{"id":"CVE-2026-43041","title":"net: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix memory leak","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix memory leak\n\n__radix_tree_create() allocates and links intermediate nodes into the\ntree one by one. If a s…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < f2dd9aaf6e2861337f5835f877a5b2becaf4b015","Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 4b75ff0aedd6ade1018ad4a3a9d8336794e36e42","Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < ff134cc43972d7ddceff8cfd36cf6b9eaafc00b3","Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 0fda873092b541bb5a9b87d728a2429f863f8cfa","Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 69402908e277dd164bf8d7c8fd0513c0fac28e9e","Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < f2664bc4f0f356f17c2094587a2b3665e3867e44","Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 5d2249eefaca59908fe3c264b8eca526424dcfbe","Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 2428083101f6883f979cceffa76cd8440751ffe6","Linux 5.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:26:58.829037Z"},"published":"2026-05-01","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:27.915Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43041","references":[{"url":"https://git.kernel.org/stable/c/f2dd9aaf6e2861337f5835f877a5b2becaf4b015"},{"url":"https://git.kernel.org/stable/c/4b75ff0aedd6ade1018ad4a3a9d8336794e36e42"},{"url":"https://git.kernel.org/stable/c/ff134cc43972d7ddceff8cfd36cf6b9eaafc00b3"},{"url":"https://git.kernel.org/stable/c/0fda873092b541bb5a9b87d728a2429f863f8cfa"},{"url":"https://git.kernel.org/stable/c/69402908e277dd164bf8d7c8fd0513c0fac28e9e"},{"url":"https://git.kernel.org/stable/c/f2664bc4f0f356f17c2094587a2b3665e3867e44"},{"url":"https://git.kernel.org/stable/c/5d2249eefaca59908fe3c264b8eca526424dcfbe"},{"url":"https://git.kernel.org/stable/c/2428083101f6883f979cceffa76cd8440751ffe6"}],"tags":["cve.org"],"epss":0.00114,"epssPercentile":0.01499,"ingestedAt":"2026-11-06T15:54:04.031Z","slug":"CVE-2026-43041","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix memory leak\n\n__radix_tree_create() allocates and links intermediate nodes into the\ntree one by one. If a subsequent allocation fails, the already-linked\nnodes remain in the tree with no corresponding leaf entry. These orphaned\ninternal nodes are never reclaimed because radix_tree_for_each_slot()\nonly visits slots containing leaf values.\n\nThe radix_tree API is deprecated in favor of xarray. As suggested by\nMatthew Wilcox, migrate qrtr_tx_flow from radix_tree to xarray instead\nof fixing the radix_tree itself [1]. xarray properly handles cleanup of\ninternal nodes — xa_destroy() frees all internal xarray nodes when the\nqrtr_node is released, preventing the leak.\n\n[1] https://lore.kernel.org/all/20260225071623.41275-1-jiayuan.chen@linux.dev/T/\n\n## Affected\n\n- `Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < f2dd9aaf6e2861337f5835f877a5b2becaf4b015`\n- `Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 4b75ff0aedd6ade1018ad4a3a9d8336794e36e42`\n- `Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < ff134cc43972d7ddceff8cfd36cf6b9eaafc00b3`\n- `Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 0fda873092b541bb5a9b87d728a2429f863f8cfa`\n- `Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 69402908e277dd164bf8d7c8fd0513c0fac28e9e`\n- `Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < f2664bc4f0f356f17c2094587a2b3665e3867e44`\n- `Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 5d2249eefaca59908fe3c264b8eca526424dcfbe`\n- `Linux >= 5fdeb0d372ab33b4175043a2a4a1730239a217f1 < 2428083101f6883f979cceffa76cd8440751ffe6`\n- `Linux 5.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}