CVE-2026-97919 (GCVE-0-2026-97919)
Vulnerability from cvelistv5 – Published: 2026-09-25 10:22 – Updated: 2026-10-21 12:53
VLAI
EPSS
VEX
Title
tracing: Take the reference before publishing the named histogram trigger
Summary
In the Linux kernel, the following vulnerability has been resolved:
tracing: Take the reference before publishing the named histogram trigger
event_hist_trigger_named_init() puts the trigger on the global
named_triggers list and only then takes the reference on the trigger it
shares its histogram with:
data->ref++;
save_named_trigger(data->named_data->name, data);
ret = event_hist_trigger_init(data->named_data);
if (ret < 0) {
kfree(data->cmd_ops);
data->cmd_ops = &trigger_hist_cmd;
}
return ret;
event_hist_trigger_init() fails when alloc_hist_pad() cannot allocate, and
nothing takes the trigger back off the list on the way out.
event_hist_trigger_parse() frees it, and the next lookup by name reads the
freed object:
BUG: KASAN: slab-use-after-free in find_named_trigger+0xac/0xc0
Read of size 8 at addr ffff888009346860 by task init/1
find_named_trigger+0xac/0xc0
hist_register_trigger+0xc1/0xa00
event_hist_trigger_parse+0x3146/0x6af0
event_trigger_write+0xce/0x160
Freed by task 67:
kfree+0x154/0x420
trigger_kthread_fn+0xfd/0x160
Do the reference first and publish once it has succeeded, so that nothing
which can fail runs after the trigger becomes findable.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ac7ab38c271ba2edaeb0dc35b200ec13339776ae , < e5c5dad169fb569161d3eed6c3f6a59e65db1830
(git)
Affected: e53a8dcd36b9ebc9229450eb594ae20e0b2ae0fd , < b6fb2f5370a9a6aec325ab2db1ca3d1a881499b8 (git) Affected: 7ab0fc61ce73040f89b12d76a8279995ec283541 , < 2ffaade3611bd9501bc0b9d5d19fc75bfee7a16b (git) Affected: 7ab0fc61ce73040f89b12d76a8279995ec283541 , < 91c15cdda6033e2439f5975b938754152f3d6e38 (git) Affected: 7ab0fc61ce73040f89b12d76a8279995ec283541 , < 0fe23b8eaba0d3372c66b7b31204408da0715edc (git) Affected: 740dab2338f70d93aa8235db5a9541d846d7b21c (git) Affected: 6.6.94 , < 6.6.160 (semver) Affected: 6.12.34 , < 6.12.112 (semver) Affected: 6.15.3 , < 6.16 (semver) |
guessed | |
| Linux | Linux |
Affected:
6.16
Unaffected: 0 , < 6.16 (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix) |
guessed |
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},
{
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"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.6.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.112",
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},
{
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"version": "6.18.53",
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},
{
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"version": "7.2.7",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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},
{
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},
{
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}
],
"negate": false,
"operator": "OR"
}
]
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Take the reference before publishing the named histogram trigger\n\nevent_hist_trigger_named_init() puts the trigger on the global\nnamed_triggers list and only then takes the reference on the trigger it\nshares its histogram with:\n\n\tdata-\u003eref++;\n\n\tsave_named_trigger(data-\u003enamed_data-\u003ename, data);\n\n\tret = event_hist_trigger_init(data-\u003enamed_data);\n\tif (ret \u003c 0) {\n\t\tkfree(data-\u003ecmd_ops);\n\t\tdata-\u003ecmd_ops = \u0026trigger_hist_cmd;\n\t}\n\n\treturn ret;\n\nevent_hist_trigger_init() fails when alloc_hist_pad() cannot allocate, and\nnothing takes the trigger back off the list on the way out.\nevent_hist_trigger_parse() frees it, and the next lookup by name reads the\nfreed object:\n\n BUG: KASAN: slab-use-after-free in find_named_trigger+0xac/0xc0\n Read of size 8 at addr ffff888009346860 by task init/1\n find_named_trigger+0xac/0xc0\n hist_register_trigger+0xc1/0xa00\n event_hist_trigger_parse+0x3146/0x6af0\n event_trigger_write+0xce/0x160\n Freed by task 67:\n kfree+0x154/0x420\n trigger_kthread_fn+0xfd/0x160\n\nDo the reference first and publish once it has succeeded, so that nothing\nwhich can fail runs after the trigger becomes findable."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-21T12:53:38.904Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/e5c5dad169fb569161d3eed6c3f6a59e65db1830"
},
{
"url": "https://git.kernel.org/stable/c/b6fb2f5370a9a6aec325ab2db1ca3d1a881499b8"
},
{
"url": "https://git.kernel.org/stable/c/2ffaade3611bd9501bc0b9d5d19fc75bfee7a16b"
},
{
"url": "https://git.kernel.org/stable/c/91c15cdda6033e2439f5975b938754152f3d6e38"
},
{
"url": "https://git.kernel.org/stable/c/0fe23b8eaba0d3372c66b7b31204408da0715edc"
}
],
"title": "tracing: Take the reference before publishing the named histogram trigger",
"x_generator": {
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}
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"cveId": "CVE-2026-97919",
"datePublished": "2026-09-25T10:22:39.829Z",
"dateReserved": "2026-09-25T10:18:58.202Z",
"dateUpdated": "2026-10-21T12:53:38.904Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"cve": "CVE-2026-97919",
"date": "2026-11-14",
"epss": "0.00206",
"percentile": "0.10776"
},
"microsoft_vex": {
"current_release_date": "2026-10-24T14:46:24.000Z",
"cve": "CVE-2026-97919",
"id": "msrc_CVE-2026-97919",
"initial_release_date": "2026-09-27T23:36:32.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"product_status:under_investigation": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "tracing: Take the reference before publishing the named histogram trigger",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-97919.json",
"version": "3"
},
"nvd": {
"cve": {
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{
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"versions": [
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Take the reference before publishing the named histogram trigger\n\nevent_hist_trigger_named_init() puts the trigger on the global\nnamed_triggers list and only then takes the reference on the trigger it\nshares its histogram with:\n\n\tdata-\u003eref++;\n\n\tsave_named_trigger(data-\u003enamed_data-\u003ename, data);\n\n\tret = event_hist_trigger_init(data-\u003enamed_data);\n\tif (ret \u003c 0) {\n\t\tkfree(data-\u003ecmd_ops);\n\t\tdata-\u003ecmd_ops = \u0026trigger_hist_cmd;\n\t}\n\n\treturn ret;\n\nevent_hist_trigger_init() fails when alloc_hist_pad() cannot allocate, and\nnothing takes the trigger back off the list on the way out.\nevent_hist_trigger_parse() frees it, and the next lookup by name reads the\nfreed object:\n\n BUG: KASAN: slab-use-after-free in find_named_trigger+0xac/0xc0\n Read of size 8 at addr ffff888009346860 by task init/1\n find_named_trigger+0xac/0xc0\n hist_register_trigger+0xc1/0xa00\n event_hist_trigger_parse+0x3146/0x6af0\n event_trigger_write+0xce/0x160\n Freed by task 67:\n kfree+0x154/0x420\n trigger_kthread_fn+0xfd/0x160\n\nDo the reference first and publish once it has succeeded, so that nothing\nwhich can fail runs after the trigger becomes findable."
}
],
"id": "CVE-2026-97919",
"lastModified": "2026-10-21T13:21:16.177",
"metrics": {},
"published": "2026-09-25T11:17:18.923",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/0fe23b8eaba0d3372c66b7b31204408da0715edc"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2ffaade3611bd9501bc0b9d5d19fc75bfee7a16b"
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-11-06T02:32:39+00:00",
"cve": "CVE-2026-97919",
"id": "CVE-2026-97919",
"initial_release_date": "2026-09-25T00:00:00+00:00",
"product_status:known_affected": "1",
"product_status:known_not_affected": "201",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: tracing: Take the reference before publishing the named histogram trigger",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97919.json",
"version": "3"
}
}
}
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| Author | Source | Type | Date | Other |
|---|
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.