CVE-2026-90114

net: bridge: Reject descending VLAN tunnel ranges

State: Published
Severity: Not scored
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	94339443686b36d3223bc032b7947267474e2679 to before 1181f6bad009408a259bab6aaf0681f11b487972Affected 94339443686b36d3223bc032b7947267474e2679 to before 5a8e0e3a18b5e3172343b8479c5d04187f5b4795Affected 94339443686b36d3223bc032b7947267474e2679 to before 0874a6d5275091429ec4c675c54c53a8776665aeAffected 94339443686b36d3223bc032b7947267474e2679 to before 4b0f5b25f114651f03058395b490626c4444875eAffected 94339443686b36d3223bc032b7947267474e2679 to before bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17Affected 94339443686b36d3223bc032b7947267474e2679 to before c0444d7499f113d6b7803ef0175591464e17525eAffected 94339443686b36d3223bc032b7947267474e2679 to before 434849b21ef56b09d16e6366b2a230002f363e45Affected 94339443686b36d3223bc032b7947267474e2679 to before b74a072d8fb71d3c9ffba4a17d5943e63266fb38Affected
LinuxLinux	5.9Affected before 5.9Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

94339443686b36d3223bc032b7947267474e2679 to before 1181f6bad009408a259bab6aaf0681f11b487972Affected
94339443686b36d3223bc032b7947267474e2679 to before 5a8e0e3a18b5e3172343b8479c5d04187f5b4795Affected
94339443686b36d3223bc032b7947267474e2679 to before 0874a6d5275091429ec4c675c54c53a8776665aeAffected
94339443686b36d3223bc032b7947267474e2679 to before 4b0f5b25f114651f03058395b490626c4444875eAffected
94339443686b36d3223bc032b7947267474e2679 to before bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17Affected
94339443686b36d3223bc032b7947267474e2679 to before c0444d7499f113d6b7803ef0175591464e17525eAffected
94339443686b36d3223bc032b7947267474e2679 to before 434849b21ef56b09d16e6366b2a230002f363e45Affected
94339443686b36d3223bc032b7947267474e2679 to before b74a072d8fb71d3c9ffba4a17d5943e63266fb38Affected

LinuxLinux

5.9Affected
before 5.9Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.