net: mana: Add NULL guards in teardown path to prevent panic on attach failure
Summary
| CVE | CVE-2026-63973 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-19 16:17:16 UTC |
| Updated | 2026-07-19 16:17:16 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.002050000 probability, percentile 0.107240000 (date 2026-07-20)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f da7e4a1aaf397af6a094f640c92d6bc7564c10db git | Not specified |
| CNA | Linux | Linux | affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 95e414f8324385771bdfd6d497a01d5593813ccb git | Not specified |
| CNA | Linux | Linux | affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 26a96fa81496afe7d162d172ccdc8cb9dbc685d2 git | Not specified |
| CNA | Linux | Linux | affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f da87896f34e0a51489811d1a684e2953099ca98f git | Not specified |
| CNA | Linux | Linux | affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 0a9c520fdcb1cb2e79c163c12d359b5e1ee40007 git | Not specified |
| CNA | Linux | Linux | affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 17bfe0a8c014ee1d542ad352cd6a0a505361664a git | Not specified |
| CNA | Linux | Linux | affected 5.13 | Not specified |
| CNA | Linux | Linux | unaffected 5.13 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.176 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.143 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.93 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.35 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.12 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/da7e4a1aaf397af6a094f640c92d6bc7564c10db | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/26a96fa81496afe7d162d172ccdc8cb9dbc685d2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/da87896f34e0a51489811d1a684e2953099ca98f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0a9c520fdcb1cb2e79c163c12d359b5e1ee40007 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/95e414f8324385771bdfd6d497a01d5593813ccb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/17bfe0a8c014ee1d542ad352cd6a0a505361664a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.