{"api_version":"1","generated_at":"2026-07-24T00:35:47+00:00","cve":"CVE-2026-63973","urls":{"html":"https://cve.report/CVE-2026-63973","api":"https://cve.report/api/cve/CVE-2026-63973.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63973","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63973"},"summary":{"title":"net: mana: Add NULL guards in teardown path to prevent panic on attach failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Add NULL guards in teardown path to prevent panic on attach failure\n\nWhen queue allocation fails partway through, the error cleanup frees\nand NULLs apc->tx_qp and apc->rxqs. Multiple teardown paths such as\nmana_remove(), mana_change_mtu() recovery, and internal error handling\nin mana_alloc_queues() can subsequently call into functions that\ndereference these pointers without NULL checks:\n\n- mana_chn_setxdp() dereferences apc->rxqs[0], causing a NULL pointer\n  dereference panic (CR2: 0000000000000000 at mana_chn_setxdp+0x26).\n- mana_destroy_vport() iterates apc->rxqs without a NULL check.\n- mana_fence_rqs() iterates apc->rxqs without a NULL check.\n- mana_dealloc_queues() iterates apc->tx_qp without a NULL check.\n\nAdd NULL guards for apc->rxqs in mana_fence_rqs(),\nmana_destroy_vport(), and before the mana_chn_setxdp() call. Add a\nNULL guard for apc->tx_qp in mana_dealloc_queues() to skip TX queue\ndraining when TX queues were never allocated or already freed.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:16","updated_at":"2026-07-19 16:17:16"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/da7e4a1aaf397af6a094f640c92d6bc7564c10db","name":"https://git.kernel.org/stable/c/da7e4a1aaf397af6a094f640c92d6bc7564c10db","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/26a96fa81496afe7d162d172ccdc8cb9dbc685d2","name":"https://git.kernel.org/stable/c/26a96fa81496afe7d162d172ccdc8cb9dbc685d2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/da87896f34e0a51489811d1a684e2953099ca98f","name":"https://git.kernel.org/stable/c/da87896f34e0a51489811d1a684e2953099ca98f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0a9c520fdcb1cb2e79c163c12d359b5e1ee40007","name":"https://git.kernel.org/stable/c/0a9c520fdcb1cb2e79c163c12d359b5e1ee40007","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/95e414f8324385771bdfd6d497a01d5593813ccb","name":"https://git.kernel.org/stable/c/95e414f8324385771bdfd6d497a01d5593813ccb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/17bfe0a8c014ee1d542ad352cd6a0a505361664a","name":"https://git.kernel.org/stable/c/17bfe0a8c014ee1d542ad352cd6a0a505361664a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63973","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63973","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f da7e4a1aaf397af6a094f640c92d6bc7564c10db git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 95e414f8324385771bdfd6d497a01d5593813ccb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 26a96fa81496afe7d162d172ccdc8cb9dbc685d2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f da87896f34e0a51489811d1a684e2953099ca98f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 0a9c520fdcb1cb2e79c163c12d359b5e1ee40007 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 17bfe0a8c014ee1d542ad352cd6a0a505361664a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.93 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 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":"63973","cve":"CVE-2026-63973","epss":"0.002050000","percentile":"0.107240000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/microsoft/mana/mana_en.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"da7e4a1aaf397af6a094f640c92d6bc7564c10db","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"95e414f8324385771bdfd6d497a01d5593813ccb","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"26a96fa81496afe7d162d172ccdc8cb9dbc685d2","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"da87896f34e0a51489811d1a684e2953099ca98f","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"0a9c520fdcb1cb2e79c163c12d359b5e1ee40007","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"17bfe0a8c014ee1d542ad352cd6a0a505361664a","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/microsoft/mana/mana_en.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","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":"6.1.176","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.93","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"5.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Add NULL guards in teardown path to prevent panic on attach failure\n\nWhen queue allocation fails partway through, the error cleanup frees\nand NULLs apc->tx_qp and apc->rxqs. Multiple teardown paths such as\nmana_remove(), mana_change_mtu() recovery, and internal error handling\nin mana_alloc_queues() can subsequently call into functions that\ndereference these pointers without NULL checks:\n\n- mana_chn_setxdp() dereferences apc->rxqs[0], causing a NULL pointer\n  dereference panic (CR2: 0000000000000000 at mana_chn_setxdp+0x26).\n- mana_destroy_vport() iterates apc->rxqs without a NULL check.\n- mana_fence_rqs() iterates apc->rxqs without a NULL check.\n- mana_dealloc_queues() iterates apc->tx_qp without a NULL check.\n\nAdd NULL guards for apc->rxqs in mana_fence_rqs(),\nmana_destroy_vport(), and before the mana_chn_setxdp() call. Add a\nNULL guard for apc->tx_qp in mana_dealloc_queues() to skip TX queue\ndraining when TX queues were never allocated or already freed."}],"providerMetadata":{"dateUpdated":"2026-07-19T14:55:59.263Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/da7e4a1aaf397af6a094f640c92d6bc7564c10db"},{"url":"https://git.kernel.org/stable/c/95e414f8324385771bdfd6d497a01d5593813ccb"},{"url":"https://git.kernel.org/stable/c/26a96fa81496afe7d162d172ccdc8cb9dbc685d2"},{"url":"https://git.kernel.org/stable/c/da87896f34e0a51489811d1a684e2953099ca98f"},{"url":"https://git.kernel.org/stable/c/0a9c520fdcb1cb2e79c163c12d359b5e1ee40007"},{"url":"https://git.kernel.org/stable/c/17bfe0a8c014ee1d542ad352cd6a0a505361664a"}],"title":"net: mana: Add NULL guards in teardown path to prevent panic on attach failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63973","datePublished":"2026-07-19T14:55:59.263Z","dateReserved":"2026-07-19T07:54:57.024Z","dateUpdated":"2026-07-19T14:55:59.263Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:16","lastModifiedDate":"2026-07-19 16:17:16","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63973","Ordinal":"1","Title":"net: mana: Add NULL guards in teardown path to prevent panic on ","CVE":"CVE-2026-63973","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63973","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Add NULL guards in teardown path to prevent panic on attach failure\n\nWhen queue allocation fails partway through, the error cleanup frees\nand NULLs apc->tx_qp and apc->rxqs. Multiple teardown paths such as\nmana_remove(), mana_change_mtu() recovery, and internal error handling\nin mana_alloc_queues() can subsequently call into functions that\ndereference these pointers without NULL checks:\n\n- mana_chn_setxdp() dereferences apc->rxqs[0], causing a NULL pointer\n  dereference panic (CR2: 0000000000000000 at mana_chn_setxdp+0x26).\n- mana_destroy_vport() iterates apc->rxqs without a NULL check.\n- mana_fence_rqs() iterates apc->rxqs without a NULL check.\n- mana_dealloc_queues() iterates apc->tx_qp without a NULL check.\n\nAdd NULL guards for apc->rxqs in mana_fence_rqs(),\nmana_destroy_vport(), and before the mana_chn_setxdp() call. Add a\nNULL guard for apc->tx_qp in mana_dealloc_queues() to skip TX queue\ndraining when TX queues were never allocated or already freed.","Type":"Description","Title":"net: mana: Add NULL guards in teardown path to prevent panic on "}]}}}