net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-90135
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:17:06 UTC
Updated2026-09-17 17:17:06 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs() sashiko is reporting that trying to read /sys/kernel/debug/ref_tracker/* causes use-afer-free crash when either alloc_percpu() or dev_addr_init() in alloc_netdev_mqs() failed, for commit 4d92b95ff2f9 ("net: add net device refcount tracker infrastructure") added ref_tracker_dir_exit() to only free_netdev() path.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4d92b95ff2f95f13df9bad0b5a25a9f60e72758d 2775bf36be7872834a7f8c0a0d9681a1a3e1cd4c git Not specified
CNA Linux Linux affected 4d92b95ff2f95f13df9bad0b5a25a9f60e72758d 5fe03b5257095e2beef0bc79e1f068fbd09a24c7 git Not specified
CNA Linux Linux affected 4d92b95ff2f95f13df9bad0b5a25a9f60e72758d 63ab05e8f9654aa100d366c0236399fda6ffaab1 git Not specified
CNA Linux Linux affected 4d92b95ff2f95f13df9bad0b5a25a9f60e72758d 0b1c2af8a22c35cb099c735c2f63ea3ba757557d git Not specified
CNA Linux Linux affected 5.17 Not specified
CNA Linux Linux unaffected 5.17 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/5fe03b5257095e2beef0bc79e1f068fbd09a24c7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2775bf36be7872834a7f8c0a0d9681a1a3e1cd4c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0b1c2af8a22c35cb099c735c2f63ea3ba757557d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/63ab05e8f9654aa100d366c0236399fda6ffaab1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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