{"api_version":"1","generated_at":"2026-05-28T16:30:03+00:00","cve":"CVE-2026-46238","urls":{"html":"https://cve.report/CVE-2026-46238","api":"https://cve.report/api/cve/CVE-2026-46238.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46238","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46238"},"summary":{"title":"batman-adv: stop caching unowned originator pointers in BAT IV","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: stop caching unowned originator pointers in BAT IV\n\nBAT IV keeps the last-hop neighbor address in each neigh_node, but some\npaths also cache an originator pointer derived from a temporary lookup.\nThat pointer is not owned by the neigh_node and may no longer refer to a\nlive originator entry after purge handling runs.\n\nStop storing the auxiliary originator pointer in the BAT IV neighbor\nstate. When BAT IV needs the neighbor originator data, resolve it from\nthe stored neighbor address and drop the reference again after use.\n\n[sven: avoid bonding logic for outgoing OGM]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-28 10:16:39","updated_at":"2026-05-28 13:44:01"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006","name":"https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620","name":"https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38","name":"https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110","name":"https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af","name":"https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46238","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46238","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 aafcbaf1159ea224528ca4075d0ba8c10ef374af git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 6e20700f8c524ac379ba8274ff5d453023b7c006 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 09dc0d1a12222ffca6481916eab3cfea477b9620 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 67bceeb22207f1f5a402973a3a0809e5f2698f38 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 f03e8583532941b07761c5429de7d50766fa3110 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.38","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.38 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.140 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.90 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.32 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.9 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/batman-adv/bat_iv_ogm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"aafcbaf1159ea224528ca4075d0ba8c10ef374af","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"6e20700f8c524ac379ba8274ff5d453023b7c006","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"09dc0d1a12222ffca6481916eab3cfea477b9620","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"67bceeb22207f1f5a402973a3a0809e5f2698f38","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"},{"lessThan":"f03e8583532941b07761c5429de7d50766fa3110","status":"affected","version":"c6c8fea29769d998d94fcec9b9f14d4b52b349d3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/batman-adv/bat_iv_ogm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.38"},{"lessThan":"2.6.38","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.90","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.32","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.140","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.90","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.32","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.9","versionStartIncluding":"2.6.38","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc4","versionStartIncluding":"2.6.38","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: stop caching unowned originator pointers in BAT IV\n\nBAT IV keeps the last-hop neighbor address in each neigh_node, but some\npaths also cache an originator pointer derived from a temporary lookup.\nThat pointer is not owned by the neigh_node and may no longer refer to a\nlive originator entry after purge handling runs.\n\nStop storing the auxiliary originator pointer in the BAT IV neighbor\nstate. When BAT IV needs the neighbor originator data, resolve it from\nthe stored neighbor address and drop the reference again after use.\n\n[sven: avoid bonding logic for outgoing OGM]"}],"providerMetadata":{"dateUpdated":"2026-05-28T09:41:06.816Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af"},{"url":"https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006"},{"url":"https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620"},{"url":"https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38"},{"url":"https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110"}],"title":"batman-adv: stop caching unowned originator pointers in BAT IV","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46238","datePublished":"2026-05-28T09:41:06.816Z","dateReserved":"2026-05-13T15:03:33.107Z","dateUpdated":"2026-05-28T09:41:06.816Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-28 10:16:39","lastModifiedDate":"2026-05-28 13:44:01","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46238","Ordinal":"1","Title":"batman-adv: stop caching unowned originator pointers in BAT IV","CVE":"CVE-2026-46238","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46238","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: stop caching unowned originator pointers in BAT IV\n\nBAT IV keeps the last-hop neighbor address in each neigh_node, but some\npaths also cache an originator pointer derived from a temporary lookup.\nThat pointer is not owned by the neigh_node and may no longer refer to a\nlive originator entry after purge handling runs.\n\nStop storing the auxiliary originator pointer in the BAT IV neighbor\nstate. When BAT IV needs the neighbor originator data, resolve it from\nthe stored neighbor address and drop the reference again after use.\n\n[sven: avoid bonding logic for outgoing OGM]","Type":"Description","Title":"batman-adv: stop caching unowned originator pointers in BAT IV"}]}}}