CVE-2025-39857

MediumCVSS 5.5/10Last modified Oct 19, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

net/smc: fix one NULL pointer dereference in smc_ib_is_sg_need_sync()

BUG: kernel NULL pointer dereference, address: 00000000000002ec PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP PTI CPU: 28 UID: 0 PID: 343 Comm: kworker/28:1 Kdump: loaded Tainted: G OE 6.17.0-rc2+ #9 NONE Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 Workqueue: smc_hs_wq smc_listen_work [smc] RIP: 0010:smc_ib_is_sg_need_sync+0x9e/0xd0 [smc] ... Call Trace: <TASK> smcr_buf_map_link+0x211/0x2a0 [smc] __smc_buf_create+0x522/0x970 [smc] smc_buf_create+0x3a/0x110 [smc] smc_find_rdma_v2_device_serv+0x18f/0x240 [smc] ? smc_vlan_by_tcpsk+0x7e/0xe0 [smc] smc_listen_find_device+0x1dd/0x2b0 [smc] smc_listen_work+0x30f/0x580 [smc] process_one_work+0x18c/0x340 worker_thread+0x242/0x360 kthread+0xe7/0x220 ret_from_fork+0x13a/0x160 ret_from_fork_asm+0x1a/0x30 </TASK>

If the software RoCE device is used, ibdev->dma_device is a null pointer. As a result, the problem occurs. Null pointer detection is added to prevent problems.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
LinuxLinux>= 0ef69e788411cba2af017db731a9fc62d255e9ac, < 0cdf1fd8fc59d44a48c694324611136910301ef9; >= 0ef69e788411cba2af017db731a9fc62d255e9ac, < f18d9b3abf9c6587372cc702f963a7592277ed56; >= 0ef69e788411cba2af017db731a9fc62d255e9ac, < eb929910bd4b4165920fa06a87b22cc6cae92e0e; >= 0ef69e788411cba2af017db731a9fc62d255e9ac, < 34f17cbe027050b8d5316ea1b6f9bd7c378e92de; >= 0ef69e788411cba2af017db731a9fc62d255e9ac, < ba1e9421cf1a8369d25c3832439702a015d6b5f9
LinuxLinux6.0
SiemensSIMATIC CN 4100< V5.0

References

Timeline

Published
Sep 19, 2025
Last modified
Oct 19, 2026
NVD status
Modified

Related CVEs from 2025

CVE-2025-398585.5In the Linux kernel, the following vulnerability has been resolved: eth: mlx4: Fix IS_ERR() vs NULL check bug in mlx4_en_create_rx_ring ReCVE-2025-398597.8In the Linux kernel, the following vulnerability has been resolved: ptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog The ptp_CVE-2025-39867.5A vulnerability was found in Apereo CAS 5.2.6. It has been declared as problematic. This vulnerability affects unknown code of the file cas-CVE-2025-398607.8In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix use-after-free in l2cap_sock_cleanup_listen() syzbot reCVE-2025-398617.8In the Linux kernel, the following vulnerability has been resolved: Bluetooth: vhci: Prevent use-after-free by removing debugfs files earlyCVE-2025-398627.8In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: fix list corruption after hardware restart Since sCVE-2025-398637.8In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: fix use-after-free when rescheduling brcmf_btcoex_info CVE-2025-398647.8In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: fix use-after-free in cmp_bss() Following bss_free() qCVE-2025-398655.5In the Linux kernel, the following vulnerability has been resolved: tee: fix NULL pointer dereference in tee_shm_put tee_shm_put have NULLCVE-2025-398667.8In the Linux kernel, the following vulnerability has been resolved: fs: writeback: fix use-after-free in __mark_inode_dirty() An use-afterCVE-2025-398687.8In the Linux kernel, the following vulnerability has been resolved: erofs: fix runtime warning on truncate_folio_batch_exceptionals() CommCVE-2025-398697.1In the Linux kernel, the following vulnerability has been resolved: dmaengine: ti: edma: Fix memory allocation size for queue_priority_map
CVE-2025-39857: Medium severity, CVSS 5.5 | Vulnix