{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52916", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.367Z", "datePublished": "2026-06-24T07:14:13.221Z", "dateUpdated": "2026-06-24T07:14:13.221Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T07:14:13.221Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/batman-adv/fragmentation.c"], "versions": [{"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "0c208fa3859e3a33a1c38bebc41d021166e94ac8", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "bcda4814dc6524283c0b958882cb963d75fe411d", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "aea54d0bbe156d5ab7d00d68f66149ff41f4612a", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "b54e459cf86943583c1aa2ee3081874e7ab1f5f3", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "5418be6c2e117bf8a316582795a8e3ff90f45e5d", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "5895ad21c7059a652da83fb817510f7a1e962abf", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "7138c35c9ad39a2fca6264af6b87466471f04ffc", "status": "affected", "versionType": "git"}, {"version": "610bfc6bc99bc83680d190ebc69359a05fc7f605", "lessThan": "bc62216dc8e221e3781afa14430f45208bfa9af9", "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/fragmentation.c"], "versions": [{"version": "3.13", "status": "affected"}, {"version": "0", "lessThan": "3.13", "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": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "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": "3.13", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.1"}]}]}], "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"}}}}

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