CVE-2026-74606

Summary

In the Linux kernel, the following vulnerability has been resolved:

eventfs: Fix use-after-free in eventfs_remove_rec()

eventfs_remove_rec() recursively removes the child at the current loop position. After the recursive call returns, list_for_each_entry() advances by reading list.next from the removed child.

If free_ei() drops the final reference, release_ei() reuses the list/rcu union to queue an SRCU callback. The child may be freed before that read. The eventfs_mutex serializes list updates, but it does not keep the removed child alive or prevent the SRCU callback from running.

Use list_for_each_entry_safe() to save the next sibling before recursively removing the current child.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5dfb04100326f70e3b2d2872c2476ed20b804837 < b77581b25e213e83b79ce11eb30024e55ceeb3e9affected
LinuxLinux43aa6f97c2d03a52c1ddb86768575fc84344bdbb < f161d7861a0bfdf10af6b738b3b57636204661fbaffected
LinuxLinux43aa6f97c2d03a52c1ddb86768575fc84344bdbb < 5635211b44969f4816e29ec4d5f8665fb39535d0affected
LinuxLinux43aa6f97c2d03a52c1ddb86768575fc84344bdbb < 74bb1eaf72d185a78c879eb2678ea500f82f46a8affected
LinuxLinux43aa6f97c2d03a52c1ddb86768575fc84344bdbb < fd73b691702170d37d66f4b0278530cea8ed419aaffected
LinuxLinux5a43badefe0eccca0c26144c0a44b8d417ce8103affected
LinuxLinux6.6.18 < 6.6.152affected
LinuxLinux6.7.6 < 6.8affected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.6.152 <= 6.6.*unaffected
LinuxLinux6.12.104 <= 6.12.*unaffected
LinuxLinux6.18.45 <= 6.18.*unaffected
LinuxLinux7.1.9 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References