High 7.5Published Oct 4, 2025

CVE-2025-39929smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path

Updated under an hour ago (Oct 27, 2026, 11:00 PM ET)

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It affects Linux and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix smbdirect_recv_io leak in smbd_negotiate() error path During tests of another unrelated patch I was able to trigger this error: Objects remaining on __kmem_cache_shutdown()

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f198186aa9bbd60fae7a2061f4feec614d880299 before 5aa69aabcb275a8012265233c7694076ce1d9102; from f198186aa9bbd60fae7a2061f4feec614d880299 before aa4cf7615328eae44f3b4bf5f4fde3fb390c27c6; from f198186aa9bbd60fae7a2061f4feec614d880299 before 3d7c075c878ac844e33c43e506c2fa27ac7e9689; from f198186aa9bbd60fae7a2061f4feec614d880299 before e7b7a93879558e77d950f1ff9a6f3daa385b33df; from f198186aa9bbd60fae7a2061f4feec614d880299 before 922338efaad63cfe30d459dfc59f9d69ff93ded4; from f198186aa9bbd60fae7a2061f4feec614d880299 before 0991418bf98f191d0c320bd25245fcffa1998c7e; from f198186aa9bbd60fae7a2061f4feec614d880299 before daac51c7032036a0ca5f1aa419ad1b0471d1c6e0	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.5	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.16 before 6.1.154; from 6.2 before 6.6.108; from 6.7 before 6.12.49; from 6.13 before 6.16.9; 6.17; 6.17; 6.17; 6.17; and 2 more ranges	NVD

References

References

https://git.kernel.org/stable/c/5aa69aabcb275a8012265233c7694076ce1d9102
https://git.kernel.org/stable/c/aa4cf7615328eae44f3b4bf5f4fde3fb390c27c6
https://git.kernel.org/stable/c/3d7c075c878ac844e33c43e506c2fa27ac7e9689	patch
https://git.kernel.org/stable/c/e7b7a93879558e77d950f1ff9a6f3daa385b33df	patch
https://git.kernel.org/stable/c/922338efaad63cfe30d459dfc59f9d69ff93ded4	patch
https://git.kernel.org/stable/c/0991418bf98f191d0c320bd25245fcffa1998c7e	patch
https://git.kernel.org/stable/c/daac51c7032036a0ca5f1aa419ad1b0471d1c6e0	patch
https://cert-portal.siemens.com/productcert/html/ssa-082556.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.