In the Linux kernel, the following vulnerability has been resolved:
rhashtable: clear stale iter->p on table restart
rhashtable_walk_start_check() has two restart paths when resuming a walk.
When iter->walker.tbl is valid, it re-validates iter->p against the table
and sets iter->p = NULL if the object is gone. When iter->walker.tbl is
NULL (table was freed during resize), it resets slot and skip but forgets
to clear iter->p.
rhashtable_walk_next() then dereferences the stale iter->p, reading
freed memory. This is a use-after-free.
Any caller that does multi-fragment rhashtable walks across
walk_stop/walk_start boundaries is affected. Concrete cases include
netlink_diag (__netlink_diag_dump in net/netlink/diag.c) and TIPC
(tipc_nl_sk_walk in net/tipc/socket.c).
Crash stack (netlink_diag):
BUG: KASAN: slab-use-after-free in rhashtable_walk_next+0x365/0x3c0
Read of size 8 at addr ffff88801a9d2438 (freed kmalloc-2k, offset 1080)
Call Trace:
rhashtable_walk_next+0x365/0x3c0 (lib/rhashtable.c:1016)
__netlink_diag_dump+0x160/0x760 (net/netlink/diag.c:122)
netlink_diag_dump+0xc2/0x240
netlink_dump+0x5bc/0x1270
netlink_recvmsg+0x7a3/0x980
sock_recvmsg+0x1bc/0x200
__sys_recvfrom+0x1d4/0x2c0
References
Configurations
Configuration 1 (hide)
|
History
13 Nov 2026, 18:17
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/042fda5c088015f18838e5c692659a7be60aeb26 - Patch | |
| References | () https://git.kernel.org/stable/c/0955b65c2b47c30b439e2cf1b1e375073aa0413a - Patch | |
| References | () https://git.kernel.org/stable/c/3ff7c1dbf722cf3fa538672452ba182318e0fcc3 - Patch | |
| References | () https://git.kernel.org/stable/c/4169d9fb92f313ff8e7e83d733c1ecdcc93eebd3 - Patch | |
| References | () https://git.kernel.org/stable/c/8173f7e2ce67e6ca1d4763f3da14e5b01ce77456 - Patch | |
| References | () https://git.kernel.org/stable/c/a0406c40c6638c5ae50257db6297b2fba6c9ba16 - Patch | |
| References | () https://git.kernel.org/stable/c/ba510b5e9fe396497d31162acb579f210adfe6c8 - Patch | |
| References | () https://git.kernel.org/stable/c/c39643ad99fea749be50615550e8f0e6d6e60694 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:7.2:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.2:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* |
19 Oct 2026, 21:17
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 |
Information
Published : 2026-08-04 07:16
Updated : 2026-11-13 18:17
NVD link : CVE-2026-64563
Mitre link : CVE-2026-64563
CVE.ORG link : CVE-2026-64563
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free