HighFix available
net: rose: convert 'use' field to refcount_t
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths. For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues. This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.1.150, 6.12.45, 6.16.5, 6.6.104
- CVEs
- CVE-2025-39826
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 11:30 UTC · Revision 1
Source evidence
net: rose: convert 'use' field to refcount_t
core-osv · Original sourcePublished 16 Sept 2025, 13:00 UTC
In the Linux kernel, the following vulnerability has been resolved: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths. For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues. This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.
osv:CVE-2025-39826
Kernel
Fixed versions: 6.1.150, 6.6.104, 6.12.45, 6.16.5
Complete source record
{
"id": "a1df581cdf0781fa1d0ba34d727b8e3aded3927ce3a7f9cbf48e143a32fb54b7",
"url": "https://osv.dev/vulnerability/CVE-2025-39826",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "net: rose: convert 'use' field to refcount_t",
"summary": "In the Linux kernel, the following vulnerability has been resolved: net: rose: convert 'use' field to refcount_t The 'use' field in struct rose_neigh is used as a reference counter but lacks atomicity. This can lead to race conditions where a rose_neigh structure is freed while still being referenced by other code paths. For example, when rose_neigh->use becomes zero during an ioctl operation via rose_rt_ioctl(), the structure may be removed while its timer is still active, potentially causing use-after-free issues. This patch changes the type of 'use' from unsigned short to refcount_t and updates all code paths to use rose_neigh_hold() and rose_neigh_put() which operate reference counts atomically.",
"evidence": "osv:CVE-2025-39826",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
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"prerequisites": [],
"fixed_versions": [
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"value": "6.1.150",
"evidence": "/affected/1/ranges"
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{
"value": "6.6.104",
"evidence": "/affected/1/ranges"
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"evidence": "/affected/1/ranges"
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"affected_versions": []
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"severity": "high",
"structured": {
"id": "CVE-2025-39826",
"aliases": [
"CVE-2025-39826"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
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"affected": [
{
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39826.json"
}
},
{
"ranges": [
{
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"events": [
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{
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}
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}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39826.json"
}
}
],
"modified": "2026-10-28T02:30:28.146551712Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
"https://cert-portal.siemens.com/productcert/html/ssa-032379.html",
"https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
"https://git.kernel.org/stable/c/0085b250fcc79f900c82a69980ec2f3e1871823b",
"https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51",
"https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061",
"https://git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284",
"https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f",
"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39826.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-39826",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39826.json"
}
},
"related_cves": [
{
"value": "CVE-2025-39826",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 494922,
"published_at": "2025-09-16T13:00:24.618+00:00"
}