PT-2026-2533 · Linux+2 · Linux Kernel+2
CVE-2025-68801
·
Published
2025-12-02
·
Updated
2026-07-18
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.18.0-rc4-virtme-g36b21a067510
Description
The Linux kernel contains a use-after-free flaw within the mlxsw spectrum router component. This issue occurs when dereferencing a neighbour, potentially leading to system instability. The problem stems from storing a pointer to a neighbour without maintaining a reference to it, and a reference is only taken when the neighbour is used by a nexthop. The fix simplifies the reference counting scheme by always taking a reference when storing a neighbour pointer in a neighbour entry, and avoiding taking a reference when the neighbour is used by a nexthop as the nexthop entry already holds a reference.
Recommendations
Update to a version later than 6.18.0-rc4-virtme-g36b21a067510.
Exploit
Fix
Use After Free
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Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu