CVE-2026-98035

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98035", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:19:56.070Z", "datePublished": "2026-09-25T10:23:49.935Z", "dateUpdated": "2026-10-19T09:12:40.152Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:12:40.152Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Cancel special fields when recycling rhtab elements\n\nrhtab_map_update_existing() and rhtab_delete_elem() call\nbpf_obj_free_fields() when replacing or deleting a value. These map\noperations can run from BPF programs in NMI context, where releasing a\nreferenced kptr or another complex field is not generally safe.\n\nArray and hash maps avoid that problem by cancelling only the asynchronous\nfields which can be stopped safely in the caller context. Other ownership\nstate remains attached to the allocation until its memory allocator\ndestructor performs the final cleanup.\n\nUse bpf_obj_cancel_fields() for the corresponding rhtab paths as well. This\ncancels timers, workqueues, and task work while allowing rhtab_mem_dtor() to\nrelease referenced kptrs when the allocation is eventually destroyed.\n\n[ kkd: Rebased, used direct helper calls, and rewrote the commit log ]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/hashtab.c"], "versions": [{"version": "6905f8601298ecd2d1932a4b4849bf265201118e", "lessThan": "28fde1356dbc35e20a9f22a5ee65af09698fdf92", "status": "affected", "versionType": "git"}, {"version": "6905f8601298ecd2d1932a4b4849bf265201118e", "lessThan": "65cc95eba9e8b46312cac38c227473605a4b996a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/hashtab.c"], "versions": [{"version": "7.2", "status": "affected"}, {"version": "0", "lessThan": "7.2", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "7.2", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/28fde1356dbc35e20a9f22a5ee65af09698fdf92"}, {"url": "https://git.kernel.org/stable/c/65cc95eba9e8b46312cac38c227473605a4b996a"}], "title": "bpf: Cancel special fields when recycling rhtab elements", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/bpf/hashtab.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "28fde1356dbc35e20a9f22a5ee65af09698fdf92", "status": "affected", "version": "6905f8601298ecd2d1932a4b4849bf265201118e", "versionType": "git"}, {"lessThan": "65cc95eba9e8b46312cac38c227473605a4b996a", "status": "affected", "version": "6905f8601298ecd2d1932a4b4849bf265201118e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/bpf/hashtab.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.2"}, {"lessThan": "7.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\nbpf: Cancel special fields when recycling rhtab elements\n\nrhtab_map_update_existing() and rhtab_delete_elem() call\nbpf_obj_free_fields() when replacing or deleting a value. These map\noperations can run from BPF programs in NMI context, where releasing a\nreferenced kptr or another complex field is not generally safe.\n\nArray and hash maps avoid that problem by cancelling only the asynchronous\nfields which can be stopped safely in the caller context. Other ownership\nstate remains attached to the allocation until its memory allocator\ndestructor performs the final cleanup.\n\nUse bpf_obj_cancel_fields() for the corresponding rhtab paths as well. This\ncancels timers, workqueues, and task work while allowing rhtab_mem_dtor() to\nrelease referenced kptrs when the allocation is eventually destroyed.\n\n[ kkd: Rebased, used direct helper calls, and rewrote the commit log ]"}], "id": "CVE-2026-98035", "lastModified": "2026-10-19T10:17:57.480", "metrics": {}, "published": "2026-09-25T11:17:32.237", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/28fde1356dbc35e20a9f22a5ee65af09698fdf92"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/65cc95eba9e8b46312cac38c227473605a4b996a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: bpf: Cancel special fields when recycling rhtab elements", "id": "2541121", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541121"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-663", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Cancel special fields when recycling rhtab elements\nrhtab_map_update_existing() and rhtab_delete_elem() call\nbpf_obj_free_fields() when replacing or deleting a value. These map\noperations can run from BPF programs in NMI context, where releasing a\nreferenced kptr or another complex field is not generally safe.\nArray and hash maps avoid that problem by cancelling only the asynchronous\nfields which can be stopped safely in the caller context. Other ownership\nstate remains attached to the allocation until its memory allocator\ndestructor performs the final cleanup.\nUse bpf_obj_cancel_fields() for the corresponding rhtab paths as well. This\ncancels timers, workqueues, and task work while allowing rhtab_mem_dtor() to\nrelease referenced kptrs when the allocation is eventually destroyed.\n[ kkd: Rebased, used direct helper calls, and rewrote the commit log ]", "A flaw was found in the Linux kernel's BPF subsystem. When updating or deleting elements in resizable hash tables, the kernel directly releases special object fields rather than safely deferring their cancellation, which is not safe when running in Non-Maskable Interrupt (NMI) context. A local user capable of running BPF programs could exploit this flaw to cause a kernel crash, resulting in a denial of service (DoS)."], "name": "CVE-2026-98035", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"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": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98035\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98035\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98035.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6905f8601298ecd2d1932a4b4849bf265201118e,28fde1356dbc35e20a9f22a5ee65af09698fdf92)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6905f8601298ecd2d1932a4b4849bf265201118e,65cc95eba9e8b46312cac38c227473605a4b996a)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-25T17:15:15.316008+00:00", "updated": "2026-10-01T01:45:16.943383+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}