CVE-2025-39826 (GCVE-0-2025-39826)
Vulnerability from cvelistv5
Published
2025-09-16 13:00
Modified
2025-09-16 13:00
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
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|
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{
"containers": {
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{
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"programFiles": [
"include/net/rose.h",
"net/rose/af_rose.c",
"net/rose/rose_in.c",
"net/rose/rose_route.c",
"net/rose/rose_timer.c"
],
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"include/net/rose.h",
"net/rose/af_rose.c",
"net/rose/rose_in.c",
"net/rose/rose_route.c",
"net/rose/rose_timer.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.12"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.150",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.104",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.45",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17-rc4",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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}
],
"negate": false,
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}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: convert \u0027use\u0027 field to refcount_t\n\nThe \u0027use\u0027 field in struct rose_neigh is used as a reference counter but\nlacks atomicity. This can lead to race conditions where a rose_neigh\nstructure is freed while still being referenced by other code paths.\n\nFor example, when rose_neigh-\u003euse becomes zero during an ioctl operation\nvia rose_rt_ioctl(), the structure may be removed while its timer is\nstill active, potentially causing use-after-free issues.\n\nThis patch changes the type of \u0027use\u0027 from unsigned short to refcount_t and\nupdates all code paths to use rose_neigh_hold() and rose_neigh_put() which\noperate reference counts atomically."
}
],
"providerMetadata": {
"dateUpdated": "2025-09-16T13:00:24.618Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"url": "https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f"
},
{
"url": "https://git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284"
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{
"url": "https://git.kernel.org/stable/c/0085b250fcc79f900c82a69980ec2f3e1871823b"
},
{
"url": "https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51"
},
{
"url": "https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061"
}
],
"title": "net: rose: convert \u0027use\u0027 field to refcount_t",
"x_generator": {
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}
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-39826",
"datePublished": "2025-09-16T13:00:24.618Z",
"dateReserved": "2025-04-16T07:20:57.140Z",
"dateUpdated": "2025-09-16T13:00:24.618Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
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"nvd": "{\"cve\":{\"id\":\"CVE-2025-39826\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T13:16:02.290\",\"lastModified\":\"2025-09-17T14:18:55.093\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: rose: convert \u0027use\u0027 field to refcount_t\\n\\nThe \u0027use\u0027 field in struct rose_neigh is used as a reference counter but\\nlacks atomicity. This can lead to race conditions where a rose_neigh\\nstructure is freed while still being referenced by other code paths.\\n\\nFor example, when rose_neigh-\u003euse becomes zero during an ioctl operation\\nvia rose_rt_ioctl(), the structure may be removed while its timer is\\nstill active, potentially causing use-after-free issues.\\n\\nThis patch changes the type of \u0027use\u0027 from unsigned short to refcount_t and\\nupdates all code paths to use rose_neigh_hold() and rose_neigh_put() which\\noperate reference counts atomically.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0085b250fcc79f900c82a69980ec2f3e1871823b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/203e4f42596ede31498744018716a3db6dbb7f51\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d860d1faa6b2ce3becfdb8b0c2b048ad31800061\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f8c29fc437d03a98fb075c31c5be761cc8326284\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fb07156cc0742ba4e93dfcc84280c011d05b301f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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