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CVE-2026-90114

Unknown

Last modified

CVE-2026-90114 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: net: bridge: Reject descending VLAN tunnel ranges A pair of descending VLAN and tunnel IDs can pass the tunnel range span check. The VLAN subtraction produces a negative int, which is converted to unsigned when compared with the u32 tunnel ID subtraction.

Description

In the Linux kernel, the following vulnerability has been resolved: net: bridge: Reject descending VLAN tunnel ranges A pair of descending VLAN and tunnel IDs can pass the tunnel range span check. The VLAN subtraction produces a negative int, which is converted to unsigned when compared with the u32 tunnel ID subtraction. It can therefore equal the wrapped tunnel ID delta. The range loop then performs no iterations. Since the batched notification handling added a post-loop error check, this leaves err uninitialized and makes the request's return value unpredictable. Reject descending VLAN ranges before comparing the spans. Valid ascending and single-entry ranges remain unchanged, while malformed descending ranges consistently return -EINVAL. This issue was found by a static analysis checker and confirmed by manual source review.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 94339443686b36d3223bc032b7947267474e2679, < 1181f6bad009408a259bab6aaf0681f11b487972; >= 94339443686b36d3223bc032b7947267474e2679, < 5a8e0e3a18b5e3172343b8479c5d04187f5b4795; >= 94339443686b36d3223bc032b7947267474e2679, < 0874a6d5275091429ec4c675c54c53a8776665ae; >= 94339443686b36d3223bc032b7947267474e2679, < 4b0f5b25f114651f03058395b490626c4444875e; >= 94339443686b36d3223bc032b7947267474e2679, < bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17; >= 94339443686b36d3223bc032b7947267474e2679, < c0444d7499f113d6b7803ef0175591464e17525e; >= 94339443686b36d3223bc032b7947267474e2679, < 434849b21ef56b09d16e6366b2a230002f363e45; >= 94339443686b36d3223bc032b7947267474e2679, < b74a072d8fb71d3c9ffba4a17d5943e63266fb38
LinuxLinux5.9

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90114?
In the Linux kernel, the following vulnerability has been resolved: net: bridge: Reject descending VLAN tunnel ranges A pair of descending VLAN and tunnel IDs can pass the tunnel range span check. The VLAN subtraction produces a negative int, which is converted to unsigned when compared with the u32 tunnel ID subtraction. It can therefore equal the wrapped tunnel ID delta. The range loop then performs no iterations. Since the batched notification handling added a post-loop error check, this leaves err uninitialized and makes the request's return value unpredictable. Reject descending VLAN ranges before comparing the spans. Valid ascending and single-entry ranges remain unchanged, while malformed descending ranges consistently return -EINVAL. This issue was found by a static analysis checker and confirmed by manual source review.
How severe is CVE-2026-90114?
Severity scoring for CVE-2026-90114 is pending analysis.
How do I fix CVE-2026-90114?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST