CVE-2026-64563
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
rhashtable: clear stale iter->p on table restart
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
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 | affected | git | ba510b5e9fe396497d31162acb579f210adfe6c8 | Unavailable | None listed |
| 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 | affected | git | a0406c40c6638c5ae50257db6297b2fba6c9ba16 | Unavailable | None listed |
| 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 | affected | git | 0955b65c2b47c30b439e2cf1b1e375073aa0413a | Unavailable | None listed |
| 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 | affected | git | c39643ad99fea749be50615550e8f0e6d6e60694 | Unavailable | None listed |
| 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 | affected | git | 042fda5c088015f18838e5c692659a7be60aeb26 | Unavailable | None listed |
| 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 | affected | git | 3ff7c1dbf722cf3fa538672452ba182318e0fcc3 | Unavailable | None listed |
| 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 | affected | git | 4169d9fb92f313ff8e7e83d733c1ecdcc93eebd3 | Unavailable | None listed |
| 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 | affected | git | 8173f7e2ce67e6ca1d4763f3da14e5b01ce77456 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.18 | Unavailable | None listed |
| 5.10.265 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.216 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.151 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.103 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.42 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.6 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |