{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74533", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.912Z", "datePublished": "2026-08-15T12:27:47.219Z", "dateUpdated": "2026-08-15T12:27:47.219Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T12:27:47.219Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix race of kfree vs kref_get_unless_zero\n\nhci_conn::iso_data is accessed and modified without lock or RCU.\nThis leads to a race\n\n [Task hdev->workqueue] \t[Task 2]\n iso_recv iso_conn_put(conn)\n conn = LOAD hcon->iso_data iso_conn_free(conn)\n iso_conn_hold_unless_zero(conn) hcon->iso_data = NULL\n kfree(conn)\n kref_get_unless_zero(&conn->ref) /* UAF */\n\nand also to races in iso_conn_add() vs. iso_conn_free().\n\nFix by adding spinlock hci_conn::proto_lock and using it to guard\nhci_conn::iso_data."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/bluetooth/hci_core.h", "net/bluetooth/hci_conn.c", "net/bluetooth/iso.c"], "versions": [{"version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b", "lessThan": "876a3e94c70d0859d1dad1c986112d4f0d99eba8", "status": "affected", "versionType": "git"}, {"version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b", "lessThan": "af24e338bf5dafb80f42baa9a0b9e9b57b1c5d9c", "status": "affected", "versionType": "git"}, {"version": "f53e7489273dc2bb307bf50f319b3762d45534f0", "status": "affected", "versionType": "git"}, {"version": "a58d0f5dac322e16cc75334d000666512341bde5", "status": "affected", "versionType": "git"}, {"version": "6.11.11", "lessThan": "6.12", "status": "affected", "versionType": "semver"}, {"version": "6.12.2", "lessThan": "6.13", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/bluetooth/hci_core.h", "net/bluetooth/hci_conn.c", "net/bluetooth/iso.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc6", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.2-rc6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/876a3e94c70d0859d1dad1c986112d4f0d99eba8"}, {"url": "https://git.kernel.org/stable/c/af24e338bf5dafb80f42baa9a0b9e9b57b1c5d9c"}], "title": "Bluetooth: ISO: fix race of kfree vs kref_get_unless_zero", "x_generator": {"engine": "bippy-1.2.0"}}}}

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