CVE-2026-63972

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Source
https://cve.org/CVERecord?id=CVE-2026-63972
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63972.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-63972
Downstream
Related
Published
2026-07-19T14:55:58Z
Modified
2026-08-27T18:26:08Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
net: mana: Skip redundant detach on already-detached port
Details

In the Linux kernel, the following vulnerability has been resolved:

net: mana: Skip redundant detach on already-detached port

When mana_per_port_queue_reset_work_handler() runs after a previous detach succeeded but attach failed, the port is left in a detached state with apc->tx_qp and apc->rxqs already freed. Calling mana_detach() again unconditionally leads to NULL pointer dereferences during queue teardown.

Add an early exit in mana_detach() when the port is already in detached state (!netif_device_present) for non-close callers, making it safe to call idempotently. This allows the queue reset handler and other recovery paths to simply retry mana_attach() without redundant teardown.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63972.json"
}
References

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
Introduced
fb9f98e1041a30dd5766620a2a64cb472b54caa9
Fixed
c4152b4e28b3e550ec99351bf900e2c24c2608cc
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3b194343c25084a8d2fa0c0f2c9e80f3080fd732
Fixed
7ae590797f9b5c240aaea5773f5f00977a42a846
Fixed
5b05aa36ee24297d7296ca58dfd8c448d0e4cda3
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6.18.33
Fixed
6.18.35

Affected versions

v6.*
v6.18.33
v6.18.34

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63972.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
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-2026-63972.json"