batman-adv: tvlv: reject oversized TVLV packets_CVE-2026-52934

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tvlv: reject oversized TVLV packets\n\nbatadv_tvlv_container_ogm_append() builds a TVLV packet section from\nthe tvlv.container_list. The total size of this section is computed by\nbatadv_tvlv_container_list_size(), which sums the sizes of all registered\ncontainers.\n\nThe return type and accumulator in batadv_tvlv_container_list_size() were\nu16. If the accumulated size exceeds U16_MAX, the value wraps around,\ncausing the subsequent allocation in batadv_tvlv_container_ogm_append()\nto be undersized. The memcpy-style copy that follows would then write\nbeyond the end of the allocated buffer, corrupting kernel memory.\n\nFix this by widening the return type of batadv_tvlv_container_list_size()\nto size_t. In batadv_tvlv_container_ogm_append(), check the computed length\nagainst U16_MAX before proceeding, and bail out as if the allocation had\nfailed when the limit is exceeded.",
    "published": "2026-06-24T07:14:25.321Z",
    "modified": "2026-06-28T06:36:55.538Z",
    "type": "cve",
    "title": "batman-adv: tvlv: reject oversized TVLV packets",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/c02aa6c0c9d1bea9bb75dea362b75ad225137bae\nhttps://git.kernel.org/stable/c/1595628a2f877d052eda18865ccf539392c47c04\nhttps://git.kernel.org/stable/c/6448a49344e87487b61bd88cb850cd694a0f576d\nhttps://git.kernel.org/stable/c/13493b00dd1e05a705981e052158652ea23eb482\nhttps://git.kernel.org/stable/c/94db72e9dac202e017ee3db22c59d17e4f3bf171\nhttps://git.kernel.org/stable/c/ede47988ac5687793745b17c1634a496a2299919\nhttps://git.kernel.org/stable/c/94a3d72cd9b21116d7c6d5bdc57c11401fc28557\nhttps://git.kernel.org/stable/c/f50487e3566358b2b982b7801945e858c78ad9ab",
    "id": "CVE-2026-52934",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3\nLinux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3\nLinux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3\nLinux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3\nLinux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3\nLinux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3\nLinux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3\nLinux Linux ef26157747d42254453f6b3ac2bd8bd3c53339c3\nLinux Linux 3.13",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "ef26157747d42254453f6b3ac2bd8bd3c53339c3",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}