{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-46198", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.104Z", "datePublished": "2026-05-28T09:40:14.558Z", "dateUpdated": "2026-08-05T12:30:22.970Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:30:22.970Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix integer overflow on buff_pos\n\nFixing an integer overflow present in batadv_iv_ogm_send_to_if. The size\ncheck is done using the int type in batadv_iv_ogm_aggr_packet whereas the\nbuff_pos variable uses the s16 type. This could lead to an out-of-bound\nread." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - batman-adv OGMs are layer-2 mesh management frames received from neighboring mesh nodes; they are not IP-routable, so an attacker must be on the same mesh/L2 (WiFi/Ethernet) segment.\nAC:L - The attacker fully controls the crafted OGM's size and tvlv_len, and in a mesh deployed over a large-MTU interface (required for packet_len>32767) can reliably and repeatedly trigger the overflow; the negative-offset check passes for nearly all values.\nPR:N - batman-adv performs no authentication of OGMs; any node on the mesh can broadcast frames that the victim node automatically processes and forwards.\nUI:N - Received OGMs are parsed, forwarded and aggregated entirely by the kernel without any user action.\nS:U - The out-of-bounds read/write corrupts kernel memory within the same kernel security authority; no boundary (VM/IOMMU) is crossed.\nC:H - The wrapped negative buff_pos causes reads of kernel memory before/around the skb buffer (tvlv_len and OGM fields), an out-of-bounds read of attacker-influenced kernel memory.\nI:H - The loop body writes ogm->flags (set/clear BATADV_DIRECTLINK) at an attacker-influenced negative offset from skb->data, an out-of-bounds write giving a memory-corruption primitive.\nA:H - Continued iteration over wild pointers dereferences out-of-bounds/unmapped memory, reliably causing a kernel oops/panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/batman-adv/bat_iv_ogm.c" ], "versions": [ { "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "867cd090760e8f5cd206f387b47ff9c56fac04e9", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "10bb1f366d884d506c38a947b43026a75d1afe9a", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "96c9c0ed9a9579a9085765aceaa4556a6666eb82", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "f61499359fa529f0d45a53bf7c573a49eb6322e6", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "974542d1efc48b7e9fe16184e647615cba39969b", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "bf872db54f91ffe70104b98c20068b2d5910e018", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "b252797bfced986d6d92ec2f4cfcca842ce8aa78", "status": "affected", "versionType": "git" }, { "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3", "lessThan": "0799e5943611006b346b8813c7daf7dd5aa26bfd", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/batman-adv/bat_iv_ogm.c" ], "versions": [ { "version": "2.6.38", "status": "affected" }, { "version": "0", "lessThan": "2.6.38", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.90", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.32", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.9", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.6.140" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.12.90" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.18.32" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "7.0.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/867cd090760e8f5cd206f387b47ff9c56fac04e9" }, { "url": "https://git.kernel.org/stable/c/10bb1f366d884d506c38a947b43026a75d1afe9a" }, { "url": "https://git.kernel.org/stable/c/96c9c0ed9a9579a9085765aceaa4556a6666eb82" }, { "url": "https://git.kernel.org/stable/c/f61499359fa529f0d45a53bf7c573a49eb6322e6" }, { "url": "https://git.kernel.org/stable/c/974542d1efc48b7e9fe16184e647615cba39969b" }, { "url": "https://git.kernel.org/stable/c/bf872db54f91ffe70104b98c20068b2d5910e018" }, { "url": "https://git.kernel.org/stable/c/b252797bfced986d6d92ec2f4cfcca842ce8aa78" }, { "url": "https://git.kernel.org/stable/c/0799e5943611006b346b8813c7daf7dd5aa26bfd" } ], "title": "batman-adv: fix integer overflow on buff_pos", "x_generator": { "engine": "bippy-1.2.0" } } } }