CVE-2026-95507

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{"acknowledgement": "Red Hat would like to thank Stuart Thomas for reporting this issue.", "bugzilla": {"description": "libslirp: libslirp: out-of-bounds read in NC-SI OEM response handler discloses host memory to guest", "id": "2537747", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2537747"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-125", "details": ["An out-of-bounds read was found in the NC-SI OEM response handler of libslirp. A truncated NC-SI OEM Ethernet frame causes ncsi_rsp_handler_oem() to read up to 4 bytes beyond the supplied packet length and reflect the value into the response sent to the guest, resulting in guest-observable disclosure of adjacent host process memory."], "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-2026-95507", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "libslirp", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "container-tools:rhel8/libslirp", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "libslirp", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "libslirp", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-22T07:23:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-95507\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-95507"], "statement": "Moderate: A flaw in libslirp's NC-SI OEM response handler allows a malicious guest to trigger an out-of-bounds read, leading to the disclosure of up to 4 bytes of adjacent host RX-buffer memory. This bounded memory disclosure is guest-triggerable and does not involve write access or code execution on the host.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 81.0, "source": "matching"}]}, "product": "libslirp", "vendor": "libslirp_project"}], "created": "2026-09-22T13:30:17.002376+00:00", "updated": "2026-10-21T15:15:14.081305+00:00", "vendors": ["libslirp_project", "libslirp_project$PRODUCT$libslirp"]}