Buffer overflow Vulnerability

Adobe svg-native-viewer 8182d14dfad5d1e10f53ed830328d7d9a3cfa96d and earlier versions are affected by a heap buffer overflow vulnerability due to insecure handling of a malicious .svg file, potentially resulting in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability.

CVSS 3.1 · 7.8 High EPSS 4.2% KEV · Not listed

Vendors

Adobe Linux

Products

Svg-native-viewer Linux Kernel