CVE-2025-38262 (GCVE-0-2025-38262)
Vulnerability from cvelistv5
Published
2025-07-09 10:42
Modified
2025-07-28 04:16
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
tty: serial: uartlite: register uart driver in init
When two instances of uart devices are probing, a concurrency race can
occur. If one thread calls uart_register_driver function, which first
allocates and assigns memory to 'uart_state' member of uart_driver
structure, the other instance can bypass uart driver registration and
call ulite_assign. This calls uart_add_one_port, which expects the uart
driver to be fully initialized. This leads to a kernel panic due to a
null pointer dereference:
[ 8.143581] BUG: kernel NULL pointer dereference, address: 00000000000002b8
[ 8.156982] #PF: supervisor write access in kernel mode
[ 8.156984] #PF: error_code(0x0002) - not-present page
[ 8.156986] PGD 0 P4D 0
...
[ 8.180668] RIP: 0010:mutex_lock+0x19/0x30
[ 8.188624] Call Trace:
[ 8.188629] ? __die_body.cold+0x1a/0x1f
[ 8.195260] ? page_fault_oops+0x15c/0x290
[ 8.209183] ? __irq_resolve_mapping+0x47/0x80
[ 8.209187] ? exc_page_fault+0x64/0x140
[ 8.209190] ? asm_exc_page_fault+0x22/0x30
[ 8.209196] ? mutex_lock+0x19/0x30
[ 8.223116] uart_add_one_port+0x60/0x440
[ 8.223122] ? proc_tty_register_driver+0x43/0x50
[ 8.223126] ? tty_register_driver+0x1ca/0x1e0
[ 8.246250] ulite_probe+0x357/0x4b0 [uartlite]
To prevent it, move uart driver registration in to init function. This
will ensure that uart_driver is always registered when probe function
is called.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ► | Linux | Linux |
Version: 238b8721a554a33a451a3f13bdb5be8fe5cfc927 Version: 238b8721a554a33a451a3f13bdb5be8fe5cfc927 Version: 238b8721a554a33a451a3f13bdb5be8fe5cfc927 Version: 238b8721a554a33a451a3f13bdb5be8fe5cfc927 Version: 238b8721a554a33a451a3f13bdb5be8fe5cfc927 Version: 238b8721a554a33a451a3f13bdb5be8fe5cfc927 Version: 238b8721a554a33a451a3f13bdb5be8fe5cfc927 |
|
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/tty/serial/uartlite.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "5015eed450005bab6e5cb6810f7a62eab0434fc4",
"status": "affected",
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"versionType": "git"
},
{
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},
{
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"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
"versionType": "git"
},
{
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"status": "affected",
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
"versionType": "git"
},
{
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"status": "affected",
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/tty/serial/uartlite.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.20"
},
{
"lessThan": "2.6.20",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.296",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.187",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.143",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.36",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.15.*",
"status": "unaffected",
"version": "6.15.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.296",
"versionStartIncluding": "2.6.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.187",
"versionStartIncluding": "2.6.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.143",
"versionStartIncluding": "2.6.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.96",
"versionStartIncluding": "2.6.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.36",
"versionStartIncluding": "2.6.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.15.5",
"versionStartIncluding": "2.6.20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.16",
"versionStartIncluding": "2.6.20",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: uartlite: register uart driver in init\n\nWhen two instances of uart devices are probing, a concurrency race can\noccur. If one thread calls uart_register_driver function, which first\nallocates and assigns memory to \u0027uart_state\u0027 member of uart_driver\nstructure, the other instance can bypass uart driver registration and\ncall ulite_assign. This calls uart_add_one_port, which expects the uart\ndriver to be fully initialized. This leads to a kernel panic due to a\nnull pointer dereference:\n\n[ 8.143581] BUG: kernel NULL pointer dereference, address: 00000000000002b8\n[ 8.156982] #PF: supervisor write access in kernel mode\n[ 8.156984] #PF: error_code(0x0002) - not-present page\n[ 8.156986] PGD 0 P4D 0\n...\n[ 8.180668] RIP: 0010:mutex_lock+0x19/0x30\n[ 8.188624] Call Trace:\n[ 8.188629] ? __die_body.cold+0x1a/0x1f\n[ 8.195260] ? page_fault_oops+0x15c/0x290\n[ 8.209183] ? __irq_resolve_mapping+0x47/0x80\n[ 8.209187] ? exc_page_fault+0x64/0x140\n[ 8.209190] ? asm_exc_page_fault+0x22/0x30\n[ 8.209196] ? mutex_lock+0x19/0x30\n[ 8.223116] uart_add_one_port+0x60/0x440\n[ 8.223122] ? proc_tty_register_driver+0x43/0x50\n[ 8.223126] ? tty_register_driver+0x1ca/0x1e0\n[ 8.246250] ulite_probe+0x357/0x4b0 [uartlite]\n\nTo prevent it, move uart driver registration in to init function. This\nwill ensure that uart_driver is always registered when probe function\nis called."
}
],
"providerMetadata": {
"dateUpdated": "2025-07-28T04:16:34.836Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/5015eed450005bab6e5cb6810f7a62eab0434fc4"
},
{
"url": "https://git.kernel.org/stable/c/9c905fdbba68a6d73d39a6b7de9b9f0d6c46df87"
},
{
"url": "https://git.kernel.org/stable/c/6db06aaea07bb7c8e33a425cf7b98bf29ee6056e"
},
{
"url": "https://git.kernel.org/stable/c/8e958d10dd0ce5ae674cce460db5c9ca3f25243b"
},
{
"url": "https://git.kernel.org/stable/c/685d29f2c5057b32c7b1b46f2a7d303b926c8f72"
},
{
"url": "https://git.kernel.org/stable/c/f5e4229d94792b40e750f30c92bcf7a3107c72ef"
},
{
"url": "https://git.kernel.org/stable/c/6bd697b5fc39fd24e2aa418c7b7d14469f550a93"
}
],
"title": "tty: serial: uartlite: register uart driver in init",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-38262",
"datePublished": "2025-07-09T10:42:37.410Z",
"dateReserved": "2025-04-16T04:51:23.997Z",
"dateUpdated": "2025-07-28T04:16:34.836Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-38262\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-09T11:15:28.570\",\"lastModified\":\"2025-07-17T17:15:39.130\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntty: serial: uartlite: register uart driver in init\\n\\nWhen two instances of uart devices are probing, a concurrency race can\\noccur. If one thread calls uart_register_driver function, which first\\nallocates and assigns memory to \u0027uart_state\u0027 member of uart_driver\\nstructure, the other instance can bypass uart driver registration and\\ncall ulite_assign. This calls uart_add_one_port, which expects the uart\\ndriver to be fully initialized. This leads to a kernel panic due to a\\nnull pointer dereference:\\n\\n[ 8.143581] BUG: kernel NULL pointer dereference, address: 00000000000002b8\\n[ 8.156982] #PF: supervisor write access in kernel mode\\n[ 8.156984] #PF: error_code(0x0002) - not-present page\\n[ 8.156986] PGD 0 P4D 0\\n...\\n[ 8.180668] RIP: 0010:mutex_lock+0x19/0x30\\n[ 8.188624] Call Trace:\\n[ 8.188629] ? __die_body.cold+0x1a/0x1f\\n[ 8.195260] ? page_fault_oops+0x15c/0x290\\n[ 8.209183] ? __irq_resolve_mapping+0x47/0x80\\n[ 8.209187] ? exc_page_fault+0x64/0x140\\n[ 8.209190] ? asm_exc_page_fault+0x22/0x30\\n[ 8.209196] ? mutex_lock+0x19/0x30\\n[ 8.223116] uart_add_one_port+0x60/0x440\\n[ 8.223122] ? proc_tty_register_driver+0x43/0x50\\n[ 8.223126] ? tty_register_driver+0x1ca/0x1e0\\n[ 8.246250] ulite_probe+0x357/0x4b0 [uartlite]\\n\\nTo prevent it, move uart driver registration in to init function. This\\nwill ensure that uart_driver is always registered when probe function\\nis called.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tty: serial: uartlite: registrar el controlador UART en init. Cuando dos instancias de dispositivos UART est\u00e1n realizando pruebas, puede producirse una ejecuci\u00f3n de concurrencia. Si un subproceso invoca la funci\u00f3n uart_register_driver, que primero asigna memoria al miembro \u0027uart_state\u0027 de la estructura uart_driver, la otra instancia puede omitir el registro del controlador UART y llamar a ulite_assign. Esto invoca uart_add_one_port, que espera que el controlador UART est\u00e9 completamente inicializado. Esto genera un p\u00e1nico del kernel debido a una desreferencia de puntero nulo: [8.143581] ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 00000000000002b8 [8.156982] #PF: acceso de escritura del supervisor en modo kernel [8.156984] #PF: error_code(0x0002) - p\u00e1gina no presente [8.156986] PGD 0 P4D 0 ... [8.180668] RIP: 0010:mutex_lock+0x19/0x30 [8.188624] Rastreo de llamadas: [ 8.188629] ? __die_body.cold+0x1a/0x1f [ 8.195260] ? page_fault_oops+0x15c/0x290 [ 8.209183] ? __irq_resolve_mapping+0x47/0x80 [ 8.209187] ? exc_page_fault+0x64/0x140 [ 8.209190] ? asm_exc_page_fault+0x22/0x30 [ 8.209196] ? mutex_lock+0x19/0x30 [ 8.223116] uart_add_one_port+0x60/0x440 [ 8.223122] ? proc_tty_register_driver+0x43/0x50 [ 8.223126] ? tty_register_driver+0x1ca/0x1e0 [ 8.246250] ulite_probe+0x357/0x4b0 [uartlite] Para evitarlo, mueva el registro del controlador UART a la funci\u00f3n init. Esto garantizar\u00e1 que uart_driver siempre se registre al llamar a la funci\u00f3n de sondeo.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5015eed450005bab6e5cb6810f7a62eab0434fc4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/685d29f2c5057b32c7b1b46f2a7d303b926c8f72\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6bd697b5fc39fd24e2aa418c7b7d14469f550a93\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6db06aaea07bb7c8e33a425cf7b98bf29ee6056e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8e958d10dd0ce5ae674cce460db5c9ca3f25243b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9c905fdbba68a6d73d39a6b7de9b9f0d6c46df87\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f5e4229d94792b40e750f30c92bcf7a3107c72ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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