CVE-2025-38012

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38012", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.977Z", "datePublished": "2025-06-18T09:28:22.057Z", "dateUpdated": "2026-08-05T11:58:57.764Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:58:57.764Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: bpf_iter_scx_dsq_new() should always initialize iterator\n\nBPF programs may call next() and destroy() on BPF iterators even after new()\nreturns an error value (e.g. bpf_for_each() macro ignores error returns from\nnew()). bpf_iter_scx_dsq_new() could leave the iterator in an uninitialized\nstate after an error return causing bpf_iter_scx_dsq_next() to dereference\ngarbage data. Make bpf_iter_scx_dsq_new() always clear $kit->dsq so that\nnext() and destroy() become noops."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Exploitation requires loading and running a BPF program via the local `bpf()` syscall (BPF_PROG_LOAD + BPF_PROG_TEST_RUN, or a struct_ops/tracing attach). There is no remote or adjacent-network path to the sched_ext DSQ iterator kfuncs.\nAC:L - The trigger is fully deterministic \u2014 pass an invalid flag bit to `bpf_iter_scx_dsq_new()` and call `next()` \u2014 with no race, no timing window, and no dependence on ambient memory layout, since the attacker pre-seeds the iterator stack slots with values of their choosing. `CONFIG_SCHED_CLASS_EXT` is enabled in mainstream 6.12+ distro kernels.\nPR:L - Only CAP_BPF is needed: the iterator kfuncs are registered for `BPF_PROG_TYPE_SYSCALL`, which is not perfmon/net-admin gated, and `bpf_prog_test_run_syscall()` adds no capability check. `bpf_token_capable()` allows CAP_BPF to be delegated into an unprivileged user namespace via a bpffs BPF token, so an ordinary low-privileged container user can reach it.\nUI:N - The attacker's own BPF program triggers the flaw synchronously; no victim action, mount, or file open is involved.\nS:U - The corruption and its consequences are confined to the kernel's own security authority \u2014 a standard local privilege escalation with no VM, IOMMU, or hypervisor boundary crossed.\nC:H - `nldsq_next_task()` dereferences the attacker-supplied `kit->dsq` pointer and then walks arbitrary `list_head` next/prev chains, yielding an arbitrary kernel-memory read primitive that can disclose credentials, keys, and KASLR state.\nI:H - The uninitialized `kit->cursor` drives `list_move()`/`list_del_init()` against attacker-chosen addresses, and `raw_spin_lock_irqsave(&kit->dsq->lock)` performs a read-modify-write at an arbitrary address \u2014 a controlled kernel write primitive leading to full privilege escalation.\nA:H - Dereferencing garbage pointers under `raw_spin_lock_irqsave()` reliably produces a kernel oops or a hard lockup on a bogus spinlock, and any unprivileged-BPF-capable process can repeat it at will to panic the machine."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/sched/ext.c"], "versions": [{"version": "650ba21b131ed1f8ee57826b2c6295a3be221132", "lessThan": "0102989af4c334d1d98b2a0fd4d61a5152e39b72", "status": "affected", "versionType": "git"}, {"version": "650ba21b131ed1f8ee57826b2c6295a3be221132", "lessThan": "255dd31bfc4a67a19b1fc2cd130a50284dadfe3a", "status": "affected", "versionType": "git"}, {"version": "650ba21b131ed1f8ee57826b2c6295a3be221132", "lessThan": "428dc9fc0873989d73918d4a9cc22745b7bbc799", "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/sched/ext.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.30", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14.8", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15", "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": "6.12", "versionEndExcluding": "6.12.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.14.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.15"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0102989af4c334d1d98b2a0fd4d61a5152e39b72"}, {"url": "https://git.kernel.org/stable/c/255dd31bfc4a67a19b1fc2cd130a50284dadfe3a"}, {"url": "https://git.kernel.org/stable/c/428dc9fc0873989d73918d4a9cc22745b7bbc799"}], "title": "sched_ext: bpf_iter_scx_dsq_new() should always initialize iterator", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/sched/ext.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0102989af4c334d1d98b2a0fd4d61a5152e39b72", "status": "affected", "version": "650ba21b131ed1f8ee57826b2c6295a3be221132", "versionType": "git"}, {"lessThan": "255dd31bfc4a67a19b1fc2cd130a50284dadfe3a", "status": "affected", "version": "650ba21b131ed1f8ee57826b2c6295a3be221132", "versionType": "git"}, {"lessThan": "428dc9fc0873989d73918d4a9cc22745b7bbc799", "status": "affected", "version": "650ba21b131ed1f8ee57826b2c6295a3be221132", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/sched/ext.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.30", "versionType": "semver"}, {"lessThanOrEqual": "6.14.*", "status": "unaffected", "version": "6.14.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.15", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F3FBF2D7-2AEE-456E-97E5-22E9926488AF", "versionEndExcluding": "6.12.30", "versionStartIncluding": "6.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D4458049-AD51-4F1B-BAB9-C32B53A54DE1", "versionEndExcluding": "6.14.8", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*", "matchCriteriaId": "8D465631-2980-487A-8E65-40AE2B9F8ED1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*", "matchCriteriaId": "4C9D071F-B28E-46EC-AC61-22B913390211", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*", "matchCriteriaId": "13FC0DDE-E513-465E-9E81-515702D49B74", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*", "matchCriteriaId": "8C7B5B0E-4EEB-48F5-B4CF-0935A7633845", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*", "matchCriteriaId": "2D240580-3048-49B2-9E27-F115A9DF8224", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*", "matchCriteriaId": "90320558-E553-4EF5-8A0B-0F5D20113BD2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: bpf_iter_scx_dsq_new() should always initialize iterator\n\nBPF programs may call next() and destroy() on BPF iterators even after new()\nreturns an error value (e.g. bpf_for_each() macro ignores error returns from\nnew()). bpf_iter_scx_dsq_new() could leave the iterator in an uninitialized\nstate after an error return causing bpf_iter_scx_dsq_next() to dereference\ngarbage data. Make bpf_iter_scx_dsq_new() always clear $kit->dsq so that\nnext() and destroy() become noops."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sched_ext: bpf_iter_scx_dsq_new() siempre debe inicializar el iterador. Los programas BPF pueden llamar a next() y destroy() en iteradores BPF incluso despu\u00e9s de que new() devuelva un valor de error (p. ej., la macro bpf_for_each() ignora los errores devueltos por new()). bpf_iter_scx_dsq_new() podr\u00eda dejar el iterador sin inicializar despu\u00e9s de un error, lo que provoca que bpf_iter_scx_dsq_next() desreferencia datos innecesarios. Aseg\u00farese de que bpf_iter_scx_dsq_new() siempre borre $kit->dsq para que next() y destroy() se conviertan en noops."}], "id": "CVE-2025-38012", "lastModified": "2026-07-30T06:22:44.367", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-06-18T10:15:32.560", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0102989af4c334d1d98b2a0fd4d61a5152e39b72"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/255dd31bfc4a67a19b1fc2cd130a50284dadfe3a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/428dc9fc0873989d73918d4a9cc22745b7bbc799"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: sched_ext: bpf_iter_scx_dsq_new() should always initialize iterator", "id": "2373366", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373366"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsched_ext: bpf_iter_scx_dsq_new() should always initialize iterator\nBPF programs may call next() and destroy() on BPF iterators even after new()\nreturns an error value (e.g. bpf_for_each() macro ignores error returns from\nnew()). bpf_iter_scx_dsq_new() could leave the iterator in an uninitialized\nstate after an error return causing bpf_iter_scx_dsq_next() to dereference\ngarbage data. Make bpf_iter_scx_dsq_new() always clear $kit->dsq so that\nnext() and destroy() become noops."], "name": "CVE-2025-38012", "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"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38012\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38012\nhttps://lore.kernel.org/linux-cve-announce/2025061843-CVE-2025-38012-6d55@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-06-23T08:53:47.560291+00:00", "updated": "2025-06-23T08:53:47.560347+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}