CVE-2025-39857 (GCVE-0-2025-39857)

Vulnerability from cvelistv5 – Published: 2025-09-19 15:26 – Updated: 2026-05-12 12:07
VLAI?
Title
net/smc: fix one NULL pointer dereference in smc_ib_is_sg_need_sync()
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0ef69e788411cba2af017db731a9fc62d255e9ac , < 0cdf1fd8fc59d44a48c694324611136910301ef9 (git)
Affected: 0ef69e788411cba2af017db731a9fc62d255e9ac , < f18d9b3abf9c6587372cc702f963a7592277ed56 (git)
Affected: 0ef69e788411cba2af017db731a9fc62d255e9ac , < eb929910bd4b4165920fa06a87b22cc6cae92e0e (git)
Affected: 0ef69e788411cba2af017db731a9fc62d255e9ac , < 34f17cbe027050b8d5316ea1b6f9bd7c378e92de (git)
Affected: 0ef69e788411cba2af017db731a9fc62d255e9ac , < ba1e9421cf1a8369d25c3832439702a015d6b5f9 (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.151 , ≤ 6.1.* (semver)
Unaffected: 6.6.105 , ≤ 6.6.* (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.16.6 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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