CVE-2025-68208

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68208", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T13:41:40.255Z", "datePublished": "2025-12-16T13:48:35.298Z", "dateUpdated": "2026-10-15T22:02:47.833Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:10:13.855Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: account for current allocated stack depth in widen_imprecise_scalars()\n\nThe usage pattern for widen_imprecise_scalars() looks as follows:\n\n prev_st = find_prev_entry(env, ...);\n queued_st = push_stack(...);\n widen_imprecise_scalars(env, prev_st, queued_st);\n\nWhere prev_st is an ancestor of the queued_st in the explored states\ntree. This ancestor is not guaranteed to have same allocated stack\ndepth as queued_st. E.g. in the following case:\n\n def main():\n for i in 1..2:\n foo(i) // same callsite, differnt param\n\n def foo(i):\n if i == 1:\n use 128 bytes of stack\n iterator based loop\n\nHere, for a second 'foo' call prev_st->allocated_stack is 128,\nwhile queued_st->allocated_stack is much smaller.\nwiden_imprecise_scalars() needs to take this into account and avoid\naccessing bpf_verifier_state->frame[*]->stack out of bounds."}], "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 - The attacker reaches the vulnerable verifier through a local BPF_PROG_LOAD syscall; no network or physical path invokes it.\nAC:L - A crafted BPF program deterministically creates the mismatched verifier stack depths, as confirmed by the upstream KASAN regression test. Any heap grooming needed for exploitation is attacker-controlled, with no race or victim-dependent condition.\nPR:L - The trigger requires permission to load privileged BPF bytecode; ordinary unprivileged BPF is insufficient. However, CAP_BPF can be delegated through a BPF token to a user namespace, making this reachable without host-administrator privileges in a reasonable container deployment.\nUI:N - Submitting the crafted BPF program directly triggers verification without any action by another user.\nS:U - The vulnerability compromises the kernel containing the BPF verifier and does not inherently cross a VM, IOMMU, or separate security authority boundary.\nC:H - The loop can read numerous bpf_stack_state entries beyond the shorter heap allocation, substantially exceeding a small bounded disclosure. Adjacent verifier-state corruption can also enable further kernel-memory disclosure primitives.\nI:H - If attacker-groomed out-of-bounds bytes resemble an imprecise spilled scalar, maybe_widen_reg() passes the invalid pointer to __mark_reg_unknown(), overwriting an entire bpf_reg_state outside the allocation. This kernel-heap corruption can support data or control-flow manipulation.\nA:H - The upstream reproducer triggers a KASAN out-of-bounds failure, and deeper mismatches can fault or corrupt adjacent kernel objects. Repeated BPF_PROG_LOAD requests can therefore crash or panic the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/verifier.c"], "versions": [{"version": "ab470fefce2837e66b771c60858118d50bb5bb10", "lessThan": "64b12dca2b0abcb5fc0542887d18b926ea5cf711", "status": "affected", "versionType": "git"}, {"version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "lessThan": "9944c7938cd5b3f37b0afec0481c7c015e4f1c58", "status": "affected", "versionType": "git"}, {"version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "lessThan": "57e04e2ff56e32f923154f0f7bc476fcb596ffe7", "status": "affected", "versionType": "git"}, {"version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "lessThan": "b0c8e6d3d866b6a7f73877f71968dbffd27b7785", "status": "affected", "versionType": "git"}, {"version": "6.6.15", "lessThan": "6.6.117", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/verifier.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.117", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.59", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.9", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "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": "6.6.15", "versionEndExcluding": "6.6.117"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.17.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/64b12dca2b0abcb5fc0542887d18b926ea5cf711"}, {"url": "https://git.kernel.org/stable/c/9944c7938cd5b3f37b0afec0481c7c015e4f1c58"}, {"url": "https://git.kernel.org/stable/c/57e04e2ff56e32f923154f0f7bc476fcb596ffe7"}, {"url": "https://git.kernel.org/stable/c/b0c8e6d3d866b6a7f73877f71968dbffd27b7785"}], "title": "bpf: account for current allocated stack depth in widen_imprecise_scalars()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-68208", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T22:00:14.254468Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T22:02:47.833Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-68208", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T22:00:14.254468Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T22:00:14.848Z"}}], "cna": {"title": "bpf: account for current allocated stack depth in widen_imprecise_scalars()", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The attacker reaches the vulnerable verifier through a local BPF_PROG_LOAD syscall; no network or physical path invokes it.\nAC:L - A crafted BPF program deterministically creates the mismatched verifier stack depths, as confirmed by the upstream KASAN regression test. Any heap grooming needed for exploitation is attacker-controlled, with no race or victim-dependent condition.\nPR:L - The trigger requires permission to load privileged BPF bytecode; ordinary unprivileged BPF is insufficient. However, CAP_BPF can be delegated through a BPF token to a user namespace, making this reachable without host-administrator privileges in a reasonable container deployment.\nUI:N - Submitting the crafted BPF program directly triggers verification without any action by another user.\nS:U - The vulnerability compromises the kernel containing the BPF verifier and does not inherently cross a VM, IOMMU, or separate security authority boundary.\nC:H - The loop can read numerous bpf_stack_state entries beyond the shorter heap allocation, substantially exceeding a small bounded disclosure. Adjacent verifier-state corruption can also enable further kernel-memory disclosure primitives.\nI:H - If attacker-groomed out-of-bounds bytes resemble an imprecise spilled scalar, maybe_widen_reg() passes the invalid pointer to __mark_reg_unknown(), overwriting an entire bpf_reg_state outside the allocation. This kernel-heap corruption can support data or control-flow manipulation.\nA:H - The upstream reproducer triggers a KASAN out-of-bounds failure, and deeper mismatches can fault or corrupt adjacent kernel objects. Repeated BPF_PROG_LOAD requests can therefore crash or panic the kernel."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ab470fefce2837e66b771c60858118d50bb5bb10", "lessThan": "64b12dca2b0abcb5fc0542887d18b926ea5cf711", "versionType": "git"}, {"status": "affected", "version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "lessThan": "9944c7938cd5b3f37b0afec0481c7c015e4f1c58", "versionType": "git"}, {"status": "affected", "version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "lessThan": "57e04e2ff56e32f923154f0f7bc476fcb596ffe7", "versionType": "git"}, {"status": "affected", "version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "lessThan": "b0c8e6d3d866b6a7f73877f71968dbffd27b7785", "versionType": "git"}, {"status": "affected", "version": "6.6.15", "lessThan": "6.6.117", "versionType": "semver"}], "programFiles": ["kernel/bpf/verifier.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"status": "unaffected", "version": "0", "lessThan": "6.7", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.117", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.59", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.17.9", "versionType": "semver", "lessThanOrEqual": "6.17.*"}, {"status": "unaffected", "version": "6.18", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/bpf/verifier.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/64b12dca2b0abcb5fc0542887d18b926ea5cf711"}, {"url": "https://git.kernel.org/stable/c/9944c7938cd5b3f37b0afec0481c7c015e4f1c58"}, {"url": "https://git.kernel.org/stable/c/57e04e2ff56e32f923154f0f7bc476fcb596ffe7"}, {"url": "https://git.kernel.org/stable/c/b0c8e6d3d866b6a7f73877f71968dbffd27b7785"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: account for current allocated stack depth in widen_imprecise_scalars()\n\nThe usage pattern for widen_imprecise_scalars() looks as follows:\n\n prev_st = find_prev_entry(env, ...);\n queued_st = push_stack(...);\n widen_imprecise_scalars(env, prev_st, queued_st);\n\nWhere prev_st is an ancestor of the queued_st in the explored states\ntree. This ancestor is not guaranteed to have same allocated stack\ndepth as queued_st. E.g. in the following case:\n\n def main():\n for i in 1..2:\n foo(i) // same callsite, differnt param\n\n def foo(i):\n if i == 1:\n use 128 bytes of stack\n iterator based loop\n\nHere, for a second 'foo' call prev_st->allocated_stack is 128,\nwhile queued_st->allocated_stack is much smaller.\nwiden_imprecise_scalars() needs to take this into account and avoid\naccessing bpf_verifier_state->frame[*]->stack out of bounds."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.117", "versionStartIncluding": "6.6.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.59", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.17.9", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:10:13.855Z"}}}, "cveMetadata": {"cveId": "CVE-2025-68208", "state": "PUBLISHED", "dateUpdated": "2026-10-15T22:02:47.833Z", "dateReserved": "2025-12-16T13:41:40.255Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-12-16T13:48:35.298Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/bpf/verifier.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "64b12dca2b0abcb5fc0542887d18b926ea5cf711", "status": "affected", "version": "ab470fefce2837e66b771c60858118d50bb5bb10", "versionType": "git"}, {"lessThan": "9944c7938cd5b3f37b0afec0481c7c015e4f1c58", "status": "affected", "version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "versionType": "git"}, {"lessThan": "57e04e2ff56e32f923154f0f7bc476fcb596ffe7", "status": "affected", "version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "versionType": "git"}, {"lessThan": "b0c8e6d3d866b6a7f73877f71968dbffd27b7785", "status": "affected", "version": "2793a8b015f7f1caadb9bce9c63dc659f7522676", "versionType": "git"}, {"lessThan": "6.6.117", "status": "affected", "version": "6.6.15", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/bpf/verifier.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"lessThan": "6.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.117", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.59", "versionType": "semver"}, {"lessThanOrEqual": "6.17.*", "status": "unaffected", "version": "6.17.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.18", "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: account for current allocated stack depth in widen_imprecise_scalars()\n\nThe usage pattern for widen_imprecise_scalars() looks as follows:\n\n prev_st = find_prev_entry(env, ...);\n queued_st = push_stack(...);\n widen_imprecise_scalars(env, prev_st, queued_st);\n\nWhere prev_st is an ancestor of the queued_st in the explored states\ntree. This ancestor is not guaranteed to have same allocated stack\ndepth as queued_st. E.g. in the following case:\n\n def main():\n for i in 1..2:\n foo(i) // same callsite, differnt param\n\n def foo(i):\n if i == 1:\n use 128 bytes of stack\n iterator based loop\n\nHere, for a second 'foo' call prev_st->allocated_stack is 128,\nwhile queued_st->allocated_stack is much smaller.\nwiden_imprecise_scalars() needs to take this into account and avoid\naccessing bpf_verifier_state->frame[*]->stack out of bounds."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbpf: tener en cuenta la profundidad actual de la pila asignada en widen_imprecise_scalars()\n\nEl patr\u00f3n de uso para widen_imprecise_scalars() es el siguiente:\n\n prev_st = find_prev_entry(env, ...);\n queued_st = push_stack(...);\n widen_imprecise_scalars(env, prev_st, queued_st);\n\nDonde prev_st es un ancestro de queued_st en el \u00e1rbol de estados explorados. No se garantiza que este ancestro tenga la misma profundidad de pila asignada que queued_st. Por ejemplo, en el siguiente caso:\n\n def main():\n for i in 1..2:\n foo(i) // mismo sitio de llamada, par\u00e1metro diferente\n\n def foo(i):\n if i == 1:\n usar 128 bytes de pila\n bucle basado en iterador\n\nAqu\u00ed, para una segunda llamada a 'foo', prev_st -> allocated_stack es 128, mientras que queued_st -> allocated_stack es mucho menor. widen_imprecise_scalars() necesita tener esto en cuenta y evitar acceder a bpf_verifier_state -> frame[*] -> stack fuera de los l\u00edmites."}], "id": "CVE-2025-68208", "lastModified": "2026-10-15T22:19:10.613", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-68208", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T22:00:14.254468Z", "version": "2.0.3"}}]}, "published": "2025-12-16T14:15:53.700", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/57e04e2ff56e32f923154f0f7bc476fcb596ffe7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64b12dca2b0abcb5fc0542887d18b926ea5cf711"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9944c7938cd5b3f37b0afec0481c7c015e4f1c58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b0c8e6d3d866b6a7f73877f71968dbffd27b7785"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: bpf: account for current allocated stack depth in widen_imprecise_scalars()", "id": "2422667", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2422667"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-68208", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68208\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68208\nhttps://lore.kernel.org/linux-cve-announce/2025121633-CVE-2025-68208-d2fc@gregkh/T"], "threat_severity": "Important"}

{}