CVE-2026-74606— eventfs: Fix use-after-free in eventfs_remove_rec()
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，已修复以下漏洞： eventfs: 修复 eventfs_remove_rec() 中的释放后使用（use-after-free）漏洞 eventfs_remove_rec() 会递归删除当前循环位置处的子节点。在递归调用返回后， 会尝试从已被移除的子节点中读取 以继续遍历。 如果 释放了最后一个引用，则 会重用 list/RCU 联合体来排队一个 SRCU 回调。在该读取操作发生前，子节点可能已经被释放。虽然 用于序列化列表更新，但它并不能保证已移除的子节点保持存活，也无法阻止 SRCU
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege EscalationAffected Version Matrix 15
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 5dfb04100326f70e3b2d2872c2476ed20b804837< b77581b25e213e83b79ce11eb30024e55ceeb3e9 |
affected |
43aa6f97c2d03a52c1ddb86768575fc84344bdbb< f161d7861a0bfdf10af6b738b3b57636204661fb |
affected | ||
43aa6f97c2d03a52c1ddb86768575fc84344bdbb< 5635211b44969f4816e29ec4d5f8665fb39535d0 |
affected | ||
43aa6f97c2d03a52c1ddb86768575fc84344bdbb< 74bb1eaf72d185a78c879eb2678ea500f82f46a8 |
affected | ||
43aa6f97c2d03a52c1ddb86768575fc84344bdbb< fd73b691702170d37d66f4b0278530cea8ed419a |
affected | ||
5a43badefe0eccca0c26144c0a44b8d417ce8103 |
affected | ||
6.6.18< 6.6.152 |
affected | ||
6.7.6< 6.8 |
affected | ||
| … +7 more rows | |||
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I. Basic Information for CVE-2026-74606
Vulnerability Information
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Vulnerability Title
eventfs: Fix use-after-free in eventfs_remove_rec()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
eventfs: Fix use-after-free in eventfs_remove_rec()
eventfs_remove_rec() recursively removes the child at the current loop
position. After the recursive call returns, list_for_each_entry() advances
by reading list.next from the removed child.
If free_ei() drops the final reference, release_ei() reuses the list/rcu
union to queue an SRCU callback. The child may be freed before that read.
The eventfs_mutex serializes list updates, but it does not keep the removed
child alive or prevent the SRCU callback from running.
Use list_for_each_entry_safe() to save the next sibling before recursively
removing the current child.
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-2026-74606
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-74606 (5)
Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total
| CVE-2026-74705 | 10.0 CRITICAL | udp: fix potential use-after-free in tunnel segmentation |
| CVE-2026-74612 | 10.0 CRITICAL | veth: fix skb length accounting after XDP frag adjustment |
| CVE-2026-74669 | 9.8 CRITICAL | ipvs: clear IPv4 options after rebasing tunnel ICMP errors |
| CVE-2026-74628 | 9.8 CRITICAL | net/x25: fix use-after-free of the socket by its timers |
| CVE-2026-74608 | 9.8 CRITICAL | smb: client: Fix use-after-free in cifs_try_adding_channels() |
| CVE-2026-74688 | 9.8 CRITICAL | sctp: clear control chunk transport if it is being removed |
| CVE-2026-74611 | 9.8 CRITICAL | tls: rx: restore msg_iter before TLS 1.3 optimistic retry |
| CVE-2026-74587 | 9.8 CRITICAL | sctp: fix use-after-free of cached ASCONF chunk |
| CVE-2026-74662 | 9.8 CRITICAL | inet: frags: publish queues before arming timer |
| CVE-2026-74588 | 9.8 CRITICAL | sctp: keep chunk->transport in step with the list it is queued on |
| CVE-2026-74727 | 9.8 CRITICAL | ovpn: skip rehash for peers already removed from by_id |
| CVE-2026-74616 | 9.8 CRITICAL | xdp: reject clones that overrun skb_shared_info tailroom |
| CVE-2026-74730 | 9.8 CRITICAL | NFS: Pin the 'struct nfs_server' during a FREE_STATEID call |
| CVE-2026-74723 | 9.8 CRITICAL | btrfs: lzo: reject inline extents without valid headers |
| CVE-2026-74597 | 9.8 CRITICAL | ip6_tunnel: clear skb2->cb[] in ip6ip6_err() |
| CVE-2026-74591 | 9.8 CRITICAL | mm/filemap: __filemap_add_folio() restore index before retrying |
| CVE-2026-74586 | 9.8 CRITICAL | sctp: clear new_transport when removing a peer |
| CVE-2026-74617 | 9.8 CRITICAL | dibs: initialise dibs->lock in dibs_dev_alloc() |
| CVE-2026-74712 | 9.3 CRITICAL | vdpa/mlx5: Fix buffer length in create_direct_keys() |
| CVE-2026-74665 | 9.1 CRITICAL | net: fix skb length accounting after generic XDP frag adjustment |
Showing top 20 of 150 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
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CVE-2026-74733
gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock -
CVE-2026-74732
drm/amd/display: Check for tg ops in dce110_set_avmute -
CVE-2026-74731
sched_ext: Skip sub-disable teardown for never-linked sub-sc -
CVE-2026-74730
NFS: Pin the 'struct nfs_server' during a FREE_STATEID call -
CVE-2026-74729
soc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_
Same vendor: Linux
-
CVE-2026-74733
gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock -
CVE-2026-74732
drm/amd/display: Check for tg ops in dce110_set_avmute -
CVE-2026-74731
sched_ext: Skip sub-disable teardown for never-linked sub-sc -
CVE-2026-74730
NFS: Pin the 'struct nfs_server' during a FREE_STATEID call -
CVE-2026-74729
soc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_
V. Comments for CVE-2026-74606
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