{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64178", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.039Z", "datePublished": "2026-07-19T15:41:02.293Z", "dateUpdated": "2026-08-05T12:39:55.555Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:39:55.555Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bnep: Fix UAF read of dev->name\n\nbnep_add_connection() needs to keep holding the bnep_session_sem while\nreading dev->name (just like bnep_get_connlist() does); otherwise the\nbnep_session() thread can concurrently free the net_device, which can for\nexample be triggered by a concurrent bnep_del_connection().\n\n(This UAF is fairly uninteresting from a security perspective;\ncalling bnep_add_connection() requires passing a capable(CAP_NET_ADMIN)\ncheck. It also requires completely tearing down a netdev during a fairly\ntight race window.)" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The bug is in BNEP session setup for Bluetooth PAN; the highest-impact scenario is an adjacent Bluetooth peer on a phone or laptop whose stack calls BNEPCONNADD during PAN bridging, not a generic local syscall path.\nAC:L - The attacker controls disconnect/reconnect timing on the established L2CAP socket and can repeatedly race teardown against bnep_add_connection()'s unprotected strcpy window; UAF races with attacker-controlled concurrency are AC:L.\nPR:N - Exploitation does not require attacker privileges on the victim—only adjacency as the connected Bluetooth peer while the victim's privileged bluetoothd issues BNEPCONNADD; CAP_NET_ADMIN gates the ioctl on the victim side, not the attacker.\nUI:N - Once Bluetooth PAN/tethering is available, the attacker initiates and tears down the connection to drive the race without requiring additional victim action during exploitation.\nS:U - Impact is kernel memory corruption and potential privilege escalation within the host kernel, not crossing into another security authority such as a VM guest or separate sandbox domain.\nC:H - This is a use-after-free read of freed net_device memory via strcpy(dev->name); UAF reads can expose reclaimed slab contents and support further kernel memory disclosure.\nI:H - UAF on a heap-allocated net_device can be leveraged with heap grooming for control-flow or data corruption beyond the immediate bounded name copy.\nA:H - Concurrent free of the net_device during the UAF read can cause kernel oops/panic and denial of service, consistent with UAF availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/bnep/core.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a75bbcb10cb21acc169b785e9804f57d97873a9c", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4907596f25b1720fa948371ac5f6c1f8da10a5bc", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "915a92182e2cda9cd7d2479020a44c6eda986f7c", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fe69f634b076ae3ca81c5a5b845d9bba527036f7", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b21805258d7e926adfd455fc820a447b90da3b82", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5506aec795135cdd4cbf4e845929155663b25055", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e7578529b97e5d4e439cf8f3e637c2303015338f", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "59e932ded949fa6f0340bf7c6d7818f962fa4fd2", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/bnep/core.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "2.6.12", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.142" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.92" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.34" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.0.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a75bbcb10cb21acc169b785e9804f57d97873a9c" }, { "url": "https://git.kernel.org/stable/c/4907596f25b1720fa948371ac5f6c1f8da10a5bc" }, { "url": "https://git.kernel.org/stable/c/915a92182e2cda9cd7d2479020a44c6eda986f7c" }, { "url": "https://git.kernel.org/stable/c/fe69f634b076ae3ca81c5a5b845d9bba527036f7" }, { "url": "https://git.kernel.org/stable/c/b21805258d7e926adfd455fc820a447b90da3b82" }, { "url": "https://git.kernel.org/stable/c/5506aec795135cdd4cbf4e845929155663b25055" }, { "url": "https://git.kernel.org/stable/c/e7578529b97e5d4e439cf8f3e637c2303015338f" }, { "url": "https://git.kernel.org/stable/c/59e932ded949fa6f0340bf7c6d7818f962fa4fd2" } ], "title": "Bluetooth: bnep: Fix UAF read of dev->name", "x_generator": { "engine": "bippy-1.2.0" } } } }