USN-5086-1: Linux kernel vulnerability

Johan Almbladh discovered that the eBPF JIT implementation for IBM s390x systems in the Linux kernel miscompiled operations in some situations, allowing circumvention of the BPF verifier. A local attacker could use this to cause a denial of service system crash or possibly execute arbitrary code...

CVE-2020-0430

An out of bounds memory read flaw was found in the Linux kernel’s implementation of the eBPF code verifier. A user passing corrupted data to a helper function could access data inside the adjustptrminmaxvals function. By default, the eBPF verifier is only accessible to users with CAPSYSADMIN...

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

A flaw was found in the Linux kernels eBPF implementation. 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 abuse a flaw in eBPF to corrupt memory. The highest threat from this...

SGXRay - Automating Vulnerability Detection for SGX Apps

Intel SGX protects isolated application logic and sensitive data inside an enclave with hardware-based memory encryption. To use such hardware-based security mechanism requires a strict programming model on memory usage， with complex APIs in and out the enclave boundary. Enclave developers are...

OESA-2021-1279 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: there was a null pointer dereference in llcpsockgetname in net/nfc/llcpsock.c and reproduced it in linux-5.13.0-rc2. An unprivileged user can trigger this bug and cause denial of service. Root Cause After creating an nfc socket,...

SUSE SLES15: cluster-md-kmp-rt / dlm-kmp-rt / gfs2-kmp-rt / kernel-devel-rt / etc (SUSE-SU-2021:2426-1)

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2426-1 advisory. The SUSE Linux Enterprise 15 SP2 RT kernel was updated to receive various security and bugfixes. The following security bugs were fixed: -...

OESA-2021-1176 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain...

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13 a branch can be mispredicted (e.g. because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack aka CID-9183671af6db.

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Updated kernel packages fix security vulnerabilities

This kernel update is based on upstream 5.10.46 and fixes at least the following security issues: In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted e.g., because of type confusion and consequently an unprivileged BPF program can read arbitrary memory...

DEBIAN-CVE-2021-33624

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted e.g., because of type confusion and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db...

AZL-6564 CVE-2021-33624 affecting package kernel for versions less than 5.10.78.1-1

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted e.g., because of type confusion and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db...

Type confusion

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted e.g., because of type confusion and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db...

UBUNTU-CVE-2021-33624

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted e.g., because of type confusion and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db...

SUSE SLES15 Security Update : kernel (Live Patch 13 for SLE 15 SP2) (SUSE-SU-2021:2027-1)

The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2027-1 advisory. This update for the Linux Kernel 5.3.18-2464 fixes several issues. The following issues were fixed: - CVE-2021-33200: Enforcing incorrect limit...

SUSE-SU-2021:2057-1 Security update for the Linux Kernel (Live Patch 24 for SLE 15)

This update for the Linux Kernel 4.12.14-15072 fixes several issues. The following security issues were fixed: - CVE-2021-33200: Enforcing incorrect limits for pointer arithmetic operations by the BPF verifier could be abused to perform out-of-bounds reads and writes in kernel memory bsc1186484. ...

SUSE SLED12: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2021:1913-1)

The remote SUSE Linux SLED12 / SLES12 / SLESSAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:1913-1 advisory. The SUSE Linux Enterprise 12 SP5 kernel was updated to receive various security and bugfixes. The following security bugs...

SUSE: Security Advisory (SUSE-SU-2019:1810-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

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...