net/af_iucv: fix NULL deref in afiucv_hs_callback_syn()
In the Linux kernel, the following vulnerability has been resolved: net/af_iucv: fix NULL deref in afiucv_hs_callback_syn() afiucv_hs_callback_syn() allocates the child socket with GFP_ATOMIC. If the allocation fails, nsk is NULL. The connection-refused path is entered when the listen state check fails, the accept backlog is full, or nsk is NULL. The code unconditionally calls iucv_sock_kill(nsk) in that path. iucv_sock_kill() does not accept a NULL socket pointer and immediately dereferences sk via sock_flag(sk, SOCK_ZAPPED). When nsk is NULL, calling iucv_sock_kill(nsk) results in a NULL pointer dereference. Only call iucv_sock_kill() when a child socket was successfully allocated.
CVE-2026-68141
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-2026-68141
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": "3881ac441f642d56503818123446f7298442236b",
"lessThan": "6a1eb5b46c19073f8153b7e2c19b408cf353aaf1",
"versionType": "git"
},
{
"status": "affected",
"version": "3881ac441f642d56503818123446f7298442236b",
"lessThan": "c0b6e2ae90613c2fea7eaf3faa20985c6c2a1953",
"versionType": "git"
},
{
"status": "affected",
"version": "3881ac441f642d56503818123446f7298442236b",
"lessThan": "07e21deb3664001995e0a456dd627ab7dbe127ec",
"versionType": "git"
},
{
"status": "affected",
"version": "3881ac441f642d56503818123446f7298442236b",
"lessThan": "8bb111f87ded6acb9837ec9b45d6f02cda94c51f",
"versionType": "git"
},
{
"status": "affected",
"version": "3881ac441f642d56503818123446f7298442236b",
"lessThan": "46453b16f38ec7147351f7447e2aec6ea330f7b3",
"versionType": "git"
},
{
"status": "affected",
"version": "3881ac441f642d56503818123446f7298442236b",
"lessThan": "33736ff5e7c97d3348ce812e8bd2e125d840743c",
"versionType": "git"
},
{
"status": "affected",
"version": "3881ac441f642d56503818123446f7298442236b",
"lessThan": "0e857185591fe79934427c9c0c1c31dc776be134",
"versionType": "git"
},
{
"status": "affected",
"version": "3881ac441f642d56503818123446f7298442236b",
"lessThan": "47a5116e56a6b6fe1e909f244e39cd0fc26ceee4",
"versionType": "git"
}
],
"programFiles": [
"net/iucv/af_iucv.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/iucv/af_iucv.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68141
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41132 · Revision 1
- Added to Heist Feed
- Publisher date