CVE-2023-53445 (GCVE-0-2023-53445)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:04 – Updated: 2026-01-14 19:23
VLAI?
Title
net: qrtr: Fix a refcount bug in qrtr_recvmsg()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: Fix a refcount bug in qrtr_recvmsg() Syzbot reported a bug as following: refcount_t: addition on 0; use-after-free. ... RIP: 0010:refcount_warn_saturate+0x17c/0x1f0 lib/refcount.c:25 ... Call Trace: <TASK> __refcount_add include/linux/refcount.h:199 [inline] __refcount_inc include/linux/refcount.h:250 [inline] refcount_inc include/linux/refcount.h:267 [inline] kref_get include/linux/kref.h:45 [inline] qrtr_node_acquire net/qrtr/af_qrtr.c:202 [inline] qrtr_node_lookup net/qrtr/af_qrtr.c:398 [inline] qrtr_send_resume_tx net/qrtr/af_qrtr.c:1003 [inline] qrtr_recvmsg+0x85f/0x990 net/qrtr/af_qrtr.c:1070 sock_recvmsg_nosec net/socket.c:1017 [inline] sock_recvmsg+0xe2/0x160 net/socket.c:1038 qrtr_ns_worker+0x170/0x1700 net/qrtr/ns.c:688 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 It occurs in the concurrent scenario of qrtr_recvmsg() and qrtr_endpoint_unregister() as following: cpu0 cpu1 qrtr_recvmsg qrtr_endpoint_unregister qrtr_send_resume_tx qrtr_node_release qrtr_node_lookup mutex_lock(&qrtr_node_lock) spin_lock_irqsave(&qrtr_nodes_lock, ) refcount_dec_and_test(&node->ref) [node->ref == 0] radix_tree_lookup [node != NULL] __qrtr_node_release qrtr_node_acquire spin_lock_irqsave(&qrtr_nodes_lock, ) kref_get(&node->ref) [WARNING] ... mutex_unlock(&qrtr_node_lock) Use qrtr_node_lock to protect qrtr_node_lookup() implementation, this is actually improving the protection of node reference.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0a7e0d0ef05440db03c3199e84d228db943b237f , < 98a9cd82c541ef6cbdb829cd6c05cbbb471e373c (git)
Affected: 0a7e0d0ef05440db03c3199e84d228db943b237f , < b9ba5906c42089f8e1d0001b7b50a7940f086cbb (git)
Affected: 0a7e0d0ef05440db03c3199e84d228db943b237f , < aa95efa187b4114075f312b3c4680d050b56fdec (git)
Affected: 0a7e0d0ef05440db03c3199e84d228db943b237f , < 48a07f6e00d305597396da4d7494b81cec05b9d3 (git)
Affected: 0a7e0d0ef05440db03c3199e84d228db943b237f , < 44d807320000db0d0013372ad39b53e12d52f758 (git)
Create a notification for this product.
    Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.178 , ≤ 5.10.* (semver)
Unaffected: 5.15.107 , ≤ 5.15.* (semver)
Unaffected: 6.1.24 , ≤ 6.1.* (semver)
Unaffected: 6.2.11 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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qrtr_recvmsg+0x85f/0x990 net/qrtr/af_qrtr.c:1070\\n sock_recvmsg_nosec net/socket.c:1017 [inline]\\n sock_recvmsg+0xe2/0x160 net/socket.c:1038\\n qrtr_ns_worker+0x170/0x1700 net/qrtr/ns.c:688\\n process_one_work+0x991/0x15c0 kernel/workqueue.c:2390\\n worker_thread+0x669/0x1090 kernel/workqueue.c:2537\\n\\nIt occurs in the concurrent scenario of qrtr_recvmsg() and\\nqrtr_endpoint_unregister() as following:\\n\\n\\tcpu0\\t\\t\\t\\t\\tcpu1\\nqrtr_recvmsg\\t\\t\\t\\tqrtr_endpoint_unregister\\nqrtr_send_resume_tx\\t\\t\\tqrtr_node_release\\nqrtr_node_lookup\\t\\t\\tmutex_lock(\u0026qrtr_node_lock)\\nspin_lock_irqsave(\u0026qrtr_nodes_lock, )\\trefcount_dec_and_test(\u0026node-\u003eref) [node-\u003eref == 0]\\nradix_tree_lookup [node != NULL]\\t__qrtr_node_release\\nqrtr_node_acquire\\t\\t\\tspin_lock_irqsave(\u0026qrtr_nodes_lock, )\\nkref_get(\u0026node-\u003eref) [WARNING]\\t\\t...\\n\\t\\t\\t\\t\\tmutex_unlock(\u0026qrtr_node_lock)\\n\\nUse qrtr_node_lock to protect qrtr_node_lookup() implementation, this\\nis actually improving the protection of node reference.\"}],\"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},{\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-Other\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.6\",\"versionEndExcluding\":\"5.10.178\",\"matchCriteriaId\":\"D24F41C8-D72D-442C-8122-DD0C7229CC1F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.107\",\"matchCriteriaId\":\"6BCC0C73-754E-4985-A087-F74888650709\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.24\",\"matchCriteriaId\":\"E6EC432F-985F-450F-954E-7EAD42ADA1F8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.2.11\",\"matchCriteriaId\":\"93C03C9A-798F-4CD5-912F-A436BFA0CC7E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8E3B0E8-FA27-4305-87BB-AF6C25B160CB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"A47F0FC3-CE52-4BA1-BA51-22F783938431\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3583026A-27EC-4A4C-850A-83F2AF970673\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"DC271202-7570-4505-89A4-D602D47BFD00\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"D413BB6D-4F74-4C7D-9163-47786619EF53\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/44d807320000db0d0013372ad39b53e12d52f758\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/48a07f6e00d305597396da4d7494b81cec05b9d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/98a9cd82c541ef6cbdb829cd6c05cbbb471e373c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/aa95efa187b4114075f312b3c4680d050b56fdec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b9ba5906c42089f8e1d0001b7b50a7940f086cbb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "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-2023-53445\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T19:19:20.517800Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T19:19:14.522Z\"}}], \"cna\": {\"title\": \"net: qrtr: Fix a refcount bug in qrtr_recvmsg()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"0a7e0d0ef05440db03c3199e84d228db943b237f\", \"lessThan\": \"98a9cd82c541ef6cbdb829cd6c05cbbb471e373c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0a7e0d0ef05440db03c3199e84d228db943b237f\", \"lessThan\": \"b9ba5906c42089f8e1d0001b7b50a7940f086cbb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0a7e0d0ef05440db03c3199e84d228db943b237f\", \"lessThan\": \"aa95efa187b4114075f312b3c4680d050b56fdec\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0a7e0d0ef05440db03c3199e84d228db943b237f\", \"lessThan\": \"48a07f6e00d305597396da4d7494b81cec05b9d3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0a7e0d0ef05440db03c3199e84d228db943b237f\", \"lessThan\": \"44d807320000db0d0013372ad39b53e12d52f758\", \"versionType\": \"git\"}], \"programFiles\": [\"net/qrtr/af_qrtr.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.178\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.107\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.24\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.2.*\"}, {\"status\": \"unaffected\", \"version\": \"6.3\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/qrtr/af_qrtr.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/98a9cd82c541ef6cbdb829cd6c05cbbb471e373c\"}, {\"url\": \"https://git.kernel.org/stable/c/b9ba5906c42089f8e1d0001b7b50a7940f086cbb\"}, {\"url\": \"https://git.kernel.org/stable/c/aa95efa187b4114075f312b3c4680d050b56fdec\"}, {\"url\": \"https://git.kernel.org/stable/c/48a07f6e00d305597396da4d7494b81cec05b9d3\"}, {\"url\": \"https://git.kernel.org/stable/c/44d807320000db0d0013372ad39b53e12d52f758\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: qrtr: Fix a refcount bug in qrtr_recvmsg()\\n\\nSyzbot reported a bug as following:\\n\\nrefcount_t: addition on 0; use-after-free.\\n...\\nRIP: 0010:refcount_warn_saturate+0x17c/0x1f0 lib/refcount.c:25\\n...\\nCall Trace:\\n \u003cTASK\u003e\\n __refcount_add include/linux/refcount.h:199 [inline]\\n __refcount_inc include/linux/refcount.h:250 [inline]\\n refcount_inc include/linux/refcount.h:267 [inline]\\n kref_get include/linux/kref.h:45 [inline]\\n qrtr_node_acquire net/qrtr/af_qrtr.c:202 [inline]\\n qrtr_node_lookup net/qrtr/af_qrtr.c:398 [inline]\\n qrtr_send_resume_tx net/qrtr/af_qrtr.c:1003 [inline]\\n qrtr_recvmsg+0x85f/0x990 net/qrtr/af_qrtr.c:1070\\n sock_recvmsg_nosec net/socket.c:1017 [inline]\\n sock_recvmsg+0xe2/0x160 net/socket.c:1038\\n qrtr_ns_worker+0x170/0x1700 net/qrtr/ns.c:688\\n process_one_work+0x991/0x15c0 kernel/workqueue.c:2390\\n worker_thread+0x669/0x1090 kernel/workqueue.c:2537\\n\\nIt occurs in the concurrent scenario of qrtr_recvmsg() and\\nqrtr_endpoint_unregister() as following:\\n\\n\\tcpu0\\t\\t\\t\\t\\tcpu1\\nqrtr_recvmsg\\t\\t\\t\\tqrtr_endpoint_unregister\\nqrtr_send_resume_tx\\t\\t\\tqrtr_node_release\\nqrtr_node_lookup\\t\\t\\tmutex_lock(\u0026qrtr_node_lock)\\nspin_lock_irqsave(\u0026qrtr_nodes_lock, )\\trefcount_dec_and_test(\u0026node-\u003eref) [node-\u003eref == 0]\\nradix_tree_lookup [node != NULL]\\t__qrtr_node_release\\nqrtr_node_acquire\\t\\t\\tspin_lock_irqsave(\u0026qrtr_nodes_lock, )\\nkref_get(\u0026node-\u003eref) [WARNING]\\t\\t...\\n\\t\\t\\t\\t\\tmutex_unlock(\u0026qrtr_node_lock)\\n\\nUse qrtr_node_lock to protect qrtr_node_lookup() implementation, this\\nis actually improving the protection of node reference.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.178\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.107\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.24\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2.11\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.3\", \"versionStartIncluding\": \"5.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-09-18T16:04:21.257Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53445\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T19:23:11.519Z\", \"dateReserved\": \"2025-09-17T14:54:09.753Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T16:04:21.257Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

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.