{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-39931", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.147Z", "datePublished": "2025-10-04T07:30:55.964Z", "dateUpdated": "2025-10-04T07:30:55.964Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-10-04T07:30:55.964Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af_alg - Set merge to zero early in af_alg_sendmsg\n\nIf an error causes af_alg_sendmsg to abort, ctx->merge may contain\na garbage value from the previous loop. This may then trigger a\ncrash on the next entry into af_alg_sendmsg when it attempts to do\na merge that can't be done.\n\nFix this by setting ctx->merge to zero near the start of the loop."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/af_alg.c"], "versions": [{"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "6241b9e2809b12da9130894cf5beddf088dc1b8a", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "2374c11189ef704a3e4863646369f1b8e6a27d71", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "24c1106504c625fabd3b7229611af617b4c27ac7", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "045ee26aa3920a47ec46d7fcb302420bf01fd753", "status": "affected", "versionType": "git"}, {"version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2", "lessThan": "9574b2330dbd2b5459b74d3b5e9619d39299fc6f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["crypto/af_alg.c"], "versions": [{"version": "2.6.38", "status": "affected"}, {"version": "0", "lessThan": "2.6.38", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.154", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.108", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.49", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.9", "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": "2.6.38", "versionEndExcluding": "6.1.154"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.6.108"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.12.49"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.16.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8a"}, {"url": "https://git.kernel.org/stable/c/2374c11189ef704a3e4863646369f1b8e6a27d71"}, {"url": "https://git.kernel.org/stable/c/24c1106504c625fabd3b7229611af617b4c27ac7"}, {"url": "https://git.kernel.org/stable/c/045ee26aa3920a47ec46d7fcb302420bf01fd753"}, {"url": "https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6f"}], "title": "crypto: af_alg - Set merge to zero early in af_alg_sendmsg", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af_alg - Set merge to zero early in af_alg_sendmsg\n\nIf an error causes af_alg_sendmsg to abort, ctx->merge may contain\na garbage value from the previous loop. This may then trigger a\ncrash on the next entry into af_alg_sendmsg when it attempts to do\na merge that can't be done.\n\nFix this by setting ctx->merge to zero near the start of the loop."}], "id": "CVE-2025-39931", "lastModified": "2025-10-06T14:56:47.823", "metrics": {}, "published": "2025-10-04T08:15:45.827", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/045ee26aa3920a47ec46d7fcb302420bf01fd753"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2374c11189ef704a3e4863646369f1b8e6a27d71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24c1106504c625fabd3b7229611af617b4c27ac7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: crypto: af_alg - Set merge to zero early in af_alg_sendmsg", "id": "2401423", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2401423"}, "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:\ncrypto: af_alg - Set merge to zero early in af_alg_sendmsg\nIf an error causes af_alg_sendmsg to abort, ctx->merge may contain\na garbage value from the previous loop. This may then trigger a\ncrash on the next entry into af_alg_sendmsg when it attempts to do\na merge that can't be done.\nFix this by setting ctx->merge to zero near the start of the loop."], "name": "CVE-2025-39931", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39931\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39931\nhttps://lore.kernel.org/linux-cve-announce/2025100416-CVE-2025-39931-8ff7@gregkh/T"], "threat_severity": "Moderate"}