CVE-2024-47668 Information

Description

In the Linux kernel the following vulnerability has been resolved:

lib/generic-radix-tree.c: Fix rare race in __genradix_ptr_alloc()

If we need to increase the tree depth allocate a new node and then race with another thread that increased the tree depth before us we’ll still have a preallocated node that might be used later.

If we then use that node for a new non-root node it’ll still have a pointer to the old root instead of being zeroed - fix this by zeroing it in the cmpxchg failure path.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://git.kernel.org/stable/c/0f27f4f445390cb7f73d4209cb2bf32834dc53da https://git.kernel.org/stable/c/99418ec776a39609f50934720419e0b464ca2283 https://git.kernel.org/stable/c/ad5ee9feebc2eb8cfc76ed74a2d6e55343b0e169 https://git.kernel.org/stable/c/ebeff038744c498a036e7a92eb8e433ae0a386d7 https://git.kernel.org/stable/c/d942e855324a60107025c116245095632476613e https://git.kernel.org/stable/c/0f078f8ca93b28a34e20bd050f12cd4efeee7c0f https://git.kernel.org/stable/c/b2f11c6f3e1fc60742673b8675c95b78447f3dae

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

4.7