Medium severity · published Jan 31, 2026
CVE-2025-71186
dmaengine: stm32: dmamux: fix device leak on route allocation
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
dmaengine: stm32: dmamux: fix device leak on route allocation
Make sure to drop the reference taken when looking up the DMA mux
platform device during route allocation.
Note that holding a reference to a device does not prevent its driver
data from going away so there is no point in keeping the reference.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
4.15.1 before 5.10.249; 5.11 before 5.15.199; 5.16 before 6.1.162; 6.2 before 6.6.122; 6.7 before 6.12.67; 6.13 before 6.18.7; +9 more · source: NVD
LI
Linux · Linux
df7e762db5f6c8dbd9e480f1c9ef9851de346657 before 3b42020e6790a5e19b36c187ed5b488a5716f97f; df7e762db5f6c8dbd9e480f1c9ef9851de346657 before 6393da54dcb3488c080a183c4182ddec71ba8d7f; df7e762db5f6c8dbd9e480f1c9ef9851de346657 before 1dda2a32303df0091896b01a9d09070d61fa344c; df7e762db5f6c8dbd9e480f1c9ef9851de346657 before 1a179ac01ff3993ab97e33cc77c316ed7415cda1; df7e762db5f6c8dbd9e480f1c9ef9851de346657 before 2fb10259d4efb4367787b5ae9c94192e8a91c648; df7e762db5f6c8dbd9e480f1c9ef9851de346657 before 3ef52d31cce8ba816739085a61efe07b63c6cf27; +2 more · source: vendor
RR
RUGGEDCOM RST2428P · Siemens
before V4.0 · source: CISA
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.7; V3.1.6; V3.1.7 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.6; V3.1.7; V3.1.6; V3.1.7 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.6; V3.1.7 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-71186
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-71186
Patch
https://git.kernel.org/stable/c/1a179ac01ff3993ab97e33cc77c316ed7415cda1
Patch
https://git.kernel.org/stable/c/1dda2a32303df0091896b01a9d09070d61fa344c
Patch
https://git.kernel.org/stable/c/2fb10259d4efb4367787b5ae9c94192e8a91c648
Patch
https://git.kernel.org/stable/c/3b42020e6790a5e19b36c187ed5b488a5716f97f
Patch
https://git.kernel.org/stable/c/3ef52d31cce8ba816739085a61efe07b63c6cf27
Patch
https://git.kernel.org/stable/c/6393da54dcb3488c080a183c4182ddec71ba8d7f
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