high
7.8
CWE
416 415
Advisory Published
Updated

CVE-2023-5345: Use-after-free in Linux kernel's fs/smb/client component

First published: Tue Oct 03 2023(Updated: )

A use-after-free vulnerability in the Linux kernel's fs/smb/client component can be exploited to achieve local privilege escalation. In case of an error in smb3_fs_context_parse_param, ctx->password was freed but the field was not set to NULL which could lead to double free. We recommend upgrading past commit e6e43b8aa7cd3c3af686caf0c2e11819a886d705.

Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<6.6
Linux Linux kernel=6.6-rc1
Linux Linux kernel=6.6-rc2
Linux Linux kernel=6.6-rc3
IBM Security Guardium<=12.0
redhat/kernel<6.6
6.6
Linux Linux kernel>=6.0.16<6.1.56
Linux Linux kernel>=6.2<6.5.6
Fedoraproject Fedora=37
Fedoraproject Fedora=38
Fedoraproject Fedora=39
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.12.6-1

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e6e43b8aa7cd3c3af686caf0c2e11819a886d705

Remedy

https://kernel.dance/e6e43b8aa7cd3c3af686caf0c2e11819a886d705

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2023-5345?

    The severity of CVE-2023-5345 is high, with a CVSS score of 7.8.

  • How can the use-after-free vulnerability in the Linux kernel's fs/smb/client component be exploited?

    The use-after-free vulnerability can be exploited to achieve local privilege escalation.

  • What is the impact of CVE-2023-5345?

    CVE-2023-5345 can lead to local privilege escalation.

  • Which versions of the Linux kernel are affected by CVE-2023-5345?

    Linux kernel versions 6.6, 6.6-rc1, 6.6-rc2, and 6.6-rc3 are affected by CVE-2023-5345.

  • How can I fix CVE-2023-5345?

    We recommend upgrading to a patched version of the Linux kernel to fix CVE-2023-5345.

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