Not yet scoredPublished Sep 17, 2026

CVE-2026-90114net: bridge: Reject descending VLAN tunnel ranges

Updated under an hour ago (Oct 28, 2026, 8:10 AM ET)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	94339443686b36d3223bc032b7947267474e2679 builds before 1181f6bad009408a259bab6aaf0681f11b487972; 94339443686b36d3223bc032b7947267474e2679 builds before 5a8e0e3a18b5e3172343b8479c5d04187f5b4795; 94339443686b36d3223bc032b7947267474e2679 builds before 0874a6d5275091429ec4c675c54c53a8776665ae; 94339443686b36d3223bc032b7947267474e2679 builds before 4b0f5b25f114651f03058395b490626c4444875e; from 94339443686b36d3223bc032b7947267474e2679 before bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17; from 94339443686b36d3223bc032b7947267474e2679 before c0444d7499f113d6b7803ef0175591464e17525e; 94339443686b36d3223bc032b7947267474e2679 builds before 434849b21ef56b09d16e6366b2a230002f363e45; from 94339443686b36d3223bc032b7947267474e2679 before b74a072d8fb71d3c9ffba4a17d5943e63266fb38	CNA record

References

References

https://git.kernel.org/stable/c/1181f6bad009408a259bab6aaf0681f11b487972
https://git.kernel.org/stable/c/5a8e0e3a18b5e3172343b8479c5d04187f5b4795
https://git.kernel.org/stable/c/0874a6d5275091429ec4c675c54c53a8776665ae
https://git.kernel.org/stable/c/4b0f5b25f114651f03058395b490626c4444875e
https://git.kernel.org/stable/c/bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17
https://git.kernel.org/stable/c/c0444d7499f113d6b7803ef0175591464e17525e
https://git.kernel.org/stable/c/434849b21ef56b09d16e6366b2a230002f363e45
https://git.kernel.org/stable/c/b74a072d8fb71d3c9ffba4a17d5943e63266fb38

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.