{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-39789",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.131Z",
        "datePublished": "2025-09-11T16:56:37.912Z",
        "dateUpdated": "2026-08-05T12:05:09.715Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:05:09.715Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: x86/aegis - Add missing error checks\n\nThe skcipher_walk functions can allocate memory and can fail, so\nchecking for errors is necessary."
                }
            ],
            "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:L",
                        "baseScore": 7.3,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The AEGIS-128 AEAD is driven from the local crypto API — an unprivileged user reaches it directly via an AF_ALG/algif_aead socket, and in-kernel consumers (dm-crypt, xfrm ESP) are configured locally. A remote peer cannot itself supply input that reaches the failing allocation, so this is local.\nAC:L - The failure requires a memory allocation failure inside skcipher_walk, but the attacker can both force the allocating slow path on every walk step (by submitting scatterlists fragmented below the 16-byte chunksize) and induce the memory pressure, then retry the operation arbitrarily many times; the GFP_ATOMIC variant used by softirq consumers fails readily under attacker-generated load.\nPR:L - Binding an AF_ALG socket to \"aegis128\" and issuing encrypt requests requires only an unprivileged local account — no capability, and module autoload happens on the user's behalf.\nUI:N - The attacker triggers the encrypt/decrypt path entirely on their own; no victim action is needed.\nS:U - The faulty error handling and its consequences stay within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - On the unchecked error path the encrypt call returns success without encrypting, so the \"ciphertext\" handed to the caller is the raw plaintext (in-place operations) or stale kernel buffer contents (out-of-place, e.g. dm-crypt/ESP buffers), disclosing data that was supposed to be protected to disk, network peers, or backups.\nI:H - The kernel reports a successful AEAD operation while producing unencrypted, partially encrypted, or stale output with a mismatched tag, so data written to encrypted storage or an encrypted tunnel is silently wrong and cannot be distinguished from valid output by the caller.\nA:L - No kernel crash, hang, or corruption occurs; the impact is that the silently bad ciphertext/tag causes downstream rejection — dropped IPsec packets, I/O errors on integrity-protected volumes, and unrecoverable stored blocks — which is a limited interruption rather than a full loss of availability."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/crypto/aegis128-aesni-glue.c"
                    ],
                    "versions": [
                        {
                            "version": "1d373d4e8e15b358f08de52956b32e0e38a11f84",
                            "lessThan": "475104178f4d30e749ee4f5473c87f692b93bebb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d373d4e8e15b358f08de52956b32e0e38a11f84",
                            "lessThan": "3d9eb180fbe8828cce43bce4c370124685b205c3",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/crypto/aegis128-aesni-glue.c"
                    ],
                    "versions": [
                        {
                            "version": "4.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16.4",
                            "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": "4.18",
                                    "versionEndExcluding": "6.16.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.18",
                                    "versionEndExcluding": "6.17"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/475104178f4d30e749ee4f5473c87f692b93bebb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3d9eb180fbe8828cce43bce4c370124685b205c3"
                }
            ],
            "title": "crypto: x86/aegis - Add missing error checks",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}