CVE-2026-63973
- Source
- https://cve.org/CVERecord?id=CVE-2026-63973
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-63973.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-63973
- Downstream
- Related
- Published
- 2026-07-19T14:55:59Z
- Modified
- 2026-08-27T18:27:17Z
- 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:
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63973.json" }- References
-
- https://git.kernel.org/stable/c/0a9c520fdcb1cb2e79c163c12d359b5e1ee40007
- https://git.kernel.org/stable/c/17bfe0a8c014ee1d542ad352cd6a0a505361664a
- https://git.kernel.org/stable/c/26a96fa81496afe7d162d172ccdc8cb9dbc685d2
- https://git.kernel.org/stable/c/95e414f8324385771bdfd6d497a01d5593813ccb
- https://git.kernel.org/stable/c/da7e4a1aaf397af6a094f640c92d6bc7564c10db
- https://git.kernel.org/stable/c/da87896f34e0a51489811d1a684e2953099ca98f
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63973.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-63973
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedca9c54d2d6a5ab2430c4eda364c77125d62e5e0fFixedda7e4a1aaf397af6a094f640c92d6bc7564c10dbFixed95e414f8324385771bdfd6d497a01d5593813ccbFixed26a96fa81496afe7d162d172ccdc8cb9dbc685d2Fixedda87896f34e0a51489811d1a684e2953099ca98fFixed0a9c520fdcb1cb2e79c163c12d359b5e1ee40007Fixed17bfe0a8c014ee1d542ad352cd6a0a505361664a
Linux / Kernel
Package
- Name
- Kernel