high
7.5
CWE
476
Advisory Published
CVE Published
Updated

CVE-2023-6536: Kernel: null pointer dereference in __nvmet_req_complete

First published: Mon Dec 11 2023(Updated: )

A flaw was found in the Linux kernel's NVMe driver. This issue may allow an unauthenticated malicious actor to send a set of crafted TCP packages when using NVMe over TCP, leading the NVMe driver to a NULL pointer dereference in the NVMe driver, causing kernel panic and a denial of service.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
Linux Kernel>=5.0<5.4.268
Linux Kernel>=5.5<5.10.209
Linux Kernel>=5.11<5.15.148
Linux Kernel>=5.16<6.1.75
Linux Kernel>=6.2<6.6.14
Linux Kernel>=6.7<6.7.2
Red Hat CodeReady Linux Builder=8.6
Red Hat CodeReady Linux Builder=9.2
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support=8.6_ppc64le
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support=9.2_ppc64le
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support=8.6_aarch64
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support=9.2_aarch64
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support=9.2_s390x
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=9.0
Red Hat Enterprise Linux Server EUS=8.6
Red Hat Enterprise Linux Server EUS=9.2
Red Hat Enterprise Linux for ARM64 EUS=8.6_aarch64
Red Hat Enterprise Linux for ARM64 EUS=9.2_aarch64
Red Hat Enterprise Linux for IBM Z Systems (s390x)=8.6_s390x
Red Hat Enterprise Linux for IBM Z Systems (s390x)=9.2_s390x
Red Hat Enterprise Linux for Power, little endian - Extended Update Support=8.6_ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support=9.2_ppc64le
Red Hat Enterprise Linux for Real Time=9.2
Red Hat Enterprise Linux for Real Time for NFV=9.2
Red Hat Enterprise Linux Server=8.6
Red Hat Enterprise Linux Server=9.2
Red Hat Enterprise Linux for SAP Applications for Power, little endian - Extended Update Support=8.6_ppc64le
Red Hat Enterprise Linux for SAP Applications for Power, little endian - Extended Update Support=9.2_ppc64le
Red Hat Enterprise Linux Server=8.6
All of
Red Hat Enterprise Linux=8.0
Red Hat Virtualization Host EUS=4.0
Debian Linux=10.0
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.20-1
6.12.21-1

Remedy

https://git.kernel.org/linus/872d26a391da92ed8f0c0f5cb5fef428067b7f30

Remedy

https://git.kernel.org/linus/efa56305908ba20de2104f1b8508c6a7401833be

Remedy

https://git.kernel.org/linus/0849a5441358cef02586fb2d60f707c0db195628

Remedy

https://git.kernel.org/linus/9a1abc24850eb759e36a2f8869161c3b7254c904

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2023-6536?

    CVE-2023-6536 has been classified as a high severity vulnerability due to its potential to cause kernel panic and denial of service.

  • Which software is affected by CVE-2023-6536?

    CVE-2023-6536 affects various versions of the Linux kernel, IBM Security Verify Governance, and Red Hat enterprise Linux components among others.

  • How do I fix CVE-2023-6536?

    To mitigate CVE-2023-6536, upgrade to a patched version of the Linux kernel or affected software components as the updates become available.

  • What kind of attack does CVE-2023-6536 allow?

    CVE-2023-6536 allows an unauthenticated attacker to exploit the NVMe driver over TCP, potentially causing a system crash.

  • Is there a workaround for CVE-2023-6536 if I cannot apply a patch immediately?

    There are no universal workarounds; disabling NVMe over TCP may prevent exploitation until a patch can be applied.

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