kernel: Speculation on pointer arithmetic against bpf_context pointer

A flaw was found in the Linux kernels eBPF verification code. By default accessing the eBPF verifier is only accessible to privileged users with CAPSYSADMIN. A local user with the ability to insert eBPF instructions can use the eBPF verifier to abuse a spectre like flaw where they can infer all...

Security update for the Linux Kernel (important)

openSUSE Security Update: Security update for the Linux Kernel Announcement ID: openSUSE-SU-2021:0843-1 Rating: important References: 1087082 1133021 1152457 1152489 1155518 1156395 1164648 1177666 1178418 1179519 1179827 1179851 1182378 1182999 1183346 1183976 1184259 1185428 1185495 1185589...

DEBIAN-CVE-2021-3490

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...

CVE-2021-3490

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...

DEBIAN-CVE-2021-33200

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corne...

UBUNTU-CVE-2021-33200

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corne...

CVE-2021-33200

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corne...

SUSE-SU-2021:1733-1 Security update for the Linux Kernel (Live Patch 17 for SLE 12 SP5)

This update for the Linux Kernel 4.12.14-12266 fixes several issues. The following security issues were fixed: - CVE-2020-36322: Fixed an issue inside the FUSE filesystem implementation where fusedogetattr calls makebadinode in inappropriate situations, could have caused a system crash. NOTE: the...

PT-2021-4223 · Linux +7 · Linux Kernel +7

Name of the Vulnerable Software and Affected Versions: Linux kernel versions through 5.12.7 Description: The issue is related to a buffer overflow in the kernel/bpf/verifier.c component of the Linux kernel, allowing an attacker to perform out-of-bounds reads and writes in kernel memory. This can...

CVE-2021-31440

An out-of-bounds access flaw was found in the Linux kernel’s implementation of the eBPF code verifier, where an incorrect register bounds calculation while checking unsigned 32-bit instructions in an eBPF program occurs.. By default accessing the eBPF verifier is only accessible to privileged use...

Updated kernel-linus packages fix security vulnerabilities

This kernel-linus update is based on upstream 5.10.37 and fixes at least the following security issues: It was discovered that the iouring implementation of the Linux kernel did not properly enforce the MAXRWCOUNT limit in some situations. A local attacker could use this to cause a denial of...

SUSE-SU-2021:1605-1 Security update for the Linux Kernel

The SUSE Linux Enterprise 12 SP5 RT kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2020-36312: Fixed an issue within virt/kvm/kvmmain.c that had a kvmiobusunregisterdev memory leak upon a kmalloc failure bnc1184509. - CVE-2021-29650: Fix...

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads leading to disclosure of stack content via side-channel attacks aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.

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SUSE SLES15 Security Update : kernel (SUSE-SU-2021:1573-1)

The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes. The following security bugs were fixed : CVE-2020-36312: Fixed an issue in virt/kvm/kvmmain.c that had a kvmiobusunregisterdev memory leak upon a kmalloc failure bnc1184509. CVE-2021-29650: Fixed an issue...

CVE-2021-31829

A flaw was found in the Linux kernel's eBPF verification code. By default, accessing the eBPF verifier is only accessible to privileged users with CAPSYSADMIN. This flaw allows a local user who can insert eBPF instructions, to use the eBPF verifier to abuse a spectre-like flaw and infer all syste...

AZL-6557 CVE-2021-31829 affecting package kernel for versions less than 5.10.78.1-1

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can...

UBUNTU-CVE-2021-31829

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can...

CVE-2021-31829

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can...

Information disclosure

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can...

CVE-2021-31829

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can...