CVE-2026-93078

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93078", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T15:57:05.661Z", "datePublished": "2026-09-17T16:10:59.686Z", "dateUpdated": "2026-10-19T09:05:14.083Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:05:14.083Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/features: Reject Set Features output buffer smaller than the header\n\ncxlctl_set_feature() sizes its output buffer from the user's\nfwctl_rpc.out_len but never checks it is large enough to hold even the\nfwctl_rpc_cxl_out header. With out_len == 0 , kvzalloc() returns\nZERO_SIZE_PTR, which passes the !rpc_out check, the subsequent\nrpc_out->size = 0 then writes through the poison pointer.\n\nReject requests whose output buffer can't hold the response header,\nbefore allocating. The Set Feature reply carries no payload, so the\nheader is all that is required."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/cxl/core/features.c"], "versions": [{"version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3", "lessThan": "1281dc84c81577b51e2b61c24617c9f44b2cdb99", "status": "affected", "versionType": "git"}, {"version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3", "lessThan": "16b7c99eff030c6ea11ca24efa4b9f989cc74093", "status": "affected", "versionType": "git"}, {"version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3", "lessThan": "cde18d6c1d913a67ab0afd3d9475ece4be79da50", "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/cxl/core/features.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.15", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1281dc84c81577b51e2b61c24617c9f44b2cdb99"}, {"url": "https://git.kernel.org/stable/c/16b7c99eff030c6ea11ca24efa4b9f989cc74093"}, {"url": "https://git.kernel.org/stable/c/cde18d6c1d913a67ab0afd3d9475ece4be79da50"}], "title": "cxl/features: Reject Set Features output buffer smaller than the header", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/cxl/core/features.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "1281dc84c81577b51e2b61c24617c9f44b2cdb99", "status": "affected", "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3", "versionType": "git"}, {"lessThan": "16b7c99eff030c6ea11ca24efa4b9f989cc74093", "status": "affected", "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3", "versionType": "git"}, {"lessThan": "cde18d6c1d913a67ab0afd3d9475ece4be79da50", "status": "affected", "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/cxl/core/features.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/features: Reject Set Features output buffer smaller than the header\n\ncxlctl_set_feature() sizes its output buffer from the user's\nfwctl_rpc.out_len but never checks it is large enough to hold even the\nfwctl_rpc_cxl_out header. With out_len == 0 , kvzalloc() returns\nZERO_SIZE_PTR, which passes the !rpc_out check, the subsequent\nrpc_out->size = 0 then writes through the poison pointer.\n\nReject requests whose output buffer can't hold the response header,\nbefore allocating. The Set Feature reply carries no payload, so the\nheader is all that is required."}], "id": "CVE-2026-93078", "lastModified": "2026-10-19T10:16:57.760", "metrics": {}, "published": "2026-09-17T17:18:01.743", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1281dc84c81577b51e2b61c24617c9f44b2cdb99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/16b7c99eff030c6ea11ca24efa4b9f989cc74093"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cde18d6c1d913a67ab0afd3d9475ece4be79da50"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eb5dfcb9e36d0e46089fec777d911313c1876fa3,1281dc84c81577b51e2b61c24617c9f44b2cdb99)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eb5dfcb9e36d0e46089fec777d911313c1876fa3,16b7c99eff030c6ea11ca24efa4b9f989cc74093)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[eb5dfcb9e36d0e46089fec777d911313c1876fa3,cde18d6c1d913a67ab0afd3d9475ece4be79da50)"}}], "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": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-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": "2026-09-19T12:30:17.758825+00:00", "updated": "2026-09-19T14:00:14.941742+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-119", "CWE-476"]}