The vulnerability in the kernel/bpf/verifier.c component of the Linux operating system allows a hacker to elevate their privileges to the level of root.

The vulnerability in the kernel component bpf/verifier.c of the Linux operating system is related to writing beyond the buffer boundaries in memory. Exploiting this vulnerability can allow an attacker to elevate their privileges to the root level...

USN-5092-2: Linux kernel vulnerabilities

Valentina Palmiotti discovered that the iouring subsystem in the Linux kernel could be coerced to free adjacent memory. A local attacker could use this to execute arbitrary code. CVE-2021-41073 Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in...

USN-5092-1: Linux kernel vulnerabilities

Valentina Palmiotti discovered that the iouring subsystem in the Linux kernel could be coerced to free adjacent memory. A local attacker could use this to execute arbitrary code. CVE-2021-41073 Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in...

USN-5091-1 linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities

Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. CVE-2021-33624 It was...

USN-5091-1: Linux kernel vulnerabilities

Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information. CVE-2021-33624 It was...

Microsoft Windows cmd.exe - Stack Buffer Overflow Vulnerability

Title: Microsoft Windows cmd.exe - Stack Buffer Overflow Author: John Page aka hyp3rlinx Source: http://hyp3rlinx.altervista.org/advisories/MICROSOFT-WINDOWS-CMD.EXE-STACK-BUFFER-OVERFLOW.txt ISR: ApparitionSec Vendor www.microsoft.com Product cmd.exe is the default command-line interpreter for t...

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...

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...

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...

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...

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. ...