CVE-2026-43041

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/

PUBLISHED Reserved 2026-05-01 | Published 2026-05-01 | Updated 2026-05-01 | Assigner Linux

Product status

References

git.kernel.org/...c/f2dd9aaf6e2861337f5835f877a5b2becaf4b015

git.kernel.org/...c/4b75ff0aedd6ade1018ad4a3a9d8336794e36e42

git.kernel.org/...c/ff134cc43972d7ddceff8cfd36cf6b9eaafc00b3

git.kernel.org/...c/0fda873092b541bb5a9b87d728a2429f863f8cfa

git.kernel.org/...c/69402908e277dd164bf8d7c8fd0513c0fac28e9e

git.kernel.org/...c/f2664bc4f0f356f17c2094587a2b3665e3867e44

git.kernel.org/...c/5d2249eefaca59908fe3c264b8eca526424dcfbe

git.kernel.org/...c/2428083101f6883f979cceffa76cd8440751ffe6

cve.org (CVE-2026-43041)

nvd.nist.gov (CVE-2026-43041)

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