CVE-2023-52522

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An adjacent LAN/WiFi attacker can populate stale neighbour entries via ARP/ND and concurrently drive lookups, which is the highest reasonable reachability for this subsystem.\nAC:L - The attacker controls the reader side with continuous adjacent traffic and can force GC-eligible entries by filling the neighbour table past gc_thresh1 and letting entries go stale, so both sides of the race are attacker-driven rather than a blind wait for an uncontrolled condition.\nPR:N - ARP/NDISC packet processing and subsequent neighbour lookups require no authentication or local account on the victim; an unauthenticated adjacent peer can create entries and trigger concurrent RCU readers.\nUI:N - Exploitation requires only attacker-sent frames and the kernel's periodic GC workqueue; no victim user action such as mounting a filesystem or opening a file is needed.\nS:U - Impact is confined to kernel memory and availability within the same host security authority; this is ordinary in-kernel corruption/DoS, not a VM escape, IOMMU bypass, or sandbox boundary cross.\nC:H - Store tearing on an RCU-protected neighbour next pointer can expose readers to a corrupted pointer while walking the hash chain, and under the highest-severity reading that memory corruption enables use of unintended kernel objects and arbitrary disclosure primitives.\nI:H - The same corrupted-pointer walk is memory corruption on a core networking structure; following a torn next pointer can be leveraged for unintended writes or control-flow hijack rather than being limited to a benign crash.\nA:H - A torn or otherwise invalid neighbour pointer dereferenced on the packet/lookup fast path causes kernel oops/panic or hangs in networking, which is a high availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/neighbour.c"], "versions": [{"version": 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Los lectores usan rcu_deference(*np), necesitamos usar rcu_assign_pointer() o WRITE_ONCE() en el lado del escritor para evitar que la tienda se rompa. Utilizo rcu_assign_pointer() para tener soporte lockdep, esta fue la elecci\u00f3n hecha en neigh_flush_dev()."}], "id": "CVE-2023-52522", "lastModified": "2026-08-04T10:18:31.613", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52522", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-03-05T20:28:00.493037Z", "version": "2.0.3"}}]}, "published": "2024-03-02T22:15:48.170", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/147d89ee41434b97043c2dcb17a97dc151859baa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25563b581ba3a1f263a00e8c9a97f5e7363be6fd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ea52a2fb8e87067e26bbab4efb8872639240eb0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95eabb075a5902f4c0834ab1fb12dc35730c05af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a75152d233370362eebedb2643592e7c883cc9fc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f82aac8162871e87027692b36af335a2375d4580"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/147d89ee41434b97043c2dcb17a97dc151859baa"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25563b581ba3a1f263a00e8c9a97f5e7363be6fd"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2ea52a2fb8e87067e26bbab4efb8872639240eb0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95eabb075a5902f4c0834ab1fb12dc35730c05af"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a75152d233370362eebedb2643592e7c883cc9fc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f82aac8162871e87027692b36af335a2375d4580"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:7001", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:7000", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.22.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6998", "cpe": "cpe:/o:redhat:rhel_aus:8.6", "package": "kernel-0:4.18.0-372.124.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6998", "cpe": "cpe:/o:redhat:rhel_tus:8.6", "package": "kernel-0:4.18.0-372.124.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6998", "cpe": "cpe:/o:redhat:rhel_e4s:8.6", "package": "kernel-0:4.18.0-372.124.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6993", "cpe": "cpe:/o:redhat:rhel_eus:8.8", "package": "kernel-0:4.18.0-477.74.1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:2394", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2024:2394", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2024:9497", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.92.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-11-13T00:00:00Z"}, {"advisory": "RHSA-2024:9498", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.92.1.rt14.377.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-11-13T00:00:00Z"}], "bugzilla": {"description": "kernel: net: fix possible store tearing in neigh_periodic_work()", "id": "2267795", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267795"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: fix possible store tearing in neigh_periodic_work()\nWhile looking at a related syzbot report involving neigh_periodic_work(),\nI found that I forgot to add an annotation when deleting an\nRCU protected item from a list.\nReaders use rcu_deference(*np), we need to use either\nrcu_assign_pointer() or WRITE_ONCE() on writer side\nto prevent store tearing.\nI use rcu_assign_pointer() to have lockdep support,\nthis was the choice made in neigh_flush_dev().", "A flaw was found in the Linux kernel that allows for potential store tearing within the neigh_periodic_work() function, meaning a write operation on a value is not protected properly and could result in inconsistencies if another process or thread reads from that value before the operation is complete."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2023-52522", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52522\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52522\nhttps://lore.kernel.org/linux-cve-announce/2024030253-CVE-2023-52522-6abd@gregkh/T/#u"], "statement": "Within regulated environments, a combination of the following controls acts as a significant barrier to successfully exploiting a CWE-20: Improper Input Validation vulnerability and therefore downgrades the severity of this particular CVE from Moderate to Low.\nRed Hat enforces the principle of least functionality, ensuring that only essential features, services, and ports are enabled. This minimizes the number of components that could be affected by input validation vulnerabilities. Security testing and evaluation standards are implemented within the environment to rigorously test input validation mechanisms during the development lifecycle, while static code analysis identifies potential input validation vulnerabilities by default. Process isolation ensures that processes handling potentially malicious or unvalidated inputs run in isolated environments by separating execution domains for each process. Malicious code protections, such as IPS/IDS and antimalware solutions, help detect and mitigate malicious payloads stemming from input validation vulnerabilities. Finally, robust input validation and error-handling mechanisms ensure all user inputs are thoroughly validated, preventing improperly validated inputs from causing system instability, exposing sensitive data, or escalating risks further.", "threat_severity": "Moderate"}

{}