Improper Initialization Affecting kernel-syms package, versions <6.4.0-150600.23.25.1
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Test your applications- Snyk ID SNYK-SLES156-KERNELSYMS-8174705
- published 10 Oct 2024
- disclosed 9 Oct 2024
Introduced: 9 Oct 2024
New CVE-2024-44947 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 kernel-syms to version 6.4.0-150600.23.25.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-syms package and not the kernel-syms package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
fuse: Initialize beyond-EOF page contents before setting uptodate
fuse_notify_store(), unlike fuse_do_readpage(), does not enable page zeroing (because it can be used to change partial page contents).
So fuse_notify_store() must be more careful to fully initialize page contents (including parts of the page that are beyond end-of-file) before marking the page uptodate.
The current code can leave beyond-EOF page contents uninitialized, which makes these uninitialized page contents visible to userspace via mmap().
This is an information leak, but only affects systems which do not enable init-on-alloc (via CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y or the corresponding kernel command line parameter).
References
- https://www.suse.com/security/cve/CVE-2024-44947.html
- https://bugzilla.suse.com/1229456
- https://bugzilla.suse.com/1230098
- https://git.kernel.org/stable/c/18a067240817bee8a9360539af5d79a4bf5398a5
- https://git.kernel.org/stable/c/33168db352c7b56ae18aa55c2cae1a1c5905d30e
- https://git.kernel.org/stable/c/3c0da3d163eb32f1f91891efaade027fa9b245b9
- https://git.kernel.org/stable/c/4690e2171f651e2b415e3941ce17f2f7b813aff6
- https://git.kernel.org/stable/c/49934861514d36d0995be8e81bb3312a499d8d9a
- https://git.kernel.org/stable/c/831433527773e665bdb635ab5783d0b95d1246f4
- https://git.kernel.org/stable/c/8c78303eafbf85a728dd84d1750e89240c677dd9
- https://git.kernel.org/stable/c/ac42e0f0eb66af966015ee33fd355bc6f5d80cd6