{"api_version":"1","generated_at":"2026-06-26T04:52:32+00:00","cve":"CVE-2026-52916","urls":{"html":"https://cve.report/CVE-2026-52916","api":"https://cve.report/api/cve/CVE-2026-52916.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52916","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52916"},"summary":{"title":"batman-adv: frag: disallow unicast fragment in fragment","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: frag: disallow unicast fragment in fragment\n\nbatadv_frag_skb_buffer() is called by batadv_batman_skb_recv() when a\nBATADV_UNICAST_FRAG packet is received. Once all fragments are collected\nand the packet is reassembled, batadv_recv_frag_packet() calls\nbatadv_batman_skb_recv() again to process the defragmented payload.\n\nA malicious sender can craft a BATADV_UNICAST_FRAG packet whose reassembled\npayload is itself a BATADV_UNICAST_FRAG packet (matryoshka-style nesting).\nEach nesting level recurses through batadv_batman_skb_recv() without bound,\ngrowing the kernel stack until it is exhausted.\n\nSince refragmentation or fragments in fragments are not actually allowed,\ndiscard all packets which are still BATADV_UNICAST_FRAG packets after the\ndefragmentation process.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 08:16:21","updated_at":"2026-06-24 08:16:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/bc62216dc8e221e3781afa14430f45208bfa9af9","name":"https://git.kernel.org/stable/c/bc62216dc8e221e3781afa14430f45208bfa9af9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5418be6c2e117bf8a316582795a8e3ff90f45e5d","name":"https://git.kernel.org/stable/c/5418be6c2e117bf8a316582795a8e3ff90f45e5d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7138c35c9ad39a2fca6264af6b87466471f04ffc","name":"https://git.kernel.org/stable/c/7138c35c9ad39a2fca6264af6b87466471f04ffc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bcda4814dc6524283c0b958882cb963d75fe411d","name":"https://git.kernel.org/stable/c/bcda4814dc6524283c0b958882cb963d75fe411d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5895ad21c7059a652da83fb817510f7a1e962abf","name":"https://git.kernel.org/stable/c/5895ad21c7059a652da83fb817510f7a1e962abf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aea54d0bbe156d5ab7d00d68f66149ff41f4612a","name":"https://git.kernel.org/stable/c/aea54d0bbe156d5ab7d00d68f66149ff41f4612a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b54e459cf86943583c1aa2ee3081874e7ab1f5f3","name":"https://git.kernel.org/stable/c/b54e459cf86943583c1aa2ee3081874e7ab1f5f3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0c208fa3859e3a33a1c38bebc41d021166e94ac8","name":"https://git.kernel.org/stable/c/0c208fa3859e3a33a1c38bebc41d021166e94ac8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52916","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52916","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 0c208fa3859e3a33a1c38bebc41d021166e94ac8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 bcda4814dc6524283c0b958882cb963d75fe411d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 aea54d0bbe156d5ab7d00d68f66149ff41f4612a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 b54e459cf86943583c1aa2ee3081874e7ab1f5f3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 5418be6c2e117bf8a316582795a8e3ff90f45e5d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 5895ad21c7059a652da83fb817510f7a1e962abf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 7138c35c9ad39a2fca6264af6b87466471f04ffc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 610bfc6bc99bc83680d190ebc69359a05fc7f605 bc62216dc8e221e3781afa14430f45208bfa9af9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.258 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.209 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.142 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.92 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"52916","cve":"CVE-2026-52916","epss":"0.001770000","percentile":"0.074310000","score_date":"2026-06-25","updated_at":"2026-06-26 00:06:15"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/batman-adv/fragmentation.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0c208fa3859e3a33a1c38bebc41d021166e94ac8","status":"affected","version":"610bfc6bc99bc83680d190ebc69359a05fc7f605","versionType":"git"},{"lessThan":"bcda4814dc6524283c0b958882cb963d75fe411d","status":"affected","version":"610bfc6bc99bc83680d190ebc69359a05fc7f605","versionType":"git"},{"lessThan":"aea54d0bbe156d5ab7d00d68f66149ff41f4612a","status":"affected","version":"610bfc6bc99bc83680d190ebc69359a05fc7f605","versionType":"git"},{"lessThan":"b54e459cf86943583c1aa2ee3081874e7ab1f5f3","status":"affected","version":"610bfc6bc99bc83680d190ebc69359a05fc7f605","versionType":"git"},{"lessThan":"5418be6c2e117bf8a316582795a8e3ff90f45e5d","status":"affected","version":"610bfc6bc99bc83680d190ebc69359a05fc7f605","versionType":"git"},{"lessThan":"5895ad21c7059a652da83fb817510f7a1e962abf","status":"affected","version":"610bfc6bc99bc83680d190ebc69359a05fc7f605","versionType":"git"},{"lessThan":"7138c35c9ad39a2fca6264af6b87466471f04ffc","status":"affected","version":"610bfc6bc99bc83680d190ebc69359a05fc7f605","versionType":"git"},{"lessThan":"bc62216dc8e221e3781afa14430f45208bfa9af9","status":"affected","version":"610bfc6bc99bc83680d190ebc69359a05fc7f605","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/batman-adv/fragmentation.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.13"},{"lessThan":"3.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.142","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.258","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.209","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.142","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"3.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: frag: disallow unicast fragment in fragment\n\nbatadv_frag_skb_buffer() is called by batadv_batman_skb_recv() when a\nBATADV_UNICAST_FRAG packet is received. Once all fragments are collected\nand the packet is reassembled, batadv_recv_frag_packet() calls\nbatadv_batman_skb_recv() again to process the defragmented payload.\n\nA malicious sender can craft a BATADV_UNICAST_FRAG packet whose reassembled\npayload is itself a BATADV_UNICAST_FRAG packet (matryoshka-style nesting).\nEach nesting level recurses through batadv_batman_skb_recv() without bound,\ngrowing the kernel stack until it is exhausted.\n\nSince refragmentation or fragments in fragments are not actually allowed,\ndiscard all packets which are still BATADV_UNICAST_FRAG packets after the\ndefragmentation process."}],"providerMetadata":{"dateUpdated":"2026-06-24T07:14:13.221Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0c208fa3859e3a33a1c38bebc41d021166e94ac8"},{"url":"https://git.kernel.org/stable/c/bcda4814dc6524283c0b958882cb963d75fe411d"},{"url":"https://git.kernel.org/stable/c/aea54d0bbe156d5ab7d00d68f66149ff41f4612a"},{"url":"https://git.kernel.org/stable/c/b54e459cf86943583c1aa2ee3081874e7ab1f5f3"},{"url":"https://git.kernel.org/stable/c/5418be6c2e117bf8a316582795a8e3ff90f45e5d"},{"url":"https://git.kernel.org/stable/c/5895ad21c7059a652da83fb817510f7a1e962abf"},{"url":"https://git.kernel.org/stable/c/7138c35c9ad39a2fca6264af6b87466471f04ffc"},{"url":"https://git.kernel.org/stable/c/bc62216dc8e221e3781afa14430f45208bfa9af9"}],"title":"batman-adv: frag: disallow unicast fragment in fragment","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52916","datePublished":"2026-06-24T07:14:13.221Z","dateReserved":"2026-06-09T07:44:35.367Z","dateUpdated":"2026-06-24T07:14:13.221Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 08:16:21","lastModifiedDate":"2026-06-24 08:16:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52916","Ordinal":"1","Title":"batman-adv: frag: disallow unicast fragment in fragment","CVE":"CVE-2026-52916","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52916","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: frag: disallow unicast fragment in fragment\n\nbatadv_frag_skb_buffer() is called by batadv_batman_skb_recv() when a\nBATADV_UNICAST_FRAG packet is received. Once all fragments are collected\nand the packet is reassembled, batadv_recv_frag_packet() calls\nbatadv_batman_skb_recv() again to process the defragmented payload.\n\nA malicious sender can craft a BATADV_UNICAST_FRAG packet whose reassembled\npayload is itself a BATADV_UNICAST_FRAG packet (matryoshka-style nesting).\nEach nesting level recurses through batadv_batman_skb_recv() without bound,\ngrowing the kernel stack until it is exhausted.\n\nSince refragmentation or fragments in fragments are not actually allowed,\ndiscard all packets which are still BATADV_UNICAST_FRAG packets after the\ndefragmentation process.","Type":"Description","Title":"batman-adv: frag: disallow unicast fragment in fragment"}]}}}