{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63973","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T07:54:57.024Z","datePublished":"2026-07-19T14:55:59.263Z","dateUpdated":"2026-07-19T14:55:59.263Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-07-19T14:55:59.263Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/microsoft/mana/mana_en.c"],"versions":[{"version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","lessThan":"da7e4a1aaf397af6a094f640c92d6bc7564c10db","status":"affected","versionType":"git"},{"version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","lessThan":"95e414f8324385771bdfd6d497a01d5593813ccb","status":"affected","versionType":"git"},{"version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","lessThan":"26a96fa81496afe7d162d172ccdc8cb9dbc685d2","status":"affected","versionType":"git"},{"version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","lessThan":"da87896f34e0a51489811d1a684e2953099ca98f","status":"affected","versionType":"git"},{"version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","lessThan":"0a9c520fdcb1cb2e79c163c12d359b5e1ee40007","status":"affected","versionType":"git"},{"version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","lessThan":"17bfe0a8c014ee1d542ad352cd6a0a505361664a","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/microsoft/mana/mana_en.c"],"versions":[{"version":"5.13","status":"affected"},{"version":"0","lessThan":"5.13","status":"unaffected","versionType":"semver"},{"version":"6.1.176","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.143","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.93","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.35","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.12","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":"5.13","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.1"}]}]}],"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"}}}}