{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74534", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.913Z", "datePublished": "2026-08-15T12:27:47.831Z", "dateUpdated": "2026-08-15T12:27:47.831Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T12:27:47.831Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix refcounting of iso_conn\n\niso_conn_del() and iso_chan_del() have a race that results to double-put\nof iso_conn:\n\n [Task hdev->workqueue] [Task 2]\n iso_conn_del iso_chan_del\n iso_conn_hold_unless_zero iso_conn_lock\n iso_conn_lock conn->sk = NULL\n iso_conn_unlock\n sk = iso_sock_hold(conn) <---------\u00b4\n if (!sk) iso_conn_put iso_conn_put\n iso_conn_put /* UAF */\n\nThe extra put for !sk in iso_conn_del() is currently required since\nfailing iso_chan_add() may leave iso_conn not associated with any sk.\n\nFix by having iso_pi(sk)->conn own refcount when non-NULL, so\niso_conn_del does not need to put it. Adjust the iso_conn_add()\nrefcounting so that conn is put if it does not get associated with an\nsk."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/iso.c"], "versions": [{"version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b", "lessThan": "3b921533e8aa95b77aadcf31737595578e735f3c", "status": "affected", "versionType": "git"}, {"version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b", "lessThan": "8208b4939afb0a1977fffe902c3ca42fe0f3baaa", "status": "affected", "versionType": "git"}, {"version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b", "lessThan": "fdfde532ab1caa165fcd8985001157ac8b4db365", "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": ["net/bluetooth/iso.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "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": "6.18.44"}, {"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/3b921533e8aa95b77aadcf31737595578e735f3c"}, {"url": "https://git.kernel.org/stable/c/8208b4939afb0a1977fffe902c3ca42fe0f3baaa"}, {"url": "https://git.kernel.org/stable/c/fdfde532ab1caa165fcd8985001157ac8b4db365"}], "title": "Bluetooth: ISO: fix refcounting of iso_conn", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/iso.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3b921533e8aa95b77aadcf31737595578e735f3c", "status": "affected", "version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b", "versionType": "git"}, {"lessThan": "8208b4939afb0a1977fffe902c3ca42fe0f3baaa", "status": "affected", "version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b", "versionType": "git"}, {"lessThan": "fdfde532ab1caa165fcd8985001157ac8b4db365", "status": "affected", "version": "dc26097bdb864a0d5955b9a25e43376ffc1af99b", "versionType": "git"}, {"status": "affected", "version": "f53e7489273dc2bb307bf50f319b3762d45534f0", "versionType": "git"}, {"status": "affected", "version": "a58d0f5dac322e16cc75334d000666512341bde5", "versionType": "git"}, {"lessThan": "6.12", "status": "affected", "version": "6.11.11", "versionType": "semver"}, {"lessThan": "6.13", "status": "affected", "version": "6.12.2", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/iso.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"lessThan": "6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc6", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix refcounting of iso_conn\n\niso_conn_del() and iso_chan_del() have a race that results to double-put\nof iso_conn:\n\n [Task hdev->workqueue] [Task 2]\n iso_conn_del iso_chan_del\n iso_conn_hold_unless_zero iso_conn_lock\n iso_conn_lock conn->sk = NULL\n iso_conn_unlock\n sk = iso_sock_hold(conn) <---------\u00b4\n if (!sk) iso_conn_put iso_conn_put\n iso_conn_put /* UAF */\n\nThe extra put for !sk in iso_conn_del() is currently required since\nfailing iso_chan_add() may leave iso_conn not associated with any sk.\n\nFix by having iso_pi(sk)->conn own refcount when non-NULL, so\niso_conn_del does not need to put it. Adjust the iso_conn_add()\nrefcounting so that conn is put if it does not get associated with an\nsk."}], "id": "CVE-2026-74534", "lastModified": "2026-08-15T13:17:58.700", "metrics": {}, "published": "2026-08-15T13:17:58.700", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3b921533e8aa95b77aadcf31737595578e735f3c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8208b4939afb0a1977fffe902c3ca42fe0f3baaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fdfde532ab1caa165fcd8985001157ac8b4db365"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"created": "2026-08-15T16:00:07.793485+00:00", "updated": "2026-08-15T16:00:07.793499+00:00", "vendors": [], "weaknesses": ["CWE-784", "CWE-362"]}