CVE-2026-97995
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: virtio_console: do not free control-out buffers on remove __send_control_msg() publishes &portdev->cpkt as the control-out virtqueue cookie. remove_vqs() walks every virtqueue and passes leftover cookies to free_buf(), which treats them as struct port_buffer and reads sgpages. If a control message is still on c_ovq when the device is unbound, free_buf() reads past the ports_device object. KASAN reported slab-out-of-bounds in free_buf(): free_buf remove_vqs virtcons_remove unbind_store The object was the ports_device allocated in virtcons_probe(). Drain c_ovq without freeing. The packet lives in portdev and is released with it.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-25 11:17:27.750000
Last modified
2026-10-19 10:17:50.947000
View original CVE JSON
{
"id": "CVE-2026-97995",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-25T11:17:27.750",
"lastModified": "2026-10-19T10:17:50.947",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_console: do not free control-out buffers on remove\n\n__send_control_msg() publishes &portdev->cpkt as the control-out\nvirtqueue cookie. remove_vqs() walks every virtqueue and passes leftover\ncookies to free_buf(), which treats them as struct port_buffer and\nreads sgpages.\n\nIf a control message is still on c_ovq when the device is unbound,\nfree_buf() reads past the ports_device object.\n\nKASAN reported slab-out-of-bounds in free_buf():\n\n\tfree_buf\n\tremove_vqs\n\tvirtcons_remove\n\tunbind_store\n\nThe object was the ports_device allocated in virtcons_probe().\n\nDrain c_ovq without freeing. The packet lives in portdev and is released\nwith it."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/char/virtio_console.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b",
"lessThan": "b1f39c2a676698cc64c8e105e08b25111a112ec6",
"versionType": "git",
"status": "affected"
},
{
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"lessThan": "e03522a990cd2e0f1a736eaa349a9df9ab8541c3",
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"status": "affected"
},
{
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{
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{
"version": "47cb14192bcbba3f15b1c3561e05e084e56fdef6",
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},
{
"version": "6b1c41a0f7183702abb7a104c6c7e196ad69a6b3",
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{
"version": "9037306163a6ba5587e4b5ca511ac7be4fb7295b",
"versionType": "git",
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},
{
"version": "3.16.60",
"lessThan": "3.17",
"versionType": "semver",
"status": "affected"
},
{
"version": "3.18.108",
"lessThan": "3.19",
"versionType": "semver",
"status": "affected"
},
{
"version": "4.1.52",
"lessThan": "4.2",
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"status": "affected"
},
{
"version": "4.4.131",
"lessThan": "4.5",
"versionType": "semver",
"status": "affected"
},
{
"version": "4.9.98",
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"status": "affected"
},
{
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{
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}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/char/virtio_console.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.17",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.17",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.271",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.222",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.189",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.158",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.111",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.53",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.7",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}