{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46234", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.106Z", "datePublished": "2026-05-28T09:40:58.373Z", "dateUpdated": "2026-05-28T09:40:58.373Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-28T09:40:58.373Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: fix buffer size clamping order\n\nIn vsock_update_buffer_size(), the buffer size was being clamped to the\nmaximum first, and then to the minimum. If a user sets a minimum buffer\nsize larger than the maximum, the minimum check overrides the maximum\ncheck, inverting the constraint.\n\nThis breaks the intended socket memory boundaries by allowing the\nvsk->buffer_size to grow beyond the configured vsk->buffer_max_size.\n\nFix this by checking the minimum first, and then the maximum. This\nensures the buffer size never exceeds the buffer_max_size."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/vmw_vsock/af_vsock.c"], "versions": [{"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97", "lessThan": "a998a7e250bf976539e05a00ec64a81292afecaa", "status": "affected", "versionType": "git"}, {"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97", "lessThan": "310da27932dd0afe7ce7456dfe1f0814c3301f41", "status": "affected", "versionType": "git"}, {"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97", "lessThan": "2602f7bb5818e92315feeaeb71d8ce4d5c9ab160", "status": "affected", "versionType": "git"}, {"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97", "lessThan": "0b68881501460c3761f196469e1e503218c5e536", "status": "affected", "versionType": "git"}, {"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97", "lessThan": "d114bfdc9b76bf93b881e195b7ec957c14227bab", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/vmw_vsock/af_vsock.c"], "versions": [{"version": "5.5", "status": "affected"}, {"version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.90", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.32", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.9", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc1", "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": "5.5", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.90"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.32"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.0.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.1-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa"}, {"url": "https://git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41"}, {"url": "https://git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160"}, {"url": "https://git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536"}, {"url": "https://git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab"}], "title": "vsock: fix buffer size clamping order", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: fix buffer size clamping order\n\nIn vsock_update_buffer_size(), the buffer size was being clamped to the\nmaximum first, and then to the minimum. If a user sets a minimum buffer\nsize larger than the maximum, the minimum check overrides the maximum\ncheck, inverting the constraint.\n\nThis breaks the intended socket memory boundaries by allowing the\nvsk->buffer_size to grow beyond the configured vsk->buffer_max_size.\n\nFix this by checking the minimum first, and then the maximum. This\nensures the buffer size never exceeds the buffer_max_size."}], "id": "CVE-2026-46234", "lastModified": "2026-05-28T13:44:01.663", "metrics": {}, "published": "2026-05-28T10:16:39.043", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227bab"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: vsock: fix buffer size clamping order", "id": "2482640", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482640"}, "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": "draft"}, "cwe": "CWE-179", "details": ["A flaw was found in the Linux kernel's vsock component. This vulnerability stems from an incorrect order in which buffer sizes are validated, allowing a local user to set a minimum buffer size larger than the maximum. This can cause the socket's memory to exceed its defined boundaries, potentially leading to resource exhaustion or system instability, which could result in a Denial of Service (DoS)."], "name": "CVE-2026-46234", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46234\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46234\nhttps://lore.kernel.org/linux-cve-announce/2026052840-CVE-2026-46234-bed5@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97,a998a7e250bf976539e05a00ec64a81292afecaa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97,310da27932dd0afe7ce7456dfe1f0814c3301f41)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97,2602f7bb5818e92315feeaeb71d8ce4d5c9ab160)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97,0b68881501460c3761f196469e1e503218c5e536)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97,d114bfdc9b76bf93b881e195b7ec957c14227bab)"}}], "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": "affected", "versions": {"scheme": "generic", "value": "5.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.90,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.32,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.9,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc1,*]"}}], "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": "2026-05-28T12:30:16.888752+00:00", "updated": "2026-05-29T04:30:27.725399+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}