{"api_version":"1","generated_at":"2026-05-13T18:46:16+00:00","cve":"CVE-2026-43089","urls":{"html":"https://cve.report/CVE-2026-43089","api":"https://cve.report/api/cve/CVE-2026-43089.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43089","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43089"},"summary":{"title":"xfrm_user: fix info leak in build_mapping()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_mapping()\n\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\nfield, which ends up never getting set to zero before copying out to\nuserspace.  Fix that up by zeroing out the whole structure before\nsetting individual variables.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 10:16:22","updated_at":"2026-05-06 13:08:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10","name":"https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2","name":"https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d","name":"https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02","name":"https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c","name":"https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43089","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43089","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 d3125c541a96fb3c0fc7210112684baf22b6c24d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 5a1a4b049ddde41466ccac0daeec326254b133f2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 700c9622b23c33b5933e6dcea816492c064e4e10 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4 1beb76b2053b68c491b78370794b8ff63c8f8c02 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.29","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.29 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.136 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.83 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.24 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.14 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * 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/xfrm/xfrm_user.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d3125c541a96fb3c0fc7210112684baf22b6c24d","status":"affected","version":"3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4","versionType":"git"},{"lessThan":"5a1a4b049ddde41466ccac0daeec326254b133f2","status":"affected","version":"3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4","versionType":"git"},{"lessThan":"f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c","status":"affected","version":"3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4","versionType":"git"},{"lessThan":"700c9622b23c33b5933e6dcea816492c064e4e10","status":"affected","version":"3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4","versionType":"git"},{"lessThan":"1beb76b2053b68c491b78370794b8ff63c8f8c02","status":"affected","version":"3a2dfbe8acb154905fdc2fd03ec56df42e6c4cc4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/xfrm/xfrm_user.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.29"},{"lessThan":"2.6.29","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.136","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.83","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.136","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.83","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.24","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.14","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"2.6.29","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_mapping()\n\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\nfield, which ends up never getting set to zero before copying out to\nuserspace.  Fix that up by zeroing out the whole structure before\nsetting individual variables."}],"providerMetadata":{"dateUpdated":"2026-05-06T07:40:22.630Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d"},{"url":"https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2"},{"url":"https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c"},{"url":"https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10"},{"url":"https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02"}],"title":"xfrm_user: fix info leak in build_mapping()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43089","datePublished":"2026-05-06T07:40:22.630Z","dateReserved":"2026-05-01T14:12:55.984Z","dateUpdated":"2026-05-06T07:40:22.630Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 10:16:22","lastModifiedDate":"2026-05-06 13:08:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43089","Ordinal":"1","Title":"xfrm_user: fix info leak in build_mapping()","CVE":"CVE-2026-43089","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43089","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm_user: fix info leak in build_mapping()\n\nstruct xfrm_usersa_id has a one-byte padding hole after the proto\nfield, which ends up never getting set to zero before copying out to\nuserspace.  Fix that up by zeroing out the whole structure before\nsetting individual variables.","Type":"Description","Title":"xfrm_user: fix info leak in build_mapping()"}]}}}