CVE-2026-64094

batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface

State: Published
Severity: Not scored
Published: Jul 19, 2026
Updated: Jul 19, 2026
Reserved: Jul 19, 2026

Description

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

batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface

Without rtnl_lock held, a hardif might be retrieved as primary interface of a meshif, but then (while operating on this interface) getting decoupled from the mesh interface. In this case, the meshif still exists but the pointer from the primary hardif to the meshif is set to NULL.

The mesh_iface must be checked first to be non-NULL before continuing to send an ARP request using meshif.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	23721387c409087fd3b97e274f34d3ddc0970b74 to before 4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before 53cb3511f6eda37d3bd923545fdba6013b6d7bb7Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before efb62458c94db1fe3a287e7e89c31b0cfb03f938Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before 2a8c9e86529156c62d9187b9ed9454c31665ad33Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before 0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before 6921a7683ae9ad0208d829e71f725a9e25ccff49Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before 555b8d3f5c313d81d46274fd0976352dafc80124Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before f80d3d98d2ff78d9e2fe5d68b1f45948c4f7bd24Affected
LinuxLinux	3.5Affected before 3.5Not affected 5.10.259 through 5.10.Not affected 5.15.210 through 5.15.Not affected 6.1.176 through 6.1.Not affected 6.6.143 through 6.6.Not affected 6.12.93 through 6.12.Not affected 6.18.34 through 6.18.Not affected 7.0.11 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

23721387c409087fd3b97e274f34d3ddc0970b74 to before 4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before 53cb3511f6eda37d3bd923545fdba6013b6d7bb7Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before efb62458c94db1fe3a287e7e89c31b0cfb03f938Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before 2a8c9e86529156c62d9187b9ed9454c31665ad33Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before 0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before 6921a7683ae9ad0208d829e71f725a9e25ccff49Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before 555b8d3f5c313d81d46274fd0976352dafc80124Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before f80d3d98d2ff78d9e2fe5d68b1f45948c4f7bd24Affected

LinuxLinux

3.5Affected
before 3.5Not affected
5.10.259 through 5.10.*Not affected
5.15.210 through 5.15.*Not affected
6.1.176 through 6.1.*Not affected
6.6.143 through 6.6.*Not affected
6.12.93 through 6.12.*Not affected
6.18.34 through 6.18.*Not affected
7.0.11 through 7.0.*Not affected
7.1 and laterNot affected

References

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