{"id":"CVE-2026-98479","title":"kernel: scsi: libiscsi_tcp: Check the data direction of a Data-In PDU (CVE-2026-98479)","summary":"A flaw was found in the Linux kernel's iSCSI TCP subsystem. A malicious or compromised iSCSI storage server can cause memory corruption and data integrity loss on a connected client by sending an unexpected Data-In Protocol Data Unit (PDU)…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L","cvssSource":"vendor","cwe":"CWE-358","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-24","sourceUpdated":"2026-10-24T14:23:14+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98479.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98479.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98479"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554867"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98479"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98479"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98479.mbox"},{"url":"https://git.kernel.org/stable/c/79991b770fc3685b1d5cf805b659a879edd19931"},{"url":"https://git.kernel.org/stable/c/8db1232945bc663fb94f300090a1fc108de99296"},{"url":"https://git.kernel.org/stable/c/94e5bdd08e51c450d954bc592f591c233ca5c9df"},{"url":"https://git.kernel.org/stable/c/de96dc11aee0d058927bff94a168e3c5c46483e2"},{"url":"https://git.kernel.org/stable/c/e3b25bf2cf2496e85bc05b33360faf9fdf880e03"},{"url":"https://git.kernel.org/stable/c/ee56b5e18f566c0b5a183379dcd63d402cebf2f8"},{"url":"https://git.kernel.org/stable/c/24ffc919467d20951f0f132d1c75294e2e91e09b"},{"url":"https://git.kernel.org/stable/c/bce07e2f37b5e4a427d36fd6b1c14067b27591db"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00392,"epssPercentile":0.33139,"scores":{"vendor":6.5,"cna":7.5},"ingestedAt":"2026-10-18T15:45:12.295Z","slug":"CVE-2026-98479","body":"## Overview\n\nA flaw was found in the Linux kernel's iSCSI TCP subsystem. A malicious or compromised iSCSI storage server can cause memory corruption and data integrity loss on a connected client by sending an unexpected Data-In Protocol Data Unit (PDU) in response to a write command. Because the kernel fails to verify the expected data transfer direction before copying the payload into memory, target-supplied data overwrites the initiator's local buffers or file system cache pages.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98479.json)\n\n**kernel: scsi: libiscsi_tcp: Check the data direction of a Data-In PDU** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nOut of support scope","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":229541,"id":"CVE-2026-98479","ts":1793019838660,"field":"cvss","old":"7.5","new":"6.5"},{"seq":229540,"id":"CVE-2026-98479","ts":1793019838660,"field":"severity","old":"high","new":"medium"},{"seq":228964,"id":"CVE-2026-98479","ts":1792854122784,"field":"cvss","old":"6.5","new":"7.5"},{"seq":228963,"id":"CVE-2026-98479","ts":1792854122784,"field":"severity","old":"medium","new":"high"},{"seq":225509,"id":"CVE-2026-98479","ts":1792498275197,"field":"cvss","old":null,"new":"6.5"},{"seq":225508,"id":"CVE-2026-98479","ts":1792498275197,"field":"severity","old":"none","new":"medium"}]}