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CVE-2026-74394— RDMA/srpt: fix integer overflow in immediate data length check

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.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.0版本存在安全漏洞，该漏洞源于immediate data长度检查时存在整数溢出，用户控制的imm_buf->len参数未进行溢出检查，可能导致绕过边界检查。

CVSS 9.8 · Critical EPSS 0.55% · P43

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639< c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d affected
5dabcd0456d7ee17c2c7a17d7c2305444d2b9639< 3efa5301137140a3ca3677a9098c0a93a0acfd49 affected
5dabcd0456d7ee17c2c7a17d7c2305444d2b9639< 067b9556eeb007f28b7c2033b4dcde5b6d88418f affected
5dabcd0456d7ee17c2c7a17d7c2305444d2b9639< dcf7a986f377cce0749ed53f1d64195fbd5fdf91 affected
5dabcd0456d7ee17c2c7a17d7c2305444d2b9639< 07dec3f6dcb6c6cc891162d252b800eb0e6d5e8e affected
5dabcd0456d7ee17c2c7a17d7c2305444d2b9639< 65572fbd86033ae2370125593d59b8be34253aaf affected
5dabcd0456d7ee17c2c7a17d7c2305444d2b9639< 72497172a4799119a0282a5eb5e2b8ddcc821921 affected
5dabcd0456d7ee17c2c7a17d7c2305444d2b9639< eb4ecdf631fe00e8020bf461503cb9b7017ed796 affected
… +10 more rows
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I. Basic Information for CVE-2026-74394

Vulnerability Information
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Vulnerability Title
RDMA/srpt: fix integer overflow in immediate data length check
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/srpt: fix integer overflow in immediate data length check imm_buf->len is a user-controlled uint32_t received from the network. Adding it to imm_data_offset without overflow checking allows a malicious initiator to send len=0xFFFFFFFF, causing req_size to wrap around to a small value, bypassing the bounds check, and subsequently passing a ~4GB length to sg_init_one(). Use check_add_overflow() to detect wrapping before the comparison.
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 5.0版本存在安全漏洞，该漏洞源于immediate data长度检查时存在整数溢出，用户控制的imm_buf->len参数未进行溢出检查，可能导致绕过边界检查。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5dabcd0456d7ee17c2c7a17d7c2305444d2b9639 ~ c82c860f8c8e4f4f454c9f14d0ad0c0466965f7d -
Linux Linux 5.0 -

II. Public POCs for CVE-2026-74394

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III. Intelligence Information for CVE-2026-74394

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Patches & Fixes for CVE-2026-74394 (7)

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 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74394

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