CVE-2026-99053— tipc: hold a reference to nodes found by link name
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 Linux 内核中，以下漏洞已得到修复： tipc：通过链路名称查找节点时持有引用 函数在释放 RCU 读锁后返回节点，但未获取该节点的引用计数。随后， 、 和 处理程序会对该节点加锁并进行访问，从而与由定时器触发的对已断开对等节点的清理操作发生竞态条件。通用 netlink 序列化机制无法排除节点定时器的影响。 以下交错执行顺序可能导致处理程序使用已被释放的节点： CPU 0：在 RCU 保护下找到节点，并释放节点的读锁； CPU 1： 清除链路并将已断开的节点从列表中移除； CPU 1：释放列表和定时器的引
Affected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 6a939f365bdb03a74b4617bdb4402fc08da088b9< b60259d4047fbb735476c729dcf9306a038b6110 |
affected |
6a939f365bdb03a74b4617bdb4402fc08da088b9< f17e70206a1e763fcca2578a8db3c4eed0f843a9 |
affected | ||
6a939f365bdb03a74b4617bdb4402fc08da088b9< 1428c5f1d346a2e1ac9156713975a72246957009 |
affected | ||
6a939f365bdb03a74b4617bdb4402fc08da088b9< 3c3b308ee6e25729a6cf09b69cdd0e093220d40b |
affected | ||
6a939f365bdb03a74b4617bdb4402fc08da088b9< 17e73bae400f6a434dc006e3bee92c94cf781954 |
affected | ||
4.19 |
affected | ||
< 4.19 |
unaffected | ||
6.6.160≤ 6.6.* |
unaffected | ||
| … +4 more rows | |||
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-99053
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
tipc: hold a reference to nodes found by link name
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
tipc: hold a reference to nodes found by link name
tipc_node_find_by_name() returns a node after dropping its RCU read lock
without taking a reference. The LINK_SET, LINK_GET and LINK_RESET_STATS
handlers then lock and access the node, racing with timer-driven cleanup of
a down peer. Generic netlink serialization does not exclude the node
timer.
The following interleaving can leave a handler using a freed node:
CPU 0: find the node under RCU and release the node read lock
CPU 1: tipc_node_timeout() clears the links and unlinks the down node
CPU 1: drop the list and timer references, queuing tipc_node_free()
CPU 0: leave the RCU read-side critical section
CPU 1: complete the grace period and free the node
CPU 0: acquire the node lock through the stale pointer
LINK_SET also uses the node's media address after releasing the node lock,
when passing queued packets to tipc_bearer_xmit().
KASAN on v7.3-rc5 reported:
BUG: KASAN: slab-use-after-free in _raw_read_lock_bh
Write of size 4 at addr ffff88807e06f008 by task poc/92
Call Trace:
_raw_read_lock_bh kernel/locking/spinlock.c:287
tipc_nl_node_set_link net/tipc/node.c:2475
genl_family_rcv_msg_doit net/netlink/genetlink.c:1114
genl_rcv_msg net/netlink/genetlink.c:1209
netlink_rcv_skb net/netlink/af_netlink.c:2575
Allocated by task 0:
tipc_node_create net/tipc/node.c:539
tipc_node_check_dest net/tipc/node.c:1196
tipc_disc_rcv net/tipc/discover.c:252
Freed by task 92:
kfree mm/slub.c:6801
rcu_core kernel/rcu/tree.c:2919
Last potentially related work creation:
__call_rcu_common.constprop.0 kernel/rcu/tree.c:3181
tipc_node_timeout net/tipc/node.c:814
Acquire a reference to the selected node with kref_get_unless_zero() before
leaving RCU, returning NULL if the node has already been released. Release
that reference on every caller exit after the last node access, including
transmission in LINK_SET. Keep the existing link lookup order and locking
so concurrent link removal still takes the existing error paths.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-99053
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-99053
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-99053 (5)
Same Patch Batch · Linux · 2026-10-23 · 218 CVEs total
| CVE-2026-98959 | 9.8 CRITICAL | btrfs: fix xattr replace when multiple xattrs are packed in the same item |
| CVE-2026-99079 | 9.8 CRITICAL | net/mlx5e: Prevent stale XSK buffer release on refill retry |
| CVE-2026-99078 | 9.8 CRITICAL | net/mlx5e: Prevent stale XSK buffer release on MPWQE refill retry |
| CVE-2026-98870 | 8.8 HIGH | ksmbd: remove stale channels from all sessions on teardown |
| CVE-2026-98980 | 8.8 HIGH | namei: don't reveal overmounted entries in refwalk |
| CVE-2026-99083 | 8.8 HIGH | ksmbd: fix heap out-of-bounds write in krb5_authenticate() |
| CVE-2026-99082 | 8.8 HIGH | KVM: x86: Use active memslots for the per-vCPU MMIO cache |
| CVE-2026-98981 | 8.8 HIGH | namespace: unhash a dentry before detaching the mounts on it |
| CVE-2026-98988 | 8.8 HIGH | namespace: keep covered mounts covered in OPEN_TREE_NAMESPACE |
| CVE-2026-98978 | 8.4 HIGH | namespace: never expire a locked mount |
| CVE-2026-99042 | 8.4 HIGH | io_uring/net: populate CONNECT filter fields for 24-byte sockaddr_in6 |
| CVE-2026-99064 | 8.1 HIGH | cipso: adjust cached option offsets when removing CIPSO |
| CVE-2026-98968 | 8.1 HIGH | amt: send the relay's General Query directly from the receive path |
| CVE-2026-98975 | 7.8 HIGH | xfs: stop exchanging reflink flags when exchanging mappings |
| CVE-2026-98889 | 7.8 HIGH | wifi: iwlwifi: mvm: fix sched scan IE sizing |
| CVE-2026-99050 | 7.8 HIGH | gpio: mpsse: fix race when arming the IRQ poll worker |
| CVE-2026-98974 | 7.8 HIGH | xfs: fix exchange-range-to-eof file size exchange |
| CVE-2026-98999 | 7.8 HIGH | drm/xe: Fix stale pinned_link entry when fb-pin performs the final unpin |
| CVE-2026-99056 | 7.8 HIGH | strparser: make sure __strp_recv isn't running before tearing down the parser |
| CVE-2026-98976 | 7.8 HIGH | namespace: keep the lock on a mount that a propagated copy is moved beneath |
Showing top 20 of 218 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-99087
dm-integrity: fix NULL pointer dereference when the 'R' flag -
CVE-2026-99086
dm-integrity: validate the superblock on resume -
CVE-2026-99084
readdir: take no inode lock on an immutable directory -
CVE-2026-99085
sched_ext: Fix CPU hotplug hang when a dying CPU's tasks sit -
CVE-2026-99083
ksmbd: fix heap out-of-bounds write in krb5_authenticate()
Same vendor: Linux
-
CVE-2026-99087
dm-integrity: fix NULL pointer dereference when the 'R' flag -
CVE-2026-99086
dm-integrity: validate the superblock on resume -
CVE-2026-99084
readdir: take no inode lock on an immutable directory -
CVE-2026-99085
sched_ext: Fix CPU hotplug hang when a dying CPU's tasks sit -
CVE-2026-99083
ksmbd: fix heap out-of-bounds write in krb5_authenticate()