smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().
In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set(). smc_clc_prfx_set() is called during connect() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dev_dst_rcu() under rcu_read_lock() after kernel_getsockname(). Note that the returned value of smc_clc_prfx_set() is not used in the caller. While at it, we change the 1st arg of smc_clc_prfx_set[46]_rcu() not to touch dst there.
CVE-2025-40139
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-40139
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "a046d57da19f812216f393e7c535f5858f793ac3",
"lessThan": "5a2fccc4b32c13ddde3676f9e15e1a9baa7d6fde",
"versionType": "git"
},
{
"status": "affected",
"version": "a046d57da19f812216f393e7c535f5858f793ac3",
"lessThan": "80d1fd39f4e37d836655e9f7ffccaf78925049bf",
"versionType": "git"
},
{
"status": "affected",
"version": "a046d57da19f812216f393e7c535f5858f793ac3",
"lessThan": "956c57daba55cf9ed25d9f2512883b8a1a927599",
"versionType": "git"
},
{
"status": "affected",
"version": "a046d57da19f812216f393e7c535f5858f793ac3",
"lessThan": "0736993bfe5c7a9c744ae3fac62d769dfdae54e1",
"versionType": "git"
},
{
"status": "affected",
"version": "a046d57da19f812216f393e7c535f5858f793ac3",
"lessThan": "935d783e5de9b64587f3adb25641dd8385e64ddb",
"versionType": "git"
}
],
"programFiles": [
"net/smc/smc_clc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.187",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.156",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.3",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/smc/smc_clc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-40139
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30678 · Revision 1
- Added to Heist Feed
- Publisher date