{"api_version":"1","generated_at":"2026-07-03T18:50:06+00:00","cve":"CVE-2026-52934","urls":{"html":"https://cve.report/CVE-2026-52934","api":"https://cve.report/api/cve/CVE-2026-52934.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52934","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52934"},"summary":{"title":"batman-adv: tvlv: reject oversized TVLV packets","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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 08:16:23","updated_at":"2026-06-28 08:16:24"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","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","data":{"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","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","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","data":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/c02aa6c0c9d1bea9bb75dea362b75ad225137bae","name":"https://git.kernel.org/stable/c/c02aa6c0c9d1bea9bb75dea362b75ad225137bae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f50487e3566358b2b982b7801945e858c78ad9ab","name":"https://git.kernel.org/stable/c/f50487e3566358b2b982b7801945e858c78ad9ab","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6448a49344e87487b61bd88cb850cd694a0f576d","name":"https://git.kernel.org/stable/c/6448a49344e87487b61bd88cb850cd694a0f576d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/94db72e9dac202e017ee3db22c59d17e4f3bf171","name":"https://git.kernel.org/stable/c/94db72e9dac202e017ee3db22c59d17e4f3bf171","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/94a3d72cd9b21116d7c6d5bdc57c11401fc28557","name":"https://git.kernel.org/stable/c/94a3d72cd9b21116d7c6d5bdc57c11401fc28557","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/13493b00dd1e05a705981e052158652ea23eb482","name":"https://git.kernel.org/stable/c/13493b00dd1e05a705981e052158652ea23eb482","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1595628a2f877d052eda18865ccf539392c47c04","name":"https://git.kernel.org/stable/c/1595628a2f877d052eda18865ccf539392c47c04","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ede47988ac5687793745b17c1634a496a2299919","name":"https://git.kernel.org/stable/c/ede47988ac5687793745b17c1634a496a2299919","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52934","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52934","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ef26157747d42254453f6b3ac2bd8bd3c53339c3 c02aa6c0c9d1bea9bb75dea362b75ad225137bae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ef26157747d42254453f6b3ac2bd8bd3c53339c3 1595628a2f877d052eda18865ccf539392c47c04 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ef26157747d42254453f6b3ac2bd8bd3c53339c3 6448a49344e87487b61bd88cb850cd694a0f576d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ef26157747d42254453f6b3ac2bd8bd3c53339c3 13493b00dd1e05a705981e052158652ea23eb482 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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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."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-06-28T06:36:55.538Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c02aa6c0c9d1bea9bb75dea362b75ad225137bae"},{"url":"https://git.kernel.org/stable/c/1595628a2f877d052eda18865ccf539392c47c04"},{"url":"https://git.kernel.org/stable/c/6448a49344e87487b61bd88cb850cd694a0f576d"},{"url":"https://git.kernel.org/stable/c/13493b00dd1e05a705981e052158652ea23eb482"},{"url":"https://git.kernel.org/stable/c/94db72e9dac202e017ee3db22c59d17e4f3bf171"},{"url":"https://git.kernel.org/stable/c/ede47988ac5687793745b17c1634a496a2299919"},{"url":"https://git.kernel.org/stable/c/94a3d72cd9b21116d7c6d5bdc57c11401fc28557"},{"url":"https://git.kernel.org/stable/c/f50487e3566358b2b982b7801945e858c78ad9ab"}],"title":"batman-adv: tvlv: reject oversized TVLV packets","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52934","datePublished":"2026-06-24T07:14:25.321Z","dateReserved":"2026-06-09T07:44:35.369Z","dateUpdated":"2026-06-28T06:36:55.538Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 08:16:23","lastModifiedDate":"2026-06-28 08:16:24","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52934","Ordinal":"1","Title":"batman-adv: tvlv: reject oversized TVLV packets","CVE":"CVE-2026-52934","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52934","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"batman-adv: tvlv: reject oversized TVLV packets"}]}}}