{"schema_version":"1.9.0","id":"CVE-2026-63973","published":"2026-07-19T14:55:59.263Z","modified":"2026-08-27T18:26:09.092544927Z","related":["SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","openSUSE-SU-2026:21555-1"],"summary":"net: mana: Add NULL guards in teardown path to prevent panic on attach failure","details":"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":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f"},{"fixed":"da7e4a1aaf397af6a094f640c92d6bc7564c10db"},{"fixed":"95e414f8324385771bdfd6d497a01d5593813ccb"},{"fixed":"26a96fa81496afe7d162d172ccdc8cb9dbc685d2"},{"fixed":"da87896f34e0a51489811d1a684e2953099ca98f"},{"fixed":"0a9c520fdcb1cb2e79c163c12d359b5e1ee40007"},{"fixed":"17bfe0a8c014ee1d542ad352cd6a0a505361664a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63973.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.13.0"},{"fixed":"6.1.176"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.93"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.35"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63973.json"}}],"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a9c520fdcb1cb2e79c163c12d359b5e1ee40007"},{"type":"WEB","url":"https://git.kernel.org/stable/c/17bfe0a8c014ee1d542ad352cd6a0a505361664a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/26a96fa81496afe7d162d172ccdc8cb9dbc685d2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/95e414f8324385771bdfd6d497a01d5593813ccb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/da7e4a1aaf397af6a094f640c92d6bc7564c10db"},{"type":"WEB","url":"https://git.kernel.org/stable/c/da87896f34e0a51489811d1a684e2953099ca98f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63973.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63973"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63973.json"}}