CVE-2024-26615— net/smc: fix illegal rmb_desc access in SMC-D connection dump
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在转储 SMC-D 连接时导致 rmb_desc 非法访问。
Possible ATT&CK Techniques 1 AI
T1083 · File and Directory DiscoveryAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d< 27aea64838914c6122db5b8bd4bed865c9736f22 |
affected |
4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d< 1fea9969b81c67d0cb1611d1b8b7d19049d937be |
affected | ||
4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d< 5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6d |
affected | ||
4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d< 68b888d51ac82f2b96bf5e077a31d76afcdef25a |
affected | ||
4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d< 6994dba06321e3c48fdad0ba796a063d9d82183a |
affected | ||
4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d< a164c2922675d7051805cdaf2b07daffe44f20d9 |
affected | ||
4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d< 8f3f9186e5bb96a9c9654c41653210e3ea7e48a6 |
affected | ||
4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d< dbc153fd3c142909e564bb256da087e13fbf239c |
affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2024-26615
Vulnerability Information
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Vulnerability Title
net/smc: fix illegal rmb_desc access in SMC-D connection dump
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix illegal rmb_desc access in SMC-D connection dump
A crash was found when dumping SMC-D connections. It can be reproduced
by following steps:
- run nginx/wrk test:
smc_run nginx
smc_run wrk -t 16 -c 1000 -d <duration> -H 'Connection: Close' <URL>
- continuously dump SMC-D connections in parallel:
watch -n 1 'smcss -D'
BUG: kernel NULL pointer dereference, address: 0000000000000030
CPU: 2 PID: 7204 Comm: smcss Kdump: loaded Tainted: G E 6.7.0+ #55
RIP: 0010:__smc_diag_dump.constprop.0+0x5e5/0x620 [smc_diag]
Call Trace:
<TASK>
? __die+0x24/0x70
? page_fault_oops+0x66/0x150
? exc_page_fault+0x69/0x140
? asm_exc_page_fault+0x26/0x30
? __smc_diag_dump.constprop.0+0x5e5/0x620 [smc_diag]
? __kmalloc_node_track_caller+0x35d/0x430
? __alloc_skb+0x77/0x170
smc_diag_dump_proto+0xd0/0xf0 [smc_diag]
smc_diag_dump+0x26/0x60 [smc_diag]
netlink_dump+0x19f/0x320
__netlink_dump_start+0x1dc/0x300
smc_diag_handler_dump+0x6a/0x80 [smc_diag]
? __pfx_smc_diag_dump+0x10/0x10 [smc_diag]
sock_diag_rcv_msg+0x121/0x140
? __pfx_sock_diag_rcv_msg+0x10/0x10
netlink_rcv_skb+0x5a/0x110
sock_diag_rcv+0x28/0x40
netlink_unicast+0x22a/0x330
netlink_sendmsg+0x1f8/0x420
__sock_sendmsg+0xb0/0xc0
____sys_sendmsg+0x24e/0x300
? copy_msghdr_from_user+0x62/0x80
___sys_sendmsg+0x7c/0xd0
? __do_fault+0x34/0x160
? do_read_fault+0x5f/0x100
? do_fault+0xb0/0x110
? __handle_mm_fault+0x2b0/0x6c0
__sys_sendmsg+0x4d/0x80
do_syscall_64+0x69/0x180
entry_SYSCALL_64_after_hwframe+0x6e/0x76
It is possible that the connection is in process of being established
when we dump it. Assumed that the connection has been registered in a
link group by smc_conn_create() but the rmb_desc has not yet been
initialized by smc_buf_create(), thus causing the illegal access to
conn->rmb_desc. So fix it by checking before dump.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在转储 SMC-D 连接时导致 rmb_desc 非法访问。
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-2024-26615
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Mailing List Discussions for CVE-2024-26615 (2)
Other References for CVE-2024-26615 (6)
Same Patch Batch · Linux · 2024-02-29 · 53 CVEs total
| CVE-2023-52480 | 9.8 CRITICAL | ksmbd: fix race condition between session lookup and expire |
| CVE-2023-52478 | 8.8 HIGH | HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect |
| CVE-2023-52479 | 8.8 HIGH | ksmbd: fix uaf in smb20_oplock_break_ack |
| CVE-2024-26620 | 8.2 HIGH | s390/vfio-ap: always filter entire AP matrix |
| CVE-2021-47068 | 7.8 HIGH | net/nfc: fix use-after-free llcp_sock_bind/connect |
| CVE-2023-52491 | 7.8 HIGH | media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_ |
| CVE-2024-26608 | 7.8 HIGH | ksmbd: fix global oob in ksmbd_nl_policy |
| CVE-2023-52486 | 7.8 HIGH | drm: Don't unref the same fb many times by mistake due to deadlock handling |
| CVE-2024-26610 | 7.8 HIGH | wifi: iwlwifi: fix a memory corruption |
| CVE-2024-26614 | 7.8 HIGH | tcp: make sure init the accept_queue's spinlocks once |
| CVE-2024-26617 | 7.8 HIGH | fs/proc/task_mmu: move mmu notification mechanism inside mm lock |
| CVE-2023-52483 | 7.8 HIGH | mctp: perform route lookups under a RCU read-side lock |
| CVE-2021-47060 | 7.8 HIGH | KVM: Stop looking for coalesced MMIO zones if the bus is destroyed |
| CVE-2021-47061 | 7.8 HIGH | KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU |
| CVE-2024-26611 | 7.5 HIGH | xsk: fix usage of multi-buffer BPF helpers for ZC XDP |
| CVE-2021-47066 | 7.1 HIGH | async_xor: increase src_offs when dropping destination page |
| CVE-2023-52497 | 7.1 HIGH | erofs: fix lz4 inplace decompression |
| CVE-2021-47055 | 7.1 HIGH | mtd: require write permissions for locking and badblock ioctls |
| CVE-2021-47058 | regmap: set debugfs_name to NULL after it is freed | |
| CVE-2023-52477 | usb: hub: Guard against accesses to uninitialized BOS descriptors |
Showing top 20 of 53 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
V. Comments for CVE-2024-26615
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