{"api_version":"1","generated_at":"2026-05-06T12:24:26+00:00","cve":"CVE-2026-43041","urls":{"html":"https://cve.report/CVE-2026-43041","api":"https://cve.report/api/cve/CVE-2026-43041.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43041","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43041"},"summary":{"title":"net: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix memory leak","description":"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 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/","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-01 15:16:50","updated_at":"2026-05-01 15:24:14"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f2dd9aaf6e2861337f5835f877a5b2becaf4b015","name":"https://git.kernel.org/stable/c/f2dd9aaf6e2861337f5835f877a5b2becaf4b015","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5d2249eefaca59908fe3c264b8eca526424dcfbe","name":"https://git.kernel.org/stable/c/5d2249eefaca59908fe3c264b8eca526424dcfbe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/69402908e277dd164bf8d7c8fd0513c0fac28e9e","name":"https://git.kernel.org/stable/c/69402908e277dd164bf8d7c8fd0513c0fac28e9e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f2664bc4f0f356f17c2094587a2b3665e3867e44","name":"https://git.kernel.org/stable/c/f2664bc4f0f356f17c2094587a2b3665e3867e44","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ff134cc43972d7ddceff8cfd36cf6b9eaafc00b3","name":"https://git.kernel.org/stable/c/ff134cc43972d7ddceff8cfd36cf6b9eaafc00b3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2428083101f6883f979cceffa76cd8440751ffe6","name":"https://git.kernel.org/stable/c/2428083101f6883f979cceffa76cd8440751ffe6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4b75ff0aedd6ade1018ad4a3a9d8336794e36e42","name":"https://git.kernel.org/stable/c/4b75ff0aedd6ade1018ad4a3a9d8336794e36e42","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0fda873092b541bb5a9b87d728a2429f863f8cfa","name":"https://git.kernel.org/stable/c/0fda873092b541bb5a9b87d728a2429f863f8cfa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43041","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43041","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5fdeb0d372ab33b4175043a2a4a1730239a217f1 f2dd9aaf6e2861337f5835f877a5b2becaf4b015 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5fdeb0d372ab33b4175043a2a4a1730239a217f1 4b75ff0aedd6ade1018ad4a3a9d8336794e36e42 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5fdeb0d372ab33b4175043a2a4a1730239a217f1 ff134cc43972d7ddceff8cfd36cf6b9eaafc00b3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5fdeb0d372ab33b4175043a2a4a1730239a217f1 0fda873092b541bb5a9b87d728a2429f863f8cfa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.168 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.134 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.81 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.22 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.12 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * 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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/"}],"providerMetadata":{"dateUpdated":"2026-05-01T14:15:38.112Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"net: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix memory leak","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43041","datePublished":"2026-05-01T14:15:38.112Z","dateReserved":"2026-05-01T14:12:55.978Z","dateUpdated":"2026-05-01T14:15:38.112Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-01 15:16:50","lastModifiedDate":"2026-05-01 15:24:14","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43041","Ordinal":"1","Title":"net: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix me","CVE":"CVE-2026-43041","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43041","Ordinal":"1","NoteData":"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 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/","Type":"Description","Title":"net: qrtr: replace qrtr_tx_flow radix_tree with xarray to fix me"}]}}}