CVE-2026-43184

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43184", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.991Z", "datePublished": "2026-05-06T11:27:55.672Z", "dateUpdated": "2026-08-05T12:26:22.170Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:26:22.170Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrnbd-srv: Zero the rsp buffer before using it\n\nBefore using the data buffer to send back the response message, zero it\ncompletely. This prevents any stray bytes to be picked up by the client\nside when there the message is exchanged between different protocol\nversions."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - RNBD server is reached over the RTRS RDMA network transport, which listens for remote RDMA clients and dispatches their RNBD protocol messages. The vulnerable responses are generated from network-originated session-info/open requests.\nAC:L - No race or fragile timing is required; an attacker only needs to establish a normal RTRS/RNBD session and send the relevant request. The vulnerable buffers are used deterministically in the response path.\nPR:N - RTRS connection setup checks protocol magic/version and session naming, but there is no authentication before RNBD_MSG_SESS_INFO is processed. The leak is reachable before any remote block device is successfully opened.\nUI:N - Exploitation does not require any victim action after the RNBD/RTRS server is loaded and listening. A remote peer can initiate the protocol exchange directly.\nS:U - The vulnerability discloses memory from the same kernel/server security authority that processes the RNBD request. It does not cross a VM, IOMMU, or sandbox boundary.\nC:H - The server sends uninitialized bytes from unzeroed RTRS/RNBD response buffers back to the client in padding/reserved fields. Although each response is bounded, it is remotely repeatable across sessions and can expose stale kernel memory, so the higher confidentiality impact is chosen.\nI:N - The bug is an information disclosure caused by missing zero-initialization of response buffers. It does not provide a write primitive or alter server state beyond normal protocol behavior.\nA:N - The vulnerable path does not corrupt memory, panic, hang, or otherwise crash the server. It only leaks bytes in otherwise valid response messages."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/rnbd/rnbd-srv.c"], "versions": [{"version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "lessThan": "e4272754063d52c9ad0169865add8816ba696471", "status": "affected", "versionType": "git"}, {"version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "lessThan": "e2cacec7d4291300a282feb3af8eba57b93b15aa", "status": "affected", "versionType": "git"}, {"version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "lessThan": "b646e54d23b9b592d612a2036aab14e0f6c14206", "status": "affected", "versionType": "git"}, {"version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "lessThan": "30868a6a5238849d554295aff3ce61d242d7fad8", "status": "affected", "versionType": "git"}, {"version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "lessThan": "7aac0a30dcf41cdb510526740d9a2ab1520c5d98", "status": "affected", "versionType": "git"}, {"version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "lessThan": "c94ede3c436dfbd9cedd9cb69f604f6fc901b6a2", "status": "affected", "versionType": "git"}, {"version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "lessThan": "852475278ca5e96e0c0275950e1a84203e602b33", "status": "affected", "versionType": "git"}, {"version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "lessThan": "69d26698e4fd44935510553809007151b2fe4db5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/rnbd/rnbd-srv.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "5.8", "versionEndExcluding": "5.10.252"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.202"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.18.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e4272754063d52c9ad0169865add8816ba696471"}, {"url": "https://git.kernel.org/stable/c/e2cacec7d4291300a282feb3af8eba57b93b15aa"}, {"url": "https://git.kernel.org/stable/c/b646e54d23b9b592d612a2036aab14e0f6c14206"}, {"url": "https://git.kernel.org/stable/c/30868a6a5238849d554295aff3ce61d242d7fad8"}, {"url": "https://git.kernel.org/stable/c/7aac0a30dcf41cdb510526740d9a2ab1520c5d98"}, {"url": "https://git.kernel.org/stable/c/c94ede3c436dfbd9cedd9cb69f604f6fc901b6a2"}, {"url": "https://git.kernel.org/stable/c/852475278ca5e96e0c0275950e1a84203e602b33"}, {"url": "https://git.kernel.org/stable/c/69d26698e4fd44935510553809007151b2fe4db5"}], "title": "rnbd-srv: Zero the rsp buffer before using it", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/block/rnbd/rnbd-srv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e4272754063d52c9ad0169865add8816ba696471", "status": "affected", "version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "versionType": "git"}, {"lessThan": "e2cacec7d4291300a282feb3af8eba57b93b15aa", "status": "affected", "version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "versionType": "git"}, {"lessThan": "b646e54d23b9b592d612a2036aab14e0f6c14206", "status": "affected", "version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "versionType": "git"}, {"lessThan": "30868a6a5238849d554295aff3ce61d242d7fad8", "status": "affected", "version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "versionType": "git"}, {"lessThan": "7aac0a30dcf41cdb510526740d9a2ab1520c5d98", "status": "affected", "version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "versionType": "git"}, {"lessThan": "c94ede3c436dfbd9cedd9cb69f604f6fc901b6a2", "status": "affected", "version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "versionType": "git"}, {"lessThan": "852475278ca5e96e0c0275950e1a84203e602b33", "status": "affected", "version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "versionType": "git"}, {"lessThan": "69d26698e4fd44935510553809007151b2fe4db5", "status": "affected", "version": "2de6c8de192b9341ffa5e84afe1ce6196d4eef41", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/block/rnbd/rnbd-srv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"lessThan": "5.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.252", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.202", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.165", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.128", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.75", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.16", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "464BA61B-CE8B-4D1B-A592-4F2484708263", "versionEndExcluding": "5.10.252", "versionStartIncluding": "5.8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4002FC2B-1456-4666-B240-0EBF590C4671", "versionEndExcluding": "5.15.202", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654", "versionEndExcluding": "6.1.165", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2", "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrnbd-srv: Zero the rsp buffer before using it\n\nBefore using the data buffer to send back the response message, zero it\ncompletely. This prevents any stray bytes to be picked up by the client\nside when there the message is exchanged between different protocol\nversions."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nrnbd-srv: Poner a cero el b\u00fafer rsp antes de usarlo\n\nAntes de usar el b\u00fafer de datos para devolver el mensaje de respuesta, p\u00f3ngalo a cero completamente. Esto evita que cualquier byte residual sea capturado por el cliente cuando el mensaje se intercambia entre diferentes versiones de protocolo."}], "id": "CVE-2026-43184", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-06T12:16:37.053", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/30868a6a5238849d554295aff3ce61d242d7fad8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/69d26698e4fd44935510553809007151b2fe4db5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7aac0a30dcf41cdb510526740d9a2ab1520c5d98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/852475278ca5e96e0c0275950e1a84203e602b33"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b646e54d23b9b592d612a2036aab14e0f6c14206"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c94ede3c436dfbd9cedd9cb69f604f6fc901b6a2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e2cacec7d4291300a282feb3af8eba57b93b15aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e4272754063d52c9ad0169865add8816ba696471"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: rnbd-srv: Zero the rsp buffer before using it", "id": "2467096", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467096"}, "csaw": false, "cwe": "CWE-908", "details": ["A flaw was found in the Linux kernel's `rnbd-srv` component. This vulnerability arises from the failure to properly clear the response buffer before sending data. A remote client could potentially receive unintended data, leading to information disclosure."], "name": "CVE-2026-43184", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43184\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43184\nhttps://lore.kernel.org/linux-cve-announce/2026050640-CVE-2026-43184-17d4@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e4272754063d52c9ad0169865add8816ba696471)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,e2cacec7d4291300a282feb3af8eba57b93b15aa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b646e54d23b9b592d612a2036aab14e0f6c14206)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,30868a6a5238849d554295aff3ce61d242d7fad8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,7aac0a30dcf41cdb510526740d9a2ab1520c5d98)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,c94ede3c436dfbd9cedd9cb69f604f6fc901b6a2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,852475278ca5e96e0c0275950e1a84203e602b33)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,69d26698e4fd44935510553809007151b2fe4db5)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.252,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.202,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.165,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.128,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.75,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.16,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.6,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-06T14:15:05.984047+00:00", "updated": "2026-05-11T23:15:09.789937+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-908", "NVD-CWE-noinfo"]}