CVE-2025-38212

Summary

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

ipc: fix to protect IPCS lookups using RCU

syzbot reported that it discovered a use-after-free vulnerability, 0

idr_for_each() is protected by rwsem, but this is not enough. If it is not protected by RCU read-critical region, when idr_for_each() calls radix_tree_node_free() through call_rcu() to free the radix_tree_node structure, the node will be freed immediately, and when reading the next node in radix_tree_for_each_slot(), the already freed memory may be read.

Therefore, we need to add code to make sure that idr_for_each() is protected within the RCU read-critical region when we call it in shm_destroy_orphaned().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb34a6b1da371ed8af1221459a18c67970f7e3d53 < 5f1e1573bf103303944fd7225559de5d8297539caffected
LinuxLinuxb34a6b1da371ed8af1221459a18c67970f7e3d53 < b968ba8bfd9f90914957bbbd815413bf6a98eca7affected
LinuxLinuxb34a6b1da371ed8af1221459a18c67970f7e3d53 < 74bc813d11c30e28fc5261dc877cca662ccfac68affected
LinuxLinuxb34a6b1da371ed8af1221459a18c67970f7e3d53 < 78297d53d3878d43c1d627d20cd09f611fa4b91daffected
LinuxLinuxb34a6b1da371ed8af1221459a18c67970f7e3d53 < 5180561afff8e0f029073c8c8117c95c6512d1f9affected
LinuxLinuxb34a6b1da371ed8af1221459a18c67970f7e3d53 < 68c173ea138b66d7dd1fd980c9bc578a18e11884affected
LinuxLinuxb34a6b1da371ed8af1221459a18c67970f7e3d53 < b0b6bf90ce2699a574b3683e22c44d0dcdd7a057affected
LinuxLinuxb34a6b1da371ed8af1221459a18c67970f7e3d53 < d66adabe91803ef34a8b90613c81267b5ded1472affected
LinuxLinux3.1affected
LinuxLinux0 < 3.1unaffected
LinuxLinux5.4.295 <= 5.4.*unaffected
LinuxLinux5.10.239 <= 5.10.*unaffected
LinuxLinux5.15.186 <= 5.15.*unaffected
LinuxLinux6.1.142 <= 6.1.*unaffected
LinuxLinux6.6.95 <= 6.6.*unaffected
LinuxLinux6.12.35 <= 6.12.*unaffected
LinuxLinux6.15.4 <= 6.15.*unaffected
LinuxLinux6.16 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

Additional References

References