net: bridge: Reject descending VLAN tunnel ranges

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90114
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:03 UTC
Updated2026-09-17 17:17:03 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 94339443686b36d3223bc032b7947267474e2679 1181f6bad009408a259bab6aaf0681f11b487972 git Not specified
CNA Linux Linux affected 94339443686b36d3223bc032b7947267474e2679 5a8e0e3a18b5e3172343b8479c5d04187f5b4795 git Not specified
CNA Linux Linux affected 94339443686b36d3223bc032b7947267474e2679 0874a6d5275091429ec4c675c54c53a8776665ae git Not specified
CNA Linux Linux affected 94339443686b36d3223bc032b7947267474e2679 4b0f5b25f114651f03058395b490626c4444875e git Not specified
CNA Linux Linux affected 94339443686b36d3223bc032b7947267474e2679 bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17 git Not specified
CNA Linux Linux affected 94339443686b36d3223bc032b7947267474e2679 c0444d7499f113d6b7803ef0175591464e17525e git Not specified
CNA Linux Linux affected 94339443686b36d3223bc032b7947267474e2679 434849b21ef56b09d16e6366b2a230002f363e45 git Not specified
CNA Linux Linux affected 94339443686b36d3223bc032b7947267474e2679 b74a072d8fb71d3c9ffba4a17d5943e63266fb38 git Not specified
CNA Linux Linux affected 5.9 Not specified
CNA Linux Linux unaffected 5.9 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4b0f5b25f114651f03058395b490626c4444875e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c0444d7499f113d6b7803ef0175591464e17525e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b74a072d8fb71d3c9ffba4a17d5943e63266fb38 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/434849b21ef56b09d16e6366b2a230002f363e45 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0874a6d5275091429ec4c675c54c53a8776665ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5a8e0e3a18b5e3172343b8479c5d04187f5b4795 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1181f6bad009408a259bab6aaf0681f11b487972 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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