{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89489", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.713Z", "datePublished": "2026-09-11T19:43:42.164Z", "dateUpdated": "2026-09-11T19:43:42.164Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:43:42.164Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenrisc: fix arbitrary kernel memory access via or1k_atomic syscall\n\nsys_or1k_atomic() (syscall 244 in the \"or1k\" ABI) takes two user\npointers, v1 and v2, and swaps the words they point to in hand-written\nassembly.\n\n l.lwz r29,0(r4)\n l.lwz r27,0(r5)\n l.sw 0(r4),r27\n l.sw 0(r5),r29\n\nThe pointers are not checked with access_ok(). The four memory\naccesses also have no exception table entries.\n\nA caller passes a kernel address as either pointer, and the syscall\nreads from and writes to it directly.\n\nThis gives an unprivileged process a kernel read/write primitive. It\noverwrites kernel data such as the sys_call_table, gaining code\nexecution in kernel context.\n\nCheck both pointers before entering the critical section. Add fixups\nfor the four memory accesses so faults on valid but unmapped user\naddresses return -EFAULT.\n\n[shorne@gmail.com: fix comment style]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/openrisc/kernel/entry.S"], "versions": [{"version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a", "lessThan": "a520e8cac54fb403f3800125b606f55fcad42cb9", "status": "affected", "versionType": "git"}, {"version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a", "lessThan": "d64a75369cd0f2ee79afcc9d9ca34a3890989379", "status": "affected", "versionType": "git"}, {"version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a", "lessThan": "b53435c079c78f89f70a62dd5a322cca4e292b34", "status": "affected", "versionType": "git"}, {"version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a", "lessThan": "78004e9a87f240df03e2f73120d291763c32e0a7", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/openrisc/kernel/entry.S"], "versions": [{"version": "3.1", "status": "affected"}, {"version": "0", "lessThan": "3.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "3.1", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a520e8cac54fb403f3800125b606f55fcad42cb9"}, {"url": "https://git.kernel.org/stable/c/d64a75369cd0f2ee79afcc9d9ca34a3890989379"}, {"url": "https://git.kernel.org/stable/c/b53435c079c78f89f70a62dd5a322cca4e292b34"}, {"url": "https://git.kernel.org/stable/c/78004e9a87f240df03e2f73120d291763c32e0a7"}], "title": "openrisc: fix arbitrary kernel memory access via or1k_atomic syscall", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/openrisc/kernel/entry.S"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a520e8cac54fb403f3800125b606f55fcad42cb9", "status": "affected", "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a", "versionType": "git"}, {"lessThan": "d64a75369cd0f2ee79afcc9d9ca34a3890989379", "status": "affected", "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a", "versionType": "git"}, {"lessThan": "b53435c079c78f89f70a62dd5a322cca4e292b34", "status": "affected", "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a", "versionType": "git"}, {"lessThan": "78004e9a87f240df03e2f73120d291763c32e0a7", "status": "affected", "version": "9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/openrisc/kernel/entry.S"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.1"}, {"lessThan": "3.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "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\nopenrisc: fix arbitrary kernel memory access via or1k_atomic syscall\n\nsys_or1k_atomic() (syscall 244 in the \"or1k\" ABI) takes two user\npointers, v1 and v2, and swaps the words they point to in hand-written\nassembly.\n\n l.lwz r29,0(r4)\n l.lwz r27,0(r5)\n l.sw 0(r4),r27\n l.sw 0(r5),r29\n\nThe pointers are not checked with access_ok(). The four memory\naccesses also have no exception table entries.\n\nA caller passes a kernel address as either pointer, and the syscall\nreads from and writes to it directly.\n\nThis gives an unprivileged process a kernel read/write primitive. It\noverwrites kernel data such as the sys_call_table, gaining code\nexecution in kernel context.\n\nCheck both pointers before entering the critical section. Add fixups\nfor the four memory accesses so faults on valid but unmapped user\naddresses return -EFAULT.\n\n[shorne@gmail.com: fix comment style]"}], "id": "CVE-2026-89489", "lastModified": "2026-09-11T20:19:30.683", "metrics": {}, "published": "2026-09-11T20:19:30.683", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/78004e9a87f240df03e2f73120d291763c32e0a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a520e8cac54fb403f3800125b606f55fcad42cb9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b53435c079c78f89f70a62dd5a322cca4e292b34"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d64a75369cd0f2ee79afcc9d9ca34a3890989379"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Arbitrary code execution via or1k_atomic syscall", "id": "2532099", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532099"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-822", "details": ["A flaw was found in the Linux kernel. The `sys_or1k_atomic()` syscall, specific to the openrisc architecture, does not adequately validate user-provided pointers. An unprivileged process can exploit this by supplying kernel addresses to the syscall, gaining unauthorized read and write access to kernel memory. This vulnerability allows an attacker to overwrite critical kernel data, potentially leading to arbitrary code execution with elevated privileges."], "name": "CVE-2026-89489", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T19:43:42Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89489\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89489\nhttps://git.kernel.org/stable/c/78004e9a87f240df03e2f73120d291763c32e0a7\nhttps://git.kernel.org/stable/c/a520e8cac54fb403f3800125b606f55fcad42cb9\nhttps://git.kernel.org/stable/c/b53435c079c78f89f70a62dd5a322cca4e292b34\nhttps://git.kernel.org/stable/c/d64a75369cd0f2ee79afcc9d9ca34a3890989379"], "threat_severity": "Important"}

{}