CVE-2025-37984

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-37984", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.976Z", "datePublished": "2025-05-20T17:09:18.321Z", "dateUpdated": "2026-10-15T21:52:05.648Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:58:45.966Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()\n\nHerbert notes that DIV_ROUND_UP() may overflow unnecessarily if an ecdsa\nimplementation's ->key_size() callback returns an unusually large value.\nHerbert instead suggests (for a division by 8):\n\n X / 8 + !!(X & 7)\n\nBased on this formula, introduce a generic DIV_ROUND_UP_POW2() macro and\nuse it in lieu of DIV_ROUND_UP() for ->key_size() return values.\n\nAdditionally, use the macro in ecc_digits_from_bytes(), whose \"nbytes\"\nparameter is a ->key_size() return value in some instances, or a\nuser-specified ASN.1 length in the case of ecdsa_get_signature_rs()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The affected code is the in-kernel ECDSA signature-verification path, entered from userspace via `add_key(\"asymmetric\", ...)`/`keyctl(KEYCTL_PKEY_VERIFY)` or local X.509/PKCS#7 verification. No in-kernel network consumer (ksmbd, nfsd, TLS, Bluetooth) performs ECDSA certificate verification, so the flaw is only reachable through local syscalls.\nAC:H - The `DIV_ROUND_UP()` wrap requires a value above `UINT_MAX - 7`, but every in-tree caller bounds its input \u2014 `ecdsa_get_signature_rs()` rejects `vlen > ndigits*8 + 1`, the ASN.1 decoder caps `vlen` at the buffer length, and `ecdsa_key_size()` is fixed at \u226466 bytes by the curve's `nbits`. Triggering it depends on an ECDSA implementation whose `->key_size()` callback reports an ~4 GB key, a precondition entirely outside the attacker's control and absent from any standard configuration.\nPR:L - The verification path is reachable by any unprivileged local user, who may add a crafted self-signed X.509 certificate to their own session keyring and then submit arbitrary signature blobs via `KEYCTL_PKEY_VERIFY`; no capability or namespace privilege is required.\nUI:N - The attacker drives the entire sequence through its own `add_key`/`keyctl` syscalls with attacker-supplied key and signature data; no victim action or cooperating process is needed.\nS:U - The resulting corruption is confined to kernel memory within the same kernel that runs the flawed code; no VM, hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - An underflowed `ndigits` sends `ecc_swap_digits()` iterating up to `0xFFFFFFFF` digits, reading and writing far outside the `ecdsa_raw_sig`/`pub_key` buffers, and the converted digits feed back into signature verification \u2014 an unbounded out-of-bounds access that could expose adjacent kernel memory.\nI:H - `out[--ndigits]` with `ndigits` wrapping to `0xFFFFFFFF` is a wild store roughly 32 GB past the destination buffer, followed by a multi-billion-iteration out-of-bounds write loop \u2014 an out-of-bounds write primitive that scores High.\nA:H - The runaway `ecc_swap_digits()` loop writes over arbitrary kernel memory and will immediately fault or panic the machine, and the corrupted crypto state renders the affected path unusable."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/ecc.c", "crypto/ecdsa-p1363.c", "crypto/ecdsa-x962.c", "include/linux/math.h"], "versions": [{"version": "55779f26eab9af12474a447001bd17070f055712", "lessThan": "f02f0218be412cff1c844addf58e002071be298b", "status": "affected", "versionType": "git"}, {"version": "c6ab5c915da460c0397960af3c308386c3f3247b", "lessThan": "f2133b849ff273abddb6da622daddd8f6f6fa448", "status": "affected", "versionType": "git"}, {"version": "c6ab5c915da460c0397960af3c308386c3f3247b", "lessThan": "921b8167f10708e38080f84e195cdc68a7a561f1", "status": "affected", "versionType": "git"}, {"version": "c6ab5c915da460c0397960af3c308386c3f3247b", "lessThan": "b16510a530d1e6ab9683f04f8fb34f2e0f538275", "status": "affected", "versionType": "git"}, {"version": "6.6.70", "lessThan": "6.6.99", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/ecc.c", "crypto/ecdsa-p1363.c", "crypto/ecdsa-x962.c", "include/linux/math.h"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.99", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.39", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14.5", "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": "6.6.70", "versionEndExcluding": "6.6.99"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.12.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.14.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.15"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f02f0218be412cff1c844addf58e002071be298b"}, {"url": "https://git.kernel.org/stable/c/f2133b849ff273abddb6da622daddd8f6f6fa448"}, {"url": "https://git.kernel.org/stable/c/921b8167f10708e38080f84e195cdc68a7a561f1"}, {"url": "https://git.kernel.org/stable/c/b16510a530d1e6ab9683f04f8fb34f2e0f538275"}], "title": "crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-37984", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:46:35.354551Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:52:05.648Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-37984", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:46:35.354551Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:46:35.823Z"}}], "cna": {"title": "crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The affected code is the in-kernel ECDSA signature-verification path, entered from userspace via `add_key(\"asymmetric\", ...)`/`keyctl(KEYCTL_PKEY_VERIFY)` or local X.509/PKCS#7 verification. No in-kernel network consumer (ksmbd, nfsd, TLS, Bluetooth) performs ECDSA certificate verification, so the flaw is only reachable through local syscalls.\nAC:H - The `DIV_ROUND_UP()` wrap requires a value above `UINT_MAX - 7`, but every in-tree caller bounds its input \u2014 `ecdsa_get_signature_rs()` rejects `vlen > ndigits*8 + 1`, the ASN.1 decoder caps `vlen` at the buffer length, and `ecdsa_key_size()` is fixed at \u226466 bytes by the curve's `nbits`. Triggering it depends on an ECDSA implementation whose `->key_size()` callback reports an ~4 GB key, a precondition entirely outside the attacker's control and absent from any standard configuration.\nPR:L - The verification path is reachable by any unprivileged local user, who may add a crafted self-signed X.509 certificate to their own session keyring and then submit arbitrary signature blobs via `KEYCTL_PKEY_VERIFY`; no capability or namespace privilege is required.\nUI:N - The attacker drives the entire sequence through its own `add_key`/`keyctl` syscalls with attacker-supplied key and signature data; no victim action or cooperating process is needed.\nS:U - The resulting corruption is confined to kernel memory within the same kernel that runs the flawed code; no VM, hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - An underflowed `ndigits` sends `ecc_swap_digits()` iterating up to `0xFFFFFFFF` digits, reading and writing far outside the `ecdsa_raw_sig`/`pub_key` buffers, and the converted digits feed back into signature verification \u2014 an unbounded out-of-bounds access that could expose adjacent kernel memory.\nI:H - `out[--ndigits]` with `ndigits` wrapping to `0xFFFFFFFF` is a wild store roughly 32 GB past the destination buffer, followed by a multi-billion-iteration out-of-bounds write loop \u2014 an out-of-bounds write primitive that scores High.\nA:H - The runaway `ecc_swap_digits()` loop writes over arbitrary kernel memory and will immediately fault or panic the machine, and the corrupted crypto state renders the affected path unusable."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "55779f26eab9af12474a447001bd17070f055712", "lessThan": "f02f0218be412cff1c844addf58e002071be298b", "versionType": "git"}, {"status": "affected", "version": "c6ab5c915da460c0397960af3c308386c3f3247b", "lessThan": "f2133b849ff273abddb6da622daddd8f6f6fa448", "versionType": "git"}, {"status": "affected", "version": "c6ab5c915da460c0397960af3c308386c3f3247b", "lessThan": "921b8167f10708e38080f84e195cdc68a7a561f1", "versionType": "git"}, {"status": "affected", "version": "c6ab5c915da460c0397960af3c308386c3f3247b", "lessThan": "b16510a530d1e6ab9683f04f8fb34f2e0f538275", "versionType": "git"}, {"status": "affected", "version": "6.6.70", "lessThan": "6.6.99", "versionType": "semver"}], "programFiles": ["crypto/ecc.c", "crypto/ecdsa-p1363.c", "crypto/ecdsa-x962.c", "include/linux/math.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"status": "unaffected", "version": "0", "lessThan": "6.10", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.99", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.39", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.14.5", "versionType": "semver", "lessThanOrEqual": "6.14.*"}, {"status": "unaffected", "version": "6.15", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["crypto/ecc.c", "crypto/ecdsa-p1363.c", "crypto/ecdsa-x962.c", "include/linux/math.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/f02f0218be412cff1c844addf58e002071be298b"}, {"url": "https://git.kernel.org/stable/c/f2133b849ff273abddb6da622daddd8f6f6fa448"}, {"url": "https://git.kernel.org/stable/c/921b8167f10708e38080f84e195cdc68a7a561f1"}, {"url": "https://git.kernel.org/stable/c/b16510a530d1e6ab9683f04f8fb34f2e0f538275"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()\n\nHerbert notes that DIV_ROUND_UP() may overflow unnecessarily if an ecdsa\nimplementation's ->key_size() callback returns an unusually large value.\nHerbert instead suggests (for a division by 8):\n\n X / 8 + !!(X & 7)\n\nBased on this formula, introduce a generic DIV_ROUND_UP_POW2() macro and\nuse it in lieu of DIV_ROUND_UP() for ->key_size() return values.\n\nAdditionally, use the macro in ecc_digits_from_bytes(), whose \"nbytes\"\nparameter is a ->key_size() return value in some instances, or a\nuser-specified ASN.1 length in the case of ecdsa_get_signature_rs()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.99", "versionStartIncluding": "6.6.70"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.39", "versionStartIncluding": "6.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.14.5", "versionStartIncluding": "6.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.15", "versionStartIncluding": "6.10"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:58:45.966Z"}}}, "cveMetadata": {"cveId": "CVE-2025-37984", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:52:05.648Z", "dateReserved": "2025-04-16T04:51:23.976Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-05-20T17:09:18.321Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["crypto/ecc.c", "crypto/ecdsa-p1363.c", "crypto/ecdsa-x962.c", "include/linux/math.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f02f0218be412cff1c844addf58e002071be298b", "status": "affected", "version": "55779f26eab9af12474a447001bd17070f055712", "versionType": "git"}, {"lessThan": "f2133b849ff273abddb6da622daddd8f6f6fa448", "status": "affected", "version": "c6ab5c915da460c0397960af3c308386c3f3247b", "versionType": "git"}, {"lessThan": "921b8167f10708e38080f84e195cdc68a7a561f1", "status": "affected", "version": "c6ab5c915da460c0397960af3c308386c3f3247b", "versionType": "git"}, {"lessThan": "b16510a530d1e6ab9683f04f8fb34f2e0f538275", "status": "affected", "version": "c6ab5c915da460c0397960af3c308386c3f3247b", "versionType": "git"}, {"lessThan": "6.6.99", "status": "affected", "version": "6.6.70", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["crypto/ecc.c", "crypto/ecdsa-p1363.c", "crypto/ecdsa-x962.c", "include/linux/math.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"lessThan": "6.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.99", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.39", "versionType": "semver"}, {"lessThanOrEqual": "6.14.*", "status": "unaffected", "version": "6.14.5", "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": "7CCA2E29-450F-44AE-B634-FCC3BAF6D1F3", "versionEndExcluding": "6.6.99", "versionStartIncluding": "6.6.70", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5E0A7E52-CDBF-45E4-8338-F679910D5C1B", "versionEndExcluding": "6.12.39", "versionStartIncluding": "6.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6B25CA7E-4CD0-46DB-B4EF-13A3516071FB", "versionEndExcluding": "6.14.5", "versionStartIncluding": "6.13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()\n\nHerbert notes that DIV_ROUND_UP() may overflow unnecessarily if an ecdsa\nimplementation's ->key_size() callback returns an unusually large value.\nHerbert instead suggests (for a division by 8):\n\n X / 8 + !!(X & 7)\n\nBased on this formula, introduce a generic DIV_ROUND_UP_POW2() macro and\nuse it in lieu of DIV_ROUND_UP() for ->key_size() return values.\n\nAdditionally, use the macro in ecc_digits_from_bytes(), whose \"nbytes\"\nparameter is a ->key_size() return value in some instances, or a\nuser-specified ASN.1 length in the case of ecdsa_get_signature_rs()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: crypto: ecdsa - Protecci\u00f3n contra desbordamientos de enteros en DIV_ROUND_UP(). Herbert se\u00f1ala que DIV_ROUND_UP() puede desbordarse innecesariamente si la funci\u00f3n de retorno ->key_size() de una implementaci\u00f3n de ecdsa devuelve un valor inusualmente grande. En su lugar, Herbert sugiere (para una divisi\u00f3n entre 8): X / 8 + !!(X y 7). Con base en esta f\u00f3rmula, introduzca una macro gen\u00e9rica DIV_ROUND_UP_POW2() y \u00fasela en lugar de DIV_ROUND_UP() para los valores de retorno de ->key_size(). Adem\u00e1s, utilice la macro en ecc_digits_from_bytes(), cuyo par\u00e1metro \"nbytes\" es un valor de retorno de ->key_size() en algunos casos, o una longitud ASN.1 especificada por el usuario en el caso de ecdsa_get_signature_rs()."}], "id": "CVE-2025-37984", "lastModified": "2026-10-15T22:18:23.410", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-37984", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:46:35.354551Z", "version": "2.0.3"}}]}, "published": "2025-05-20T18:15:45.253", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/921b8167f10708e38080f84e195cdc68a7a561f1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b16510a530d1e6ab9683f04f8fb34f2e0f538275"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f02f0218be412cff1c844addf58e002071be298b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2133b849ff273abddb6da622daddd8f6f6fa448"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: crypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()", "id": "2367604", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2367604"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncrypto: ecdsa - Harden against integer overflows in DIV_ROUND_UP()\nHerbert notes that DIV_ROUND_UP() may overflow unnecessarily if an ecdsa\nimplementation's ->key_size() callback returns an unusually large value.\nHerbert instead suggests (for a division by 8):\nX / 8 + !!(X & 7)\nBased on this formula, introduce a generic DIV_ROUND_UP_POW2() macro and\nuse it in lieu of DIV_ROUND_UP() for ->key_size() return values.\nAdditionally, use the macro in ecc_digits_from_bytes(), whose \"nbytes\"\nparameter is a ->key_size() return value in some instances, or a\nuser-specified ASN.1 length in the case of ecdsa_get_signature_rs()."], "name": "CVE-2025-37984", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-37984\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-37984\nhttps://lore.kernel.org/linux-cve-announce/2025052037-CVE-2025-37984-be4c@gregkh/T"], "statement": "A hardening patch was introduced in the Linux kernel ECDSA implementation to mitigate potential integer overflows in size calculations using DIV_ROUND_UP(). The fix replaces it with a safer macro, DIV_ROUND_UP_POW2(), specifically designed for power-of-two divisions and preventing wraparound when key_size() returns large values. This prevents potential memory corruption issues in the ECDSA verification logic.", "threat_severity": "Low"}

{"created": "2025-06-24T09:44:22.961960+00:00", "updated": "2025-06-24T09:44:22.962026+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}