can: j1939: make j1939_session_activate() fail if device is no longer registered
In the Linux kernel, the following vulnerability has been resolved: can: j1939: make j1939_session_activate() fail if device is no longer registered syzbot is still reporting unregister_netdevice: waiting for vcan0 to become free. Usage count = 2 even after commit 93a27b5891b8 ("can: j1939: add missing calls in NETDEV_UNREGISTER notification handler") was added. A debug printk() patch found that j1939_session_activate() can succeed even after j1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER) has completed. Since j1939_cancel_active_session() is processed with the session list lock held, checking ndev->reg_state in j1939_session_activate() with the session list lock held can reliably close the race window.
CVE-2025-71182
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-2025-71182
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": "9d71dd0c70099914fcd063135da3c580865e924c",
"lessThan": "ebb0dfd718dd31c8d3600612ca4b7207ec3d923a",
"versionType": "git"
},
{
"status": "affected",
"version": "9d71dd0c70099914fcd063135da3c580865e924c",
"lessThan": "c3a4316e3c746af415c0fd6c6d489ad13f53714d",
"versionType": "git"
},
{
"status": "affected",
"version": "9d71dd0c70099914fcd063135da3c580865e924c",
"lessThan": "46ca9dc978923c5e1247a9e9519240ba7ace413c",
"versionType": "git"
},
{
"status": "affected",
"version": "9d71dd0c70099914fcd063135da3c580865e924c",
"lessThan": "78d87b72cebe2a993fd5b017e9f14fb6278f2eae",
"versionType": "git"
},
{
"status": "affected",
"version": "9d71dd0c70099914fcd063135da3c580865e924c",
"lessThan": "ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536",
"versionType": "git"
},
{
"status": "affected",
"version": "9d71dd0c70099914fcd063135da3c580865e924c",
"lessThan": "79dd3f1d9dd310c2af89b09c71f34d93973b200f",
"versionType": "git"
},
{
"status": "affected",
"version": "9d71dd0c70099914fcd063135da3c580865e924c",
"lessThan": "5d5602236f5db19e8b337a2cd87a90ace5ea776d",
"versionType": "git"
}
],
"programFiles": [
"net/can/j1939/transport.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.161",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.121",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.66",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.6",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/can/j1939/transport.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-71182
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #39174 · Revision 1
- Added to Heist Feed
- Publisher date