{"id":"CVE-2026-89770","title":"kernel: iomap: don't free integrity payload that doesn't exist (CVE-2026-89770)","summary":"A flaw was found in the `iomap` component of the Linux kernel. This vulnerability occurs when Protection Information (PI) verification is disabled on a block device, causing `fs_bio_integrity_alloc` to not allocate a bio integrity payload.…","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-476","vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-15","sourceUpdated":"2026-09-15T14:06:07+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89770.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89770.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89770"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532471"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89770"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89770"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89770.mbox"},{"url":"https://git.kernel.org/stable/c/65651f1001aa3638909bc58c7b2b46160692757b"},{"url":"https://git.kernel.org/stable/c/8a8685b32c0718cc7b2cb4d6202e5a5b8e0a8e2d"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00145,"epssPercentile":0.04156,"ingestedAt":"2026-09-14T11:11:19.884Z","slug":"CVE-2026-89770","body":"## Overview\n\nA flaw was found in the `iomap` component of the Linux kernel. This vulnerability occurs when Protection Information (PI) verification is disabled on a block device, causing `fs_bio_integrity_alloc` to not allocate a bio integrity payload. Subsequently, the `iomap_bio_read_folio_range_sync` function attempts to free this non-existent payload, leading to a NULL pointer dereference. This could potentially result in a system crash or denial of service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat OpenShift Container Platform 4 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89770.json)\n\n**kernel: iomap: don't free integrity payload that doesn't exist** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\n\nAffected:\n\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":203860,"id":"CVE-2026-89770","ts":1789490210242,"field":"cvss","old":null,"new":"5.5"},{"seq":203859,"id":"CVE-2026-89770","ts":1789490210242,"field":"severity","old":"none","new":"medium"},{"seq":147129,"id":"CVE-2026-89770","ts":1789270195676,"field":"cvss","old":null,"new":"4.7"},{"seq":147128,"id":"CVE-2026-89770","ts":1789270195676,"field":"severity","old":"none","new":"medium"},{"seq":108888,"id":"CVE-2026-89770","ts":1789183729415,"field":"cvss","old":null,"new":"4.7"},{"seq":108887,"id":"CVE-2026-89770","ts":1789183729415,"field":"severity","old":"none","new":"medium"}]}