Description (CNA)
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).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a1d75f258230b75d46aecdf28b2e732413028863 before 49934861514d36d0995be8e81bb3312a499d8d9a; affected a1d75f258230b75d46aecdf28b2e732413028863 before 33168db352c7b56ae18aa55c2cae1a1c5905d30e; affected a1d75f258230b75d46aecdf28b2e732413028863 before 4690e2171f651e2b415e3941ce17f2f7b813aff6; affected a1d75f258230b75d46aecdf28b2e732413028863 before 8c78303eafbf85a728dd84d1750e89240c677dd9; affected a1d75f258230b75d46aecdf28b2e732413028863 before 831433527773e665bdb635ab5783d0b95d1246f4; affected a1d75f258230b75d46aecdf28b2e732413028863 before ac42e0f0eb66af966015ee33fd355bc6f5d80cd6; affected a1d75f258230b75d46aecdf28b2e732413028863 before 18a067240817bee8a9360539af5d79a4bf5398a5; affected a1d75f258230b75d46aecdf28b2e732413028863 before 3c0da3d163eb32f1f91891efaade027fa9b245b9 |
| Linux / Linux | affected 2.6.36; unaffected 0 before 2.6.36; unaffected 4.19.321 through 4.19.*; unaffected 5.4.283 through 5.4.*; unaffected 5.10.225 through 5.10.*; unaffected 5.15.166 through 5.15.*; unaffected 6.1.107 through 6.1.*; unaffected 6.6.48 through 6.6.*; unaffected 6.10.7 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/49934861514d36d0995be8e81bb3312a499d8d9a
- https://git.kernel.org/stable/c/33168db352c7b56ae18aa55c2cae1a1c5905d30e
- https://git.kernel.org/stable/c/4690e2171f651e2b415e3941ce17f2f7b813aff6
- https://git.kernel.org/stable/c/8c78303eafbf85a728dd84d1750e89240c677dd9
- https://git.kernel.org/stable/c/831433527773e665bdb635ab5783d0b95d1246f4
- https://git.kernel.org/stable/c/ac42e0f0eb66af966015ee33fd355bc6f5d80cd6
- https://git.kernel.org/stable/c/18a067240817bee8a9360539af5d79a4bf5398a5
- https://git.kernel.org/stable/c/3c0da3d163eb32f1f91891efaade027fa9b245b9
- https://project-zero.issues.chromium.org/issues/42451729
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.