{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50078", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.941Z", "datePublished": "2024-10-29T00:50:20.446Z", "dateUpdated": "2026-08-05T11:41:27.898Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:41:27.898Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: Call iso_exit() on module unload\n\nIf iso_init() has been called, iso_exit() must be called on module\nunload. Without that, the struct proto that iso_init() registered with\nproto_register() becomes invalid, which could cause unpredictable\nproblems later. In my case, with CONFIG_LIST_HARDENED and\nCONFIG_BUG_ON_DATA_CORRUPTION enabled, loading the module again usually\ntriggers this BUG():\n\n list_add corruption. next->prev should be prev (ffffffffb5355fd0),\n but was 0000000000000068. (next=ffffffffc0a010d0).\n ------------[ cut here ]------------\n kernel BUG at lib/list_debug.c:29!\n Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI\n CPU: 1 PID: 4159 Comm: modprobe Not tainted 6.10.11-4+bt2-ao-desktop #1\n RIP: 0010:__list_add_valid_or_report+0x61/0xa0\n ...\n __list_add_valid_or_report+0x61/0xa0\n proto_register+0x299/0x320\n hci_sock_init+0x16/0xc0 [bluetooth]\n bt_init+0x68/0xd0 [bluetooth]\n __pfx_bt_init+0x10/0x10 [bluetooth]\n do_one_initcall+0x80/0x2f0\n do_init_module+0x8b/0x230\n __do_sys_init_module+0x15f/0x190\n do_syscall_64+0x68/0x110\n ..." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - Nothing in this bug involves over-the-air Bluetooth traffic; the dangling pointers are reached purely locally via `open(\"/proc/net/iso\")`, `read(\"/proc/net/protocols\")`, or a `socket(AF_BLUETOOTH, …)` syscall that autoloads the module. Local access to the system is therefore required.\nAC:L - Once the module has been unloaded the stale `proto_list` entry and stale `/proc/net/iso` seq_operations are deterministic — no race, no memory-layout guessing, and the attacker himself triggers the corrupting `proto_register()` by autoloading the module on demand. Every trigger is a single reliable syscall.\nPR:L - The corrupting dereferences are all performed on behalf of an ordinary unprivileged local user: `/proc/net/iso` and `/proc/net/protocols` are world-readable (mode forced to S_IRUGO by proc_create_reg), and `request_module(\"net-pf-31\")` in `__sock_create()` has no capability gate. No CAP_NET_ADMIN or CAP_SYS_MODULE is needed by the attacker to hit the freed memory.\nUI:N - The vulnerable condition is a persistent system state left behind by an ordinary lifecycle event (driver reload, dongle hotplug handling, rfkill/hardening scripts, `modprobe -r bluetooth` during troubleshooting), not an action a victim must be tricked into performing as part of the attack. After that state exists, the attacker acts entirely alone.\nS:U - The corruption is confined to kernel memory within the same security authority; there is no VM, IOMMU, or sandbox boundary crossed. Standard kernel-local privilege-escalation scope.\nC:H - `proto_seq_printf()` walks the stale `proto_list` entry and prints `proto->name` (`%s`) and `proto->owner->name` from freed module memory straight to userspace, and the stale `bt_seq_ops`/`iso_sk_list` in `/proc/net/iso` yield an attacker-steerable read primitive over reallocated kernel memory.\nI:H - The next `proto_register()` performs `__list_add`, writing a kernel pointer into the freed module region, and `/proc/net/iso` makes an indirect call through a `seq_operations` function pointer read from that same freed memory — a use-after-free giving both write and control-flow-hijack primitives once the module vmalloc range is reused.\nA:H - The reported symptom is a hard kernel panic — `list_add corruption … kernel BUG at lib/list_debug.c:29` / `Oops: invalid opcode` — reproducibly triggered on module reload, which any unprivileged user can force via AF_BLUETOOTH socket autoload. Uninstrumented kernels instead suffer arbitrary memory corruption that crashes just as readily." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/af_bluetooth.c" ], "versions": [ { "version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "4af7ba39a1a02e16ee8cd0d3b6c6657f51b8ad7a", "status": "affected", "versionType": "git" }, { "version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "05f84d86169b2ebac185c5736a256823d42c425b", "status": "affected", "versionType": "git" }, { "version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "f905a7d95091e0d2605a3a1a157a9351f09ab2e1", "status": "affected", "versionType": "git" }, { "version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "d458cd1221e9e56da3b2cc5518ad3225caa91f20", "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/af_bluetooth.c" ], "versions": [ { "version": "6.0", "status": "affected" }, { "version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.114", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.58", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.5", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "6.0", "versionEndExcluding": "6.1.114" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.11.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/4af7ba39a1a02e16ee8cd0d3b6c6657f51b8ad7a" }, { "url": "https://git.kernel.org/stable/c/05f84d86169b2ebac185c5736a256823d42c425b" }, { "url": "https://git.kernel.org/stable/c/f905a7d95091e0d2605a3a1a157a9351f09ab2e1" }, { "url": "https://git.kernel.org/stable/c/d458cd1221e9e56da3b2cc5518ad3225caa91f20" } ], "title": "Bluetooth: Call iso_exit() on module unload", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-50078", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:23:25.456239Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:20.959Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:25:12.840Z" } } ] } }