Trending
CVE-2025-39857

CVE detail

CVE-2025-39857

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.

CVSS 7.5 · HighBuzz score 32.3

Buzz score

Why this CVE is surfacing

Buzz score total 32.3

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 20.8 · diversity 11.5 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

20.8

7 evidence mentions in the snapshot

Diversity score

11.5

3 sources across 2 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

7 source links · newest first

https://cert-portal.siemens.com/productcert/html/ssa-032379.htmlcert-portal.siemens.com
No excerpt available.
Vendor Advisorycert-portal.siemens.comSep 19, 2025, 4:15 PM
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmllists.debian.org
No excerpt available.
Vendor Advisorylists.debian.orgSep 19, 2025, 4:15 PM
https://git.kernel.org/stable/c/f18d9b3abf9c6587372cc702f963a7592277ed56git.kernel.org
No excerpt available.
Exploitgit.kernel.orgSep 19, 2025, 4:15 PM
https://git.kernel.org/stable/c/eb929910bd4b4165920fa06a87b22cc6cae92e0egit.kernel.org
No excerpt available.
Exploitgit.kernel.orgSep 19, 2025, 4:15 PM
https://git.kernel.org/stable/c/ba1e9421cf1a8369d25c3832439702a015d6b5f9git.kernel.org
No excerpt available.
Exploitgit.kernel.orgSep 19, 2025, 4:15 PM
https://git.kernel.org/stable/c/34f17cbe027050b8d5316ea1b6f9bd7c378e92degit.kernel.org
No excerpt available.
Exploitgit.kernel.orgSep 19, 2025, 4:15 PM
https://git.kernel.org/stable/c/0cdf1fd8fc59d44a48c694324611136910301ef9git.kernel.org
No excerpt available.
Exploitgit.kernel.orgSep 19, 2025, 4:15 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

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CVE-2025-39865
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CVE-2025-39846
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CVE-2025-39838
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External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2025-39857.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:o:debian:debian_linuxSearch this product on Shodan
cpe:2.3:o:linux:linux_kernelSearch this product on Shodan

Exact CVE query

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Metadata

Canonical fields

NVD status

Modified

Published

Sep 19, 2025

Modified

Jul 30, 2026

Official record

Authoritative NVD record

CVSS vector

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

CWE IDs

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Network. The vulnerable system can be reached across network boundaries.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Unchanged. Impacts remain within the vulnerable security authority.
Confidentiality Impact (C): None. There is no direct impact to this security property.
Integrity Impact (I): None. There is no direct impact to this security property.
Availability Impact (A): High. There is a total or serious impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses