net: phonet: free phonet_device after RCU grace period

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Summary

CVECVE-2026-53157
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-25 09:16:33 UTC
Updated2026-06-25 09:16:33 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: phonet: free phonet_device after RCU grace period phonet_device_destroy() removes a phonet_device from the per-net device list with list_del_rcu(), but frees it immediately. RCU readers walking the same list can still hold a pointer to the object after it has been removed, leading to a slab-use-after-free. Use kfree_rcu(), matching the lifetime rule already used by phonet_address_del() for the same object type.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected eeb74a9d45f781ec6f47b9e0a75a6a427b53f165 52b8f5ef82c886f7cd24617915e4b1579ddfd001 git Not specified
CNA Linux Linux affected eeb74a9d45f781ec6f47b9e0a75a6a427b53f165 bff309ea51f1395c1ef8be8b75ce62d28a319113 git Not specified
CNA Linux Linux affected eeb74a9d45f781ec6f47b9e0a75a6a427b53f165 71de0177b28da751f407581a4515cf4d762f6296 git Not specified
CNA Linux Linux affected 2.6.33 Not specified
CNA Linux Linux unaffected 2.6.33 semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/52b8f5ef82c886f7cd24617915e4b1579ddfd001 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/71de0177b28da751f407581a4515cf4d762f6296 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/bff309ea51f1395c1ef8be8b75ce62d28a319113 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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