CVE-2026-74401— dlm: fix add msg handle in send_queue ordered
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 489d8e559c6596eb08e16447d9830bc39afbe54e< ae9e534e502a0f48c12baf83608c5de0ff0eab11 | affected |
489d8e559c6596eb08e16447d9830bc39afbe54e< 6369619f1b665f12d8c99cc6ff733c64eb08b22e | affected | ||
489d8e559c6596eb08e16447d9830bc39afbe54e< 712714f818d83373847874ab0f8e426be79296cf | affected | ||
489d8e559c6596eb08e16447d9830bc39afbe54e< 4d45250b1d22960f86d83245be188b16e456218b | affected | ||
489d8e559c6596eb08e16447d9830bc39afbe54e< d2248cb70c070f8f04762872772e155b59016f17 | affected | ||
5.14 | affected | ||
< 5.14 | unaffected | ||
6.6.145≤ 6.6.* | unaffected | ||
| … +4 more rows | |||
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I. Basic Information for CVE-2026-74401
Vulnerability Information
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Vulnerability Title
dlm: fix add msg handle in send_queue ordered
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dlm: fix add msg handle in send_queue ordered In a benchmark scenario triggering a lot of requests that triggers a lot of DLM messages on the network it can be that the mh->seq is not ordered according the oldest seq number. This ordering is required by dlm_receive_ack as "before(mh->seq, seq)" will stop to check for older sequence numbers that are ordered in the tail of "node->send_queue". The side effects of not having it correct ordered regarding "before(mh->seq, seq)" are refcounting issues and use-after free. I only was able to reproduce this issue in a experimental DLM branch and a user space DLM benchmark that uses io_uring. After changing this I don't experienced any refcounting with the sending buffer issues anymore.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.14版本存在安全漏洞，该漏洞源于send_queue中消息句柄未按序列号正确排序，可能导致引用计数问题和释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-74401
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-74401 (5)
Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total
| CVE-2026-72421 | 10.0 CRITICAL | ipv4: fib: Don't ignore error route in local/main tables. |
| CVE-2026-72408 | 10.0 CRITICAL | geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint |
| CVE-2026-74309 | 10.0 CRITICAL | vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler |
| CVE-2026-72407 | 10.0 CRITICAL | geneve: validate inner network offset in geneve_gro_complete() |
| CVE-2026-74279 | 10.0 CRITICAL | crypto: cavium/cpt - fix DMA cleanup using wrong loop index |
| CVE-2026-74475 | 10.0 CRITICAL | vxlan: use neigh_ha_snapshot() in route_shortcircuit() |
| CVE-2026-74280 | 10.0 CRITICAL | crypto: marvell/octeontx - fix DMA cleanup using wrong loop index |
| CVE-2026-72493 | 9.9 CRITICAL | net: serialize netif_running() check in enqueue_to_backlog() |
| CVE-2026-74361 | 9.8 CRITICAL | nvme: fix FDP fdpcidx bounds check |
| CVE-2026-74268 | 9.8 CRITICAL | tcp: clear sock_ops cb flags before force-closing a child socket |
| CVE-2026-72064 | 9.8 CRITICAL | net: mana: Sync page pool RX frags for CPU |
| CVE-2026-72065 | 9.8 CRITICAL | net: mana: Validate the packet length reported by the NIC |
| CVE-2026-72069 | 9.8 CRITICAL | locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() |
| CVE-2026-72185 | 9.8 CRITICAL | ntfs: fix WARN_ON for resident attribute in ntfs_map_runlist_nolock() |
| CVE-2026-72249 | 9.8 CRITICAL | netfilter: flowtable: use dst in this direction when pushing IPIP header |
| CVE-2026-72494 | 9.8 CRITICAL | RDMA/irdma: Replace waitqueue and flag with completion |
| CVE-2026-72248 | 9.8 CRITICAL | netfilter: flowtable: support IPIP tunnel with direct xmit |
| CVE-2026-72491 | 9.8 CRITICAL | net/9p: fix race condition on rdma->state in trans_rdma.c |
| CVE-2026-72251 | 9.8 CRITICAL | netfilter: nf_nat_sip: reload possible stale data pointer |
| CVE-2026-74480 | 9.8 CRITICAL | net: bridge: stop fast-leave after deleting a port group |
Showing top 20 of 845 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: 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_
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-2026-74401
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