printk: Fix possible console use-after-free
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.
CVE-2026-93134
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-2026-93134
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": "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"
}
],
"programFiles": [
"kernel/printk/printk.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/printk/printk.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93134
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #37855 · Revision 1
- Added to Heist Feed
- Publisher date