high
7.8
CWE
787 1314
EPSS
0.042%
Advisory Published
CVE Published
Updated

CVE-2024-0646: High Fixes for in Linux Kernel

First published: Sun Dec 10 2023(Updated: )

A flaw in the Linux Kernel found. When splice() is called with a ktls socket as destination, the ktls code fails to update the internal "curr"/"copybreak" accounting that tracks which parts of the plaintext scatter-gather buffer (`struct sk_msg_sg`) are unused writable memory. This can cause subsequent writes to the socket to overwrite the contents of spliced pages, including pages from files to which the caller is not supposed to have write access. Reference: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5a595000e267">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5a595000e267</a>

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

Affected SoftwareAffected VersionHow to fix
redhat/kernel<6.7
6.7
IBM Security Verify Governance, Identity Manager software component<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager virtual appliance component<=ISVG 10.0.2
Linux Kernel>=4.20<5.4.267
Linux Kernel>=5.5<5.10.208
Linux Kernel>=5.11<5.15.147
Linux Kernel>=5.16<6.1.69
Linux Kernel>=6.2<6.6.7
Linux Kernel=6.7-rc1
Linux Kernel=6.7-rc2
Linux Kernel=6.7-rc3
Linux Kernel=6.7-rc4
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=9.0
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.15-1

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=2253908

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c5a595000e267

Remedy

https://git.kernel.org/linus/d829e9c4112b52f4f00195900fd4c685f61365ab

Remedy

https://git.kernel.org/linus/c5a595000e2677e865a39f249c056bc05d6e55fd

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2024-0646?

    CVE-2024-0646 is classified as a significant vulnerability in the Linux Kernel affecting ktls sockets.

  • What systems are affected by CVE-2024-0646?

    CVE-2024-0646 affects various versions of the Linux Kernel, Red Hat Enterprise Linux, and specific IBM products.

  • How do I fix CVE-2024-0646?

    To fix CVE-2024-0646, update your Linux Kernel to versions 6.7 or apply patches to vulnerable systems.

  • What is the impact of CVE-2024-0646?

    CVE-2024-0646 may lead to improper access control on ktls sockets, potentially allowing unauthorized access to memory.

  • When was CVE-2024-0646 discovered?

    CVE-2024-0646 was publicly disclosed in 2024.

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