CVE-2023-52518 (GCVE-0-2023-52518)
Vulnerability from cvelistv5 – Published: 2024-03-02 21:54 – Updated: 2026-05-11 19:28
VLAI
EPSS
VEX
Title
Bluetooth: hci_codec: Fix leaking content of local_codecs
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_codec: Fix leaking content of local_codecs
The following memory leak can be observed when the controller supports
codecs which are stored in local_codecs list but the elements are never
freed:
unreferenced object 0xffff88800221d840 (size 32):
comm "kworker/u3:0", pid 36, jiffies 4294898739 (age 127.060s)
hex dump (first 32 bytes):
f8 d3 02 03 80 88 ff ff 80 d8 21 02 80 88 ff ff ..........!.....
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffffb324f557>] __kmalloc+0x47/0x120
[<ffffffffb39ef37d>] hci_codec_list_add.isra.0+0x2d/0x160
[<ffffffffb39ef643>] hci_read_codec_capabilities+0x183/0x270
[<ffffffffb39ef9ab>] hci_read_supported_codecs+0x1bb/0x2d0
[<ffffffffb39f162e>] hci_read_local_codecs_sync+0x3e/0x60
[<ffffffffb39ff1b3>] hci_dev_open_sync+0x943/0x11e0
[<ffffffffb396d55d>] hci_power_on+0x10d/0x3f0
[<ffffffffb30c99b4>] process_one_work+0x404/0x800
[<ffffffffb30ca134>] worker_thread+0x374/0x670
[<ffffffffb30d9108>] kthread+0x188/0x1c0
[<ffffffffb304db6b>] ret_from_fork+0x2b/0x50
[<ffffffffb300206a>] ret_from_fork_asm+0x1a/0x30
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-24 14:55 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8961987f3f5fa2f2618e72304d013c8dd5e604a6 , < 626535077ba9dc110787540d1fe24881094c15a1
(git)
Affected: 8961987f3f5fa2f2618e72304d013c8dd5e604a6 , < eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1 (git) Affected: 8961987f3f5fa2f2618e72304d013c8dd5e604a6 , < b938790e70540bf4f2e653dcd74b232494d06c8f (git) |
guessed | |
| Linux | Linux |
Affected:
5.16
Unaffected: 0 , < 5.16 (semver) Unaffected: 6.1.57 , ≤ 6.1.* (semver) Unaffected: 6.5.7 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix) |
guessed |
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\"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52518\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-07-24T14:55:30.640088Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770 Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-24T14:55:35.931Z\"}}], \"cna\": {\"title\": \"Bluetooth: hci_codec: Fix leaking content of local_codecs\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8961987f3f5fa2f2618e72304d013c8dd5e604a6\", \"lessThan\": \"626535077ba9dc110787540d1fe24881094c15a1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8961987f3f5fa2f2618e72304d013c8dd5e604a6\", \"lessThan\": \"eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8961987f3f5fa2f2618e72304d013c8dd5e604a6\", \"lessThan\": \"b938790e70540bf4f2e653dcd74b232494d06c8f\", \"versionType\": \"git\"}], \"programFiles\": [\"net/bluetooth/hci_core.c\", \"net/bluetooth/hci_event.c\", \"net/bluetooth/hci_sync.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.16\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.16\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.57\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/bluetooth/hci_core.c\", \"net/bluetooth/hci_event.c\", \"net/bluetooth/hci_sync.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/626535077ba9dc110787540d1fe24881094c15a1\"}, {\"url\": \"https://git.kernel.org/stable/c/eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1\"}, {\"url\": \"https://git.kernel.org/stable/c/b938790e70540bf4f2e653dcd74b232494d06c8f\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: hci_codec: Fix leaking content of local_codecs\\n\\nThe following memory leak can be observed when the controller supports\\ncodecs which are stored in local_codecs list but the elements are never\\nfreed:\\n\\nunreferenced object 0xffff88800221d840 (size 32):\\n comm \\\"kworker/u3:0\\\", pid 36, jiffies 4294898739 (age 127.060s)\\n hex dump (first 32 bytes):\\n f8 d3 02 03 80 88 ff ff 80 d8 21 02 80 88 ff ff ..........!.....\\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\\n backtrace:\\n [\u003cffffffffb324f557\u003e] __kmalloc+0x47/0x120\\n [\u003cffffffffb39ef37d\u003e] hci_codec_list_add.isra.0+0x2d/0x160\\n [\u003cffffffffb39ef643\u003e] hci_read_codec_capabilities+0x183/0x270\\n [\u003cffffffffb39ef9ab\u003e] hci_read_supported_codecs+0x1bb/0x2d0\\n [\u003cffffffffb39f162e\u003e] hci_read_local_codecs_sync+0x3e/0x60\\n [\u003cffffffffb39ff1b3\u003e] hci_dev_open_sync+0x943/0x11e0\\n [\u003cffffffffb396d55d\u003e] hci_power_on+0x10d/0x3f0\\n [\u003cffffffffb30c99b4\u003e] process_one_work+0x404/0x800\\n [\u003cffffffffb30ca134\u003e] worker_thread+0x374/0x670\\n [\u003cffffffffb30d9108\u003e] kthread+0x188/0x1c0\\n [\u003cffffffffb304db6b\u003e] ret_from_fork+0x2b/0x50\\n [\u003cffffffffb300206a\u003e] ret_from_fork_asm+0x1a/0x30\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.57\", \"versionStartIncluding\": \"5.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.7\", \"versionStartIncluding\": \"5.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6\", \"versionStartIncluding\": \"5.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:38:26.511Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-52518\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:38:26.511Z\", \"dateReserved\": \"2024-02-20T12:30:33.317Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-02T21:54:47.826Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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