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CVE-2024-56654 (GCVE-0-2024-56654)

Vulnerability from cvelistv5 – Published: 2024-12-27 15:06 – Updated: 2026-08-05 11:45
VLAI
Title
Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating The usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is not safe since for the most part entries fetched this way shall be treated as rcu_dereference: Note that the value returned by rcu_dereference() is valid only within the enclosing RCU read-side critical section [1]_. For example, the following is **not** legal:: rcu_read_lock(); p = rcu_dereference(head.next); rcu_read_unlock(); x = p->address; /* BUG!!! */ rcu_read_lock(); y = p->data; /* BUG!!! */ rcu_read_unlock();
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 20:00 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a0bfde167b506423111ddb8cd71930497a40fc54 , < 0108132d7d76d884e443d18b4f067cdf2811911b (git)
Affected: a0bfde167b506423111ddb8cd71930497a40fc54 , < f9ecc90b5d501b3a5a62d0685d5104f934bb0104 (git)
Affected: a0bfde167b506423111ddb8cd71930497a40fc54 , < 581dd2dc168fe0ed2a7a5534a724f0d3751c93ae (git)
Affected: b475c1109251e30ec21fb574d72a1c71a4ab0039 (git)
Affected: 2ccde10127447c1a5caad8469fede945bdb62fdf (git)
Affected: 6.4.16 , < 6.5 (semver)
Affected: 6.5.3 , < 6.6 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.67 , ≤ 6.6.* (semver)
Unaffected: 6.12.6 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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              "value": "AV:L - The vulnerable event handler runs in response to an HCI_LE_Create_BIG command that the local host issues only when a local process creates broadcast ISO sockets via the AF_BLUETOOTH/BTPROTO_ISO syscall interface. BIG creation involves no remote peer, so the attacker must have local system access.\nAC:L - The attacker fully controls both the number of bound BIS connections and the QoS parameters that determine whether the controller returns a failing Create BIG status, and the freed pointer is dereferenced deterministically by the loop\u0027s increment step on every failed BIG creation. Heap grooming to control the reallocated hci_conn contents is done from the attacker\u0027s own threads.\nPR:L - iso_sock_create(), iso_sock_bind(), and iso_sock_connect() perform no capable() checks, so any unprivileged local user \u2014 or a sandboxed Android app with Bluetooth access \u2014 can bind and connect the ISO sockets that drive the vulnerable path. No CAP_NET_ADMIN or root is needed to reach the bug.\nUI:N - The entire sequence is driven by the attacker\u0027s own socket, setsockopt, bind, and connect calls. No victim action or interaction is required.\nS:U - The use-after-free corrupts kernel heap memory and is exploited within the kernel\u0027s own security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The stale RCU pointer is read from a freed, attacker-sprayable hci_conn slab object, and the resulting pointer is dereferenced at multiple offsets (dst, type, iso_qos), yielding an arbitrary kernel-memory read primitive. The unbounded ev-\u003ebis_handle[i++] indexing adds an additional out-of-bounds read.\nI:H - After the free the loop writes through the attacker-controlled pointer (conn-\u003estate assignment and set_bit on conn-\u003eflags) and calls hci_conn_del(), which invokes conn-\u003ecleanup(conn) \u2014 an indirect call through an attacker-supplied function pointer, giving arbitrary write and control-flow hijack.\nA:H - Iterating from a kfree\u0027d list node reliably produces a wild-pointer dereference, KASAN splat, or kernel panic even without successful heap grooming. The crash is triggerable on demand by any local user."
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      "id": "CVE-2024-56654",
      "lastModified": "2025-01-06T22:33:09.937",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-12-27T15:15:25.237",
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    },
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      "cve": "CVE-2024-56654",
      "id": "msrc_CVE-2024-56654",
      "initial_release_date": "2024-12-02T00:00:00.000Z",
      "product_status:fixed": "2",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2024-56654.json",
      "version": "1"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-56654\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-12-27T15:15:25.237\",\"lastModified\":\"2026-08-04T11:22:18.380\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: hci_event: Fix using rcu_read_(un)lock while iterating\\n\\nThe usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is\\nnot safe since for the most part entries fetched this way shall be\\ntreated as rcu_dereference:\\n\\n\\tNote that the value returned by rcu_dereference() is valid\\n\\tonly within the enclosing RCU read-side critical section [1]_.\\n\\tFor example, the following is **not** legal::\\n\\n\\t\\trcu_read_lock();\\n\\t\\tp = rcu_dereference(head.next);\\n\\t\\trcu_read_unlock();\\n\\t\\tx = p-\u003eaddress;\\t/* BUG!!! */\\n\\t\\trcu_read_lock();\\n\\t\\ty = p-\u003edata;\\t/* BUG!!! */\\n\\t\\trcu_read_unlock();\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: hci_event: Se solucion\u00f3 el uso de rcu_read_(un)lock durante la iteraci\u00f3n El uso de rcu_read_(un)lock mientras se est\u00e1 dentro de list_for_each_entry_rcu no es seguro ya que en la mayor parte de los casos las entradas obtenidas de esta manera se tratar\u00e1n como rcu_dereference: Tenga en cuenta que el valor devuelto por rcu_dereference() solo es v\u00e1lido dentro de la secci\u00f3n cr\u00edtica del lado de lectura de RCU [1]_. Por ejemplo, lo siguiente **no** es legal:: rcu_read_lock(); p = rcu_dereference(head.next); rcu_read_unlock(); x = p-\u0026gt;address; /* \u00a1ERROR! */ rcu_read_lock(); y = p-\u0026gt;data; /* \u00a1ERROR! */ rcu_read_unlock();\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/bluetooth/hci_event.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a0bfde167b506423111ddb8cd71930497a40fc54\",\"lessThan\":\"0108132d7d76d884e443d18b4f067cdf2811911b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a0bfde167b506423111ddb8cd71930497a40fc54\",\"lessThan\":\"f9ecc90b5d501b3a5a62d0685d5104f934bb0104\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a0bfde167b506423111ddb8cd71930497a40fc54\",\"lessThan\":\"581dd2dc168fe0ed2a7a5534a724f0d3751c93ae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b475c1109251e30ec21fb574d72a1c71a4ab0039\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2ccde10127447c1a5caad8469fede945bdb62fdf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.4.16\",\"lessThan\":\"6.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.5.3\",\"lessThan\":\"6.6\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/bluetooth/hci_event.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.67\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.6\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.13\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-10-01T20:00:19.506429Z\",\"id\":\"CVE-2024-56654\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4.16\",\"versionEndExcluding\":\"6.5\",\"matchCriteriaId\":\"A5099559-2D15-42A5-A561-71B34FEFF36F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5.3\",\"versionEndExcluding\":\"6.6.67\",\"matchCriteriaId\":\"F1CE7364-7396-4F17-8A39-45AB0F1A689E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.6\",\"matchCriteriaId\":\"0CB1A9BB-F95E-43DD-A2FD-147912FD91E5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"62567B3C-6CEE-46D0-BC2E-B3717FBF7D13\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5A073481-106D-4B15-B4C7-FB0213B8E1D4\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0108132d7d76d884e443d18b4f067cdf2811911b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/581dd2dc168fe0ed2a7a5534a724f0d3751c93ae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f9ecc90b5d501b3a5a62d0685d5104f934bb0104\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T08:16:54+00:00",
      "cve": "CVE-2024-56654",
      "id": "CVE-2024-56654",
      "initial_release_date": "2024-12-27T00:00:00+00:00",
      "product_status:fixed": "305",
      "product_status:known_affected": "64",
      "product_status:known_not_affected": "48",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-56654.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-12T23:53:26Z",
      "cve": "CVE-2024-56654",
      "id": "CVE-2024-56654",
      "initial_release_date": "2025-01-11T00:21:41Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "469",
      "product_status:recommended": "401",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-56654",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-56654.json",
      "version": "62"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"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-2024-56654\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T20:00:19.506429Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T15:44:45.119Z\"}}], \"cna\": {\"title\": \"Bluetooth: hci_event: Fix using rcu_read_(un)lock while iterating\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - The vulnerable event handler runs in response to an HCI_LE_Create_BIG command that the local host issues only when a local process creates broadcast ISO sockets via the AF_BLUETOOTH/BTPROTO_ISO syscall interface. BIG creation involves no remote peer, so the attacker must have local system access.\\nAC:L - The attacker fully controls both the number of bound BIS connections and the QoS parameters that determine whether the controller returns a failing Create BIG status, and the freed pointer is dereferenced deterministically by the loop\u0027s increment step on every failed BIG creation. Heap grooming to control the reallocated hci_conn contents is done from the attacker\u0027s own threads.\\nPR:L - iso_sock_create(), iso_sock_bind(), and iso_sock_connect() perform no capable() checks, so any unprivileged local user \\u2014 or a sandboxed Android app with Bluetooth access \\u2014 can bind and connect the ISO sockets that drive the vulnerable path. No CAP_NET_ADMIN or root is needed to reach the bug.\\nUI:N - The entire sequence is driven by the attacker\u0027s own socket, setsockopt, bind, and connect calls. No victim action or interaction is required.\\nS:U - The use-after-free corrupts kernel heap memory and is exploited within the kernel\u0027s own security authority. No VM, IOMMU, or sandbox boundary is crossed.\\nC:H - The stale RCU pointer is read from a freed, attacker-sprayable hci_conn slab object, and the resulting pointer is dereferenced at multiple offsets (dst, type, iso_qos), yielding an arbitrary kernel-memory read primitive. The unbounded ev-\u003ebis_handle[i++] indexing adds an additional out-of-bounds read.\\nI:H - After the free the loop writes through the attacker-controlled pointer (conn-\u003estate assignment and set_bit on conn-\u003eflags) and calls hci_conn_del(), which invokes conn-\u003ecleanup(conn) \\u2014 an indirect call through an attacker-supplied function pointer, giving arbitrary write and control-flow hijack.\\nA:H - Iterating from a kfree\u0027d list node reliably produces a wild-pointer dereference, KASAN splat, or kernel panic even without successful heap grooming. The crash is triggerable on demand by any local user.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a0bfde167b506423111ddb8cd71930497a40fc54\", \"lessThan\": \"0108132d7d76d884e443d18b4f067cdf2811911b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a0bfde167b506423111ddb8cd71930497a40fc54\", \"lessThan\": \"f9ecc90b5d501b3a5a62d0685d5104f934bb0104\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a0bfde167b506423111ddb8cd71930497a40fc54\", \"lessThan\": \"581dd2dc168fe0ed2a7a5534a724f0d3751c93ae\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b475c1109251e30ec21fb574d72a1c71a4ab0039\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2ccde10127447c1a5caad8469fede945bdb62fdf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6.4.16\", \"lessThan\": \"6.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.5.3\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}], \"programFiles\": [\"net/bluetooth/hci_event.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.67\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/bluetooth/hci_event.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0108132d7d76d884e443d18b4f067cdf2811911b\"}, {\"url\": \"https://git.kernel.org/stable/c/f9ecc90b5d501b3a5a62d0685d5104f934bb0104\"}, {\"url\": \"https://git.kernel.org/stable/c/581dd2dc168fe0ed2a7a5534a724f0d3751c93ae\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: hci_event: Fix using rcu_read_(un)lock while iterating\\n\\nThe usage of rcu_read_(un)lock while inside list_for_each_entry_rcu is\\nnot safe since for the most part entries fetched this way shall be\\ntreated as rcu_dereference:\\n\\n\\tNote that the value returned by rcu_dereference() is valid\\n\\tonly within the enclosing RCU read-side critical section [1]_.\\n\\tFor example, the following is **not** legal::\\n\\n\\t\\trcu_read_lock();\\n\\t\\tp = rcu_dereference(head.next);\\n\\t\\trcu_read_unlock();\\n\\t\\tx = p-\u003eaddress;\\t/* BUG!!! */\\n\\t\\trcu_read_lock();\\n\\t\\ty = p-\u003edata;\\t/* BUG!!! */\\n\\t\\trcu_read_unlock();\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.67\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.6\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"6.4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"6.5.3\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:45:52.018Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-56654\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:45:52.018Z\", \"dateReserved\": \"2024-12-27T15:00:39.841Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-12-27T15:06:18.224Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.