{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-39917", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.147Z", "datePublished": "2025-10-01T07:44:39.423Z", "dateUpdated": "2026-01-14T17:52:47.721Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-10-01T07:44:39.423Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix out-of-bounds dynptr write in bpf_crypto_crypt\n\nStanislav reported that in bpf_crypto_crypt() the destination dynptr's\nsize is not validated to be at least as large as the source dynptr's\nsize before calling into the crypto backend with 'len = src_len'. This\ncan result in an OOB write when the destination is smaller than the\nsource.\n\nConcretely, in mentioned function, psrc and pdst are both linear\nbuffers fetched from each dynptr:\n\n psrc = __bpf_dynptr_data(src, src_len);\n [...]\n pdst = __bpf_dynptr_data_rw(dst, dst_len);\n [...]\n err = decrypt ?\n ctx->type->decrypt(ctx->tfm, psrc, pdst, src_len, piv) :\n ctx->type->encrypt(ctx->tfm, psrc, pdst, src_len, piv);\n\nThe crypto backend expects pdst to be large enough with a src_len length\nthat can be written. Add an additional src_len > dst_len check and bail\nout if it's the case. Note that these kfuncs are accessible under root\nprivileges only."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/bpf/crypto.c"], "versions": [{"version": "3e1c6f35409f9e447bf37f64840f5b65576bfb78", "lessThan": "0126358df12d6f476f79251d9c398ac5c1b3062d", "status": "affected", "versionType": "git"}, {"version": "3e1c6f35409f9e447bf37f64840f5b65576bfb78", "lessThan": "c4be24ef0510c146dca4671effb127e97631534b", "status": "affected", "versionType": "git"}, {"version": "3e1c6f35409f9e447bf37f64840f5b65576bfb78", "lessThan": "f9bb6ffa7f5ad0f8ee0f53fc4a10655872ee4a14", "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/crypto.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.48", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.8", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "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": "6.10", "versionEndExcluding": "6.12.48"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.16.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0126358df12d6f476f79251d9c398ac5c1b3062d"}, {"url": "https://git.kernel.org/stable/c/c4be24ef0510c146dca4671effb127e97631534b"}, {"url": "https://git.kernel.org/stable/c/f9bb6ffa7f5ad0f8ee0f53fc4a10655872ee4a14"}], "title": "bpf: Fix out-of-bounds dynptr write in bpf_crypto_crypt", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2025-39917", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-01-14T17:43:01.533146Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T17:52:47.721Z"}}]}}

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{"bugzilla": {"description": "kernel: bpf: Fix out-of-bounds dynptr write in bpf_crypto_crypt", "id": "2400604", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2400604"}, "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": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Fix out-of-bounds dynptr write in bpf_crypto_crypt\nStanislav reported that in bpf_crypto_crypt() the destination dynptr's\nsize is not validated to be at least as large as the source dynptr's\nsize before calling into the crypto backend with 'len = src_len'. This\ncan result in an OOB write when the destination is smaller than the\nsource.\nConcretely, in mentioned function, psrc and pdst are both linear\nbuffers fetched from each dynptr:\npsrc = __bpf_dynptr_data(src, src_len);\n[...]\npdst = __bpf_dynptr_data_rw(dst, dst_len);\n[...]\nerr = decrypt ?\nctx->type->decrypt(ctx->tfm, psrc, pdst, src_len, piv) :\nctx->type->encrypt(ctx->tfm, psrc, pdst, src_len, piv);\nThe crypto backend expects pdst to be large enough with a src_len length\nthat can be written. Add an additional src_len > dst_len check and bail\nout if it's the case. Note that these kfuncs are accessible under root\nprivileges only."], "name": "CVE-2025-39917", "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": "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:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39917\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39917\nhttps://lore.kernel.org/linux-cve-announce/2025100112-CVE-2025-39917-b3a9@gregkh/T"], "threat_severity": "Important"}