CVE-2026-64123
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)
net: hsr: defer node table free until after RCU readers
In the Linux kernel, the following vulnerability has been resolved: net: hsr: defer node table free until after RCU readers HSR node-list and node-status generic-netlink operations run under rcu_read_lock(). They walk hsr->node_db through hsr_get_next_node() and hsr_get_node_data(), but RTM_DELLINK teardown removes the same node table with plain list_del() and frees each node immediately. That lets a generic-netlink reader hold a struct hsr_node pointer across hsr_dellink(). In a KASAN build, widening the reader window after hsr_get_next_node() obtains the node reproduces a slab-use-after-free when the reader copies node->macaddress_A; the freeing stack is hsr_del_nodes() from hsr_dellink(). Use list_del_rcu() and defer the free through the existing hsr_free_node_rcu() callback. This matches the lifetime rule used by the HSR prune paths, which already delete nodes with list_del_rcu() and call_rcu().
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) |
|---|---|---|---|---|---|
| b9a1e627405d68d475a3c1f35e685ccfb5bbe668 | affected | git | 0ea70fb46940620848c08d9d399455c9e82fecdb | Unavailable | None listed |
| b9a1e627405d68d475a3c1f35e685ccfb5bbe668 | affected | git | 8be6685cdd1255bcc85f9b59e4bfc313aefc5c1b | Unavailable | None listed |
| b9a1e627405d68d475a3c1f35e685ccfb5bbe668 | affected | git | c5580114e0492bcd2e0a37613ed4c311e3fa3d4d | Unavailable | None listed |
| b9a1e627405d68d475a3c1f35e685ccfb5bbe668 | affected | git | 7713f4aafb577ff49fa67f0488d9c7dddc64d6ce | Unavailable | None listed |
| b9a1e627405d68d475a3c1f35e685ccfb5bbe668 | affected | git | 6324423a8e6591f41a16c09a8f9a84e554ac147c | Unavailable | None listed |
| b9a1e627405d68d475a3c1f35e685ccfb5bbe668 | affected | git | 48d09dea506de667eb55f939bf98eec721effbdb | Unavailable | None listed |
| b9a1e627405d68d475a3c1f35e685ccfb5bbe668 | affected | git | 8c3af18bb0d7c921a5219194037509463eb2ffde | Unavailable | None listed |
| b9a1e627405d68d475a3c1f35e685ccfb5bbe668 | affected | git | aaec7096f9961eb223b5b149abe9495525c205d9 | Unavailable | None listed |
| 08523d5a2f4a9e4202e00d282c164d453cabe2d2 | affected | git | Unavailable | Unavailable | None listed |
| 5.2.12 | affected | semver | 5.3 | 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) |
|---|---|---|---|---|---|
| 5.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.3 | Unavailable | None listed |
| 5.10.259 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.210 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.176 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.143 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.93 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.57 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.11 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |