CVE-2026-43041
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix memory leak
__radix_tree_create() allocates and links intermediate nodes into the
tree one by one. If a subsequent allocation fails, the already-linked
nodes remain in the tree with no corresponding leaf entry. These orphaned
internal nodes are never reclaimed because radix_tree_for_each_slot()
only visits slots containing leaf values.
The radix_tree API is deprecated in favor of xarray. As suggested by
Matthew Wilcox, migrate qrtr_tx_flow from radix_tree to xarray instead
of fixing the radix_tree itself [1]. xarray properly handles cleanup of
internal nodes — xa_destroy() frees all internal xarray nodes when the
qrtr_node is released, preventing the leak.
[1] https://lore.kernel.org/all/20260225071623.41275-1-jiayuan.chen@linux.dev/T/
net: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix memory leak
__radix_tree_create() allocates and links intermediate nodes into the
tree one by one. If a subsequent allocation fails, the already-linked
nodes remain in the tree with no corresponding leaf entry. These orphaned
internal nodes are never reclaimed because radix_tree_for_each_slot()
only visits slots containing leaf values.
The radix_tree API is deprecated in favor of xarray. As suggested by
Matthew Wilcox, migrate qrtr_tx_flow from radix_tree to xarray instead
of fixing the radix_tree itself [1]. xarray properly handles cleanup of
internal nodes — xa_destroy() frees all internal xarray nodes when the
qrtr_node is released, preventing the leak.
[1] https://lore.kernel.org/all/20260225071623.41275-1-jiayuan.chen@linux.dev/T/
Vulnerability Details
Published Date
Last Modified
Source
NVD
Vendor
Linux
Product
Linux
External References
- https://git.kernel.org/stable/c/0fda873092b541bb5a9b87d728a2429f863f8cfa
- https://git.kernel.org/stable/c/2428083101f6883f979cceffa76cd8440751ffe6
- https://git.kernel.org/stable/c/4b75ff0aedd6ade1018ad4a3a9d8336794e36e42
- https://git.kernel.org/stable/c/5d2249eefaca59908fe3c264b8eca526424dcfbe
- https://git.kernel.org/stable/c/69402908e277dd164bf8d7c8fd0513c0fac28e9e
- https://git.kernel.org/stable/c/f2664bc4f0f356f17c2094587a2b3665e3867e44
- https://git.kernel.org/stable/c/f2dd9aaf6e2861337f5835f877a5b2becaf4b015
- https://git.kernel.org/stable/c/ff134cc43972d7ddceff8cfd36cf6b9eaafc00b3
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