EUVD-2026-38716
GHSA-7c77-5hjp-3754
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Race condition between interface teardown and workqueue dispatch elevates AC to H; local NET_ADMIN access required sets PR:L; impact is kernel crash only, so A:H with C:N and I:N.
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
5DescriptionNVD
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: v: stop OGMv2 on disabled interface
When a batadv_hard_iface is disabled, its mesh_iface pointer is set to NULL. However, batadv_v_ogm_send_meshif() may still dispatch OGMs via batadv_v_ogm_queue_on_if() for interfaces that have since lost their mesh_iface association. This results in a NULL pointer dereference when batadv_v_ogm_queue_on_if() unconditionally calls netdev_priv() on the now NULL hard_iface->mesh_iface to retrieve the batadv_priv.
It is necessary to ensure that the batadv_v_ogm_queue_on_if() checks that it is using the same mesh_iface for which batadv_v_ogm_send_meshif() was called.
AnalysisAI
NULL pointer dereference in the Linux kernel's batman-adv OGMv2 subsystem allows a local low-privilege user to crash the kernel by racing interface teardown against OGM dispatch. When a batman-adv hard interface is disabled and its mesh_iface pointer is set to NULL, the batadv_v_ogm_queue_on_if() function continues to call netdev_priv() on that NULL pointer, triggering a kernel panic. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The batman-adv kernel module must be loaded and at least one batman-adv mesh interface must be configured and actively transmitting OGMv2 packets - this is a non-default configuration not present in standard Linux installs. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 5.5 with AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H accurately describes a local, low-privilege denial-of-service with no data exposure or privilege escalation potential. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A local user with NET_ADMIN capability on a Linux system running batman-adv repeatedly issues interface-disable commands (e.g., via batctl or ip link set down on a mesh interface) in rapid succession while the OGMv2 workqueue is actively dispatching packets. The race window closes when batadv_v_ogm_queue_on_if() fires after mesh_iface has been set to NULL, causing netdev_priv() to dereference the NULL pointer and crashing the kernel. … |
| Remediation | Upgrade the Linux kernel to a patched stable release: 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.34, 7.0.11, or 7.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Denial Of Service
View allShare
External POC / Exploit Code
Leaving vuln.today