{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80843",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.796Z",
        "datePublished": "2026-09-04T15:54:53.328Z",
        "dateUpdated": "2026-10-19T08:44:36.352Z"
    },
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                "dateUpdated": "2026-10-19T08:44:36.352Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix xfrm_state_construct() auth-trunc leak\n\nattach_auth_trunc() can allocate x->aalg while leaving\nx->props.aalgo at zero when the selected auth algorithm has no\nsadb_alg_id. One real case is cmac(aes).\n\nxfrm_state_construct() then treats !x->props.aalgo as \"no auth\nalgorithm attached yet\" and calls attach_auth(). That overwrites\nx->aalg and loses the first allocation. Any later failure or teardown\nonly frees the replacement pointer.\n\nCheck whether x->aalg is already attached instead of inferring that\nstate from x->props.aalgo."
                }
            ],
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                            "lessThan": "37426395cb90ef217beec8407a14bd82153793d3",
                            "status": "affected",
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                            "status": "affected",
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                    ]
                },
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                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/xfrm/xfrm_user.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.33",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.33",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.269",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.220",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.187",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.156",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.108",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.49",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.13",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.3",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/958ae9f261319e1cdc44879886bcda2263258cca"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fb7f3e74789a3c89647f4eb768f6dfaf4a751e72"
                },
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                    "url": "https://git.kernel.org/stable/c/ba0c110c205855b3f1e3130d8c0fdb484d704c8c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c8837bbe792257af547fd1c0252553ce13148795"
                },
                {
                    "url": "https://git.kernel.org/stable/c/71d42da01740ec6557837bebec0bc48cfc3b4c39"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cf67361e78dca488d6e4df8396a53e6745a3a80e"
                },
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                    "url": "https://git.kernel.org/stable/c/37426395cb90ef217beec8407a14bd82153793d3"
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                    "url": "https://git.kernel.org/stable/c/be19d20e53a239572bb2a28efcc1cd2b069b1ef9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c12cbf56320fb633484ee0ca1fb7d68d6b64b213"
                }
            ],
            "title": "xfrm: fix xfrm_state_construct() auth-trunc leak",
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}