FKIE_CVE-2023-54198
Vulnerability from fkie_nvd - Published: 2025-12-30 13:16 - Updated: 2026-08-04 11:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
tty: fix out-of-bounds access in tty_driver_lookup_tty()
When specifying an invalid console= device like console=tty3270,
tty_driver_lookup_tty() returns the tty struct without checking
whether index is a valid number.
To reproduce:
qemu-system-x86_64 -enable-kvm -nographic -serial mon:stdio \
-kernel ../linux-build-x86/arch/x86/boot/bzImage \
-append "console=ttyS0 console=tty3270"
This crashes with:
[ 0.770599] BUG: kernel NULL pointer dereference, address: 00000000000000ef
[ 0.771265] #PF: supervisor read access in kernel mode
[ 0.771773] #PF: error_code(0x0000) - not-present page
[ 0.772609] Oops: 0000 [#1] PREEMPT SMP PTI
[ 0.774878] RIP: 0010:tty_open+0x268/0x6f0
[ 0.784013] chrdev_open+0xbd/0x230
[ 0.784444] ? cdev_device_add+0x80/0x80
[ 0.784920] do_dentry_open+0x1e0/0x410
[ 0.785389] path_openat+0xca9/0x1050
[ 0.785813] do_filp_open+0xaa/0x150
[ 0.786240] file_open_name+0x133/0x1b0
[ 0.786746] filp_open+0x27/0x50
[ 0.787244] console_on_rootfs+0x14/0x4d
[ 0.787800] kernel_init_freeable+0x1e4/0x20d
[ 0.788383] ? rest_init+0xc0/0xc0
[ 0.788881] kernel_init+0x11/0x120
[ 0.789356] ret_from_fork+0x22/0x30
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/tty/tty_io.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "3df6f492f500a16c231f07ccc6f6ed1302caddf9",
"status": "affected",
"version": "99f1fe189daf8e99a847e420567e49dd7ee2aae7",
"versionType": "git"
},
{
"lessThan": "b79109d6470aaae7062998353e3a19449055829d",
"status": "affected",
"version": "99f1fe189daf8e99a847e420567e49dd7ee2aae7",
"versionType": "git"
},
{
"lessThan": "953a4a352a0c185460ae1449e4c6e6658e55fdfc",
"status": "affected",
"version": "99f1fe189daf8e99a847e420567e49dd7ee2aae7",
"versionType": "git"
},
{
"lessThan": "84ea44dc3e4ecb2632586238014bf6722aa5843b",
"status": "affected",
"version": "99f1fe189daf8e99a847e420567e49dd7ee2aae7",
"versionType": "git"
},
{
"lessThan": "f9d9d25ad1f0d060eaf297a2f7f03b5855a45561",
"status": "affected",
"version": "99f1fe189daf8e99a847e420567e49dd7ee2aae7",
"versionType": "git"
},
{
"lessThan": "765566110eb0da3cf60198b0165ecceeaafa6444",
"status": "affected",
"version": "99f1fe189daf8e99a847e420567e49dd7ee2aae7",
"versionType": "git"
},
{
"lessThan": "fcfeaa570f7a5c2d5f4f14931909531ff18b7fde",
"status": "affected",
"version": "99f1fe189daf8e99a847e420567e49dd7ee2aae7",
"versionType": "git"
},
{
"lessThan": "db4df8e9d79e7d37732c1a1b560958e8dadfefa1",
"status": "affected",
"version": "99f1fe189daf8e99a847e420567e49dd7ee2aae7",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/tty/tty_io.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.28"
},
{
"lessThan": "2.6.28",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.308",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.276",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.235",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.173",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.100",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.*",
"status": "unaffected",
"version": "6.2.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: fix out-of-bounds access in tty_driver_lookup_tty()\n\nWhen specifying an invalid console= device like console=tty3270,\ntty_driver_lookup_tty() returns the tty struct without checking\nwhether index is a valid number.\n\nTo reproduce:\n\nqemu-system-x86_64 -enable-kvm -nographic -serial mon:stdio \\\n-kernel ../linux-build-x86/arch/x86/boot/bzImage \\\n-append \"console=ttyS0 console=tty3270\"\n\nThis crashes with:\n\n[ 0.770599] BUG: kernel NULL pointer dereference, address: 00000000000000ef\n[ 0.771265] #PF: supervisor read access in kernel mode\n[ 0.771773] #PF: error_code(0x0000) - not-present page\n[ 0.772609] Oops: 0000 [#1] PREEMPT SMP PTI\n[ 0.774878] RIP: 0010:tty_open+0x268/0x6f0\n[ 0.784013] chrdev_open+0xbd/0x230\n[ 0.784444] ? cdev_device_add+0x80/0x80\n[ 0.784920] do_dentry_open+0x1e0/0x410\n[ 0.785389] path_openat+0xca9/0x1050\n[ 0.785813] do_filp_open+0xaa/0x150\n[ 0.786240] file_open_name+0x133/0x1b0\n[ 0.786746] filp_open+0x27/0x50\n[ 0.787244] console_on_rootfs+0x14/0x4d\n[ 0.787800] kernel_init_freeable+0x1e4/0x20d\n[ 0.788383] ? rest_init+0xc0/0xc0\n[ 0.788881] kernel_init+0x11/0x120\n[ 0.789356] ret_from_fork+0x22/0x30"
}
],
"id": "CVE-2023-54198",
"lastModified": "2026-08-04T11:16:36.100",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2025-12-30T13:16:07.877",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3df6f492f500a16c231f07ccc6f6ed1302caddf9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/765566110eb0da3cf60198b0165ecceeaafa6444"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/84ea44dc3e4ecb2632586238014bf6722aa5843b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/953a4a352a0c185460ae1449e4c6e6658e55fdfc"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b79109d6470aaae7062998353e3a19449055829d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/db4df8e9d79e7d37732c1a1b560958e8dadfefa1"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f9d9d25ad1f0d060eaf297a2f7f03b5855a45561"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/fcfeaa570f7a5c2d5f4f14931909531ff18b7fde"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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- 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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
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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Related by attack behaviour
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