CVE-2026-93134 (GCVE-0-2026-93134)
Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-09-17 16:11
VLAI
EPSS
VEX
Title
printk: Fix possible console use-after-free
Summary
In the Linux kernel, the following vulnerability has been resolved:
printk: Fix possible console use-after-free
When emitting a record via legacy printing, it is possible that a handover
to another legacy printing context occurs. When a context has performed a
handover, the console SRCU read lock is released and the pointer to the
console struct might now be invalid. Therefore, after calling
nbcon_legacy_emit_next_record() or console_emit_next_record(), it is
necessary to check if a handover occurred _before_ further @con usage.
Sashiko pointed out that console_flush_one_record() was not doing this.
In console_flush_one_record(), after emitting a record, move the further
usage of @con after the handover check.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
c158834b223fbfab3a14855ac203b8d9cddbbefd , < f0104a7b730de32eefb3d4a27279592b5504ad59
(git)
Affected: c158834b223fbfab3a14855ac203b8d9cddbbefd , < fbf9bb81b21537ede387a31cc586f1d2ce66a74e (git) Affected: c158834b223fbfab3a14855ac203b8d9cddbbefd , < 8f194dee0c0d1223255bae1429e1939882f540fc (git) Affected: c158834b223fbfab3a14855ac203b8d9cddbbefd , < 36630cafbeede0b64c370edb2f7b4094327ee1e0 (git) |
guessed | |
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"kernel/printk/printk.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "f0104a7b730de32eefb3d4a27279592b5504ad59",
"status": "affected",
"version": "c158834b223fbfab3a14855ac203b8d9cddbbefd",
"versionType": "git"
},
{
"lessThan": "fbf9bb81b21537ede387a31cc586f1d2ce66a74e",
"status": "affected",
"version": "c158834b223fbfab3a14855ac203b8d9cddbbefd",
"versionType": "git"
},
{
"lessThan": "8f194dee0c0d1223255bae1429e1939882f540fc",
"status": "affected",
"version": "c158834b223fbfab3a14855ac203b8d9cddbbefd",
"versionType": "git"
},
{
"lessThan": "36630cafbeede0b64c370edb2f7b4094327ee1e0",
"status": "affected",
"version": "c158834b223fbfab3a14855ac203b8d9cddbbefd",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"kernel/printk/printk.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"lessThan": "6.12",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.110",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.52",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2.6",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.3-rc1",
"versionStartIncluding": "6.12",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nprintk: Fix possible console use-after-free\n\nWhen emitting a record via legacy printing, it is possible that a handover\nto another legacy printing context occurs. When a context has performed a\nhandover, the console SRCU read lock is released and the pointer to the\nconsole struct might now be invalid. Therefore, after calling\nnbcon_legacy_emit_next_record() or console_emit_next_record(), it is\nnecessary to check if a handover occurred _before_ further @con usage.\n\nSashiko pointed out that console_flush_one_record() was not doing this.\n\nIn console_flush_one_record(), after emitting a record, move the further\nusage of @con after the handover check."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-17T16:11:36.077Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f0104a7b730de32eefb3d4a27279592b5504ad59"
},
{
"url": "https://git.kernel.org/stable/c/fbf9bb81b21537ede387a31cc586f1d2ce66a74e"
},
{
"url": "https://git.kernel.org/stable/c/8f194dee0c0d1223255bae1429e1939882f540fc"
},
{
"url": "https://git.kernel.org/stable/c/36630cafbeede0b64c370edb2f7b4094327ee1e0"
}
],
"title": "printk: Fix possible console use-after-free",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-93134",
"datePublished": "2026-09-17T16:11:36.077Z",
"dateReserved": "2026-09-17T16:02:15.087Z",
"dateUpdated": "2026-09-17T16:11:36.077Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-93134\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-17T17:18:08.260\",\"lastModified\":\"2026-09-17T17:18:08.260\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nprintk: Fix possible console use-after-free\\n\\nWhen emitting a record via legacy printing, it is possible that a handover\\nto another legacy printing context occurs. When a context has performed a\\nhandover, the console SRCU read lock is released and the pointer to the\\nconsole struct might now be invalid. Therefore, after calling\\nnbcon_legacy_emit_next_record() or console_emit_next_record(), it is\\nnecessary to check if a handover occurred _before_ further @con usage.\\n\\nSashiko pointed out that console_flush_one_record() was not doing this.\\n\\nIn console_flush_one_record(), after emitting a record, move the further\\nusage of @con after the handover check.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/printk/printk.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"c158834b223fbfab3a14855ac203b8d9cddbbefd\",\"lessThan\":\"f0104a7b730de32eefb3d4a27279592b5504ad59\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c158834b223fbfab3a14855ac203b8d9cddbbefd\",\"lessThan\":\"fbf9bb81b21537ede387a31cc586f1d2ce66a74e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c158834b223fbfab3a14855ac203b8d9cddbbefd\",\"lessThan\":\"8f194dee0c0d1223255bae1429e1939882f540fc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c158834b223fbfab3a14855ac203b8d9cddbbefd\",\"lessThan\":\"36630cafbeede0b64c370edb2f7b4094327ee1e0\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/printk/printk.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.110\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.52\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.6\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/36630cafbeede0b64c370edb2f7b4094327ee1e0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8f194dee0c0d1223255bae1429e1939882f540fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f0104a7b730de32eefb3d4a27279592b5504ad59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fbf9bb81b21537ede387a31cc586f1d2ce66a74e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-09-18T00:11:45Z",
"cve": "CVE-2026-93134",
"id": "CVE-2026-93134",
"initial_release_date": "2026-09-18T00:11:45Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-93134",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93134.json",
"version": "2"
}
}
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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.
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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