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CVE-2026-63973

net: mana: Add NULL guards in teardown path to prevent panic on attach failure PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: net: mana: Add NULL guards in teardown path to prevent panic on attach failure When queue allocation fails partway through, the error cleanup frees and NULLs apc->tx_qp and apc->rxqs. Multiple teardown paths such as mana_remove(), mana_change_mtu() recovery, and internal error handling in mana_alloc_queues() can subsequently call into functions that dereference these pointers without NULL checks: - mana_chn_setxdp() dereferences apc->rxqs[0], causing a NULL pointer dereference panic (CR2: 0000000000000000 at mana_chn_setxdp+0x26). - mana_destroy_vport() iterates apc->rxqs without a NULL check. - mana_fence_rqs() iterates apc->rxqs without a NULL check. - mana_dealloc_queues() iterates apc->tx_qp without a NULL check. Add NULL guards for apc->rxqs in mana_fence_rqs(), mana_destroy_vport(), and before the mana_chn_setxdp() call. Add a NULL guard for apc->tx_qp in mana_dealloc_queues() to skip TX queue draining when TX queues were never allocated or already freed.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before da7e4a1aaf397af6a094f640c92d6bc7564c10db; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before 95e414f8324385771bdfd6d497a01d5593813ccb; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before 26a96fa81496afe7d162d172ccdc8cb9dbc685d2; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before da87896f34e0a51489811d1a684e2953099ca98f; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before 0a9c520fdcb1cb2e79c163c12d359b5e1ee40007; affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f before 17bfe0a8c014ee1d542ad352cd6a0a505361664a
Linux / Linuxaffected 5.13; unaffected 0 before 5.13; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References