CVE-2025-40139

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Source
https://cve.org/CVERecord?id=CVE-2025-40139
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40139.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-40139
Downstream
Related
Published
2025-11-12T10:23:24.216Z
Modified
2026-03-20T12:43:11.345227Z
Summary
smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().
Details

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

smc: Use _skdstget() and dstdevrcu() in in smcclcprfxset().

smcclcprfx_set() is called during connect() and not under RCU nor RTNL.

Using skdstget(sk)->dev could trigger UAF.

Let's use _skdstget() and devdstrcu() under rcureadlock() after kernelgetsockname().

Note that the returned value of smcclcprfx_set() is not used in the caller.

While at it, we change the 1st arg of smcclcprfx_set[46]_rcu() not to touch dst there.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40139.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
a046d57da19f812216f393e7c535f5858f793ac3
Fixed
0736993bfe5c7a9c744ae3fac62d769dfdae54e1
Fixed
935d783e5de9b64587f3adb25641dd8385e64ddb

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40139.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.11.0
Fixed
6.17.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40139.json"