{"id":"CVE-2026-89730","title":"kernel: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write (CVE-2026-89730)","summary":"A flaw was found in the `altera-cvp` FPGA driver within the Linux kernel. The `altera_cvp_send_block()` function can perform an out-of-bounds read when processing the trailing bytes of an input buffer. This occurs if the buffer ends at a p…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-125","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T08:02:09+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89730.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89730.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89730"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532368"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89730"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89730"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89730.mbox"},{"url":"https://git.kernel.org/stable/c/4dc1051939e499c838229af035464a5fc7671198"},{"url":"https://git.kernel.org/stable/c/827ec385458adeeda651de2b6f3537e386b1a8d9"},{"url":"https://git.kernel.org/stable/c/9da70a43b5fea60d758137f7f0ccfe19356cb5bb"},{"url":"https://git.kernel.org/stable/c/b138bc665e21d4422382ab43aebdf0a2b7bb9cb3"},{"url":"https://git.kernel.org/stable/c/447b3c893987a0106a65f04b62ec3271892e9d98"},{"url":"https://git.kernel.org/stable/c/3b8938f5fbcf4a918785f9cb4b108782eb4ea717"},{"url":"https://git.kernel.org/stable/c/2564ac3d3b8b47cd9692a5bf42d668ed7218b54e"},{"url":"https://git.kernel.org/stable/c/8f3365ed2a5db2ac95ab70a6c47561db39d24537"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.0021,"epssPercentile":0.11549,"ingestedAt":"2026-09-14T15:23:07.449Z","slug":"CVE-2026-89730","body":"## Overview\n\nA flaw was found in the `altera-cvp` FPGA driver within the Linux kernel. The `altera_cvp_send_block()` function can perform an out-of-bounds read when processing the trailing bytes of an input buffer. This occurs if the buffer ends at a page or scatterlist boundary, causing the function to read past valid image data. A local attacker could potentially exploit this to trigger a system fault, leading to a denial of service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89730.json)\n\n**kernel: fpga: altera-cvp: Avoid out-of-bounds read in trailing byte write** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.\n\nNot affected:\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\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205479,"id":"CVE-2026-89730","ts":1789576721682,"field":"cvss","old":"4.4","new":"5.5"},{"seq":203978,"id":"CVE-2026-89730","ts":1789490230885,"field":"cvss","old":null,"new":"4.4"},{"seq":203977,"id":"CVE-2026-89730","ts":1789490230885,"field":"severity","old":"none","new":"medium"},{"seq":147303,"id":"CVE-2026-89730","ts":1789270208360,"field":"cvss","old":null,"new":"4.4"},{"seq":147302,"id":"CVE-2026-89730","ts":1789270208360,"field":"severity","old":"none","new":"medium"},{"seq":109060,"id":"CVE-2026-89730","ts":1789183730152,"field":"cvss","old":null,"new":"4.4"},{"seq":109059,"id":"CVE-2026-89730","ts":1789183730152,"field":"severity","old":"none","new":"medium"}]}