290 lines
17 KiB
JSON
290 lines
17 KiB
JSON
{
|
||
"dataType": "CVE_RECORD",
|
||
"dataVersion": "5.2",
|
||
"cveMetadata": {
|
||
"cveId": "CVE-2025-38262",
|
||
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
||
"state": "PUBLISHED",
|
||
"assignerShortName": "Linux",
|
||
"dateReserved": "2025-04-16T04:51:23.997Z",
|
||
"datePublished": "2025-07-09T10:42:37.410Z",
|
||
"dateUpdated": "2026-10-15T21:52:13.087Z"
|
||
},
|
||
"containers": {
|
||
"cna": {
|
||
"providerMetadata": {
|
||
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
||
"shortName": "Linux",
|
||
"dateUpdated": "2026-08-05T12:00:50.359Z"
|
||
},
|
||
"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 'uart_state' 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."
|
||
}
|
||
],
|
||
"metrics": [
|
||
{
|
||
"cvssV3_1": {
|
||
"version": "3.1",
|
||
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
|
||
"baseScore": 7.8,
|
||
"baseSeverity": "HIGH"
|
||
},
|
||
"scenarios": [
|
||
{
|
||
"lang": "en",
|
||
"value": "AV:L - The vulnerable window lives entirely in the uartlite platform-driver probe path, reachable only from local device/module instantiation (module load, deferred-probe worker, DT-overlay/FPGA-region or sysfs bind) on the affected host. No remote, adjacent, or physical-interface data reaches this code — the race is in driver registration, not in serial data handling.\nAC:L - Success requires the system to be in a specific state the attacker cannot create or influence — two uartlite instances probing simultaneously with one thread inside the few-microsecond window between `drv->state = kzalloc()` and `tty_port_init()`/`tty_register_driver()`. There is no way to widen, stall, or re-trigger that window from a local attacker's position, so it is a condition truly beyond attacker control.\nPR:L - Scored as a local unprivileged attacker present on an affected FPGA/embedded system when the concurrent probe occurs; the code itself performs no capability check. Deliberately forcing a probe (modprobe, sysfs bind, DT overlay) would need root, but the higher-severity assumption of a merely unprivileged local presence is used here.\nUI:N - The race fires during driver/device initialization driven by the kernel's own probe machinery; no victim action such as opening a device, mounting a filesystem, or loading a file is required.\nS:U - The corruption is confined to kernel data structures (`uart_driver.state`, `tty_port`, slab objects) within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is not a bare NULL dereference — `uart_add_one_port()` reads through a half-built or already-`kfree()`d `drv->state`/`drv->tty_driver` (`drv->tty_driver->minor_start`, `state->uart_port`), giving reads of freed slab memory whose contents can be reallocated to other objects, so it is leverageable for kernel memory disclosure.\nI:H - In the double-registration interleaving the losing thread's error path `kfree()`s the shared `drv->state` array while the winner writes through it (`atomic_set(&state->refcount,1)`, `init_waitqueue_head()`, `state->uart_port = uport`, `tty_port_link_device()`), a use-after-free write that plants kernel pointers and performs list/mutex operations inside a freed, potentially reallocated slab object — memory corruption usable for control-flow hijacking.\nA:H - The documented and reproduced outcome is an immediate kernel panic (`BUG: kernel NULL pointer dereference` in `mutex_lock` from `uart_add_one_port`), and `BUG_ON(drv->state)` in the concurrent `uart_register_driver()` is a second crash path. On 5.4–6.12 the oops happens while the global `port_mutex` is held, permanently deadlocking all further serial-port and console registration even if the box survives the oops."
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"affected": [
|
||
{
|
||
"product": "Linux",
|
||
"vendor": "Linux",
|
||
"defaultStatus": "unaffected",
|
||
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
||
"programFiles": [
|
||
"drivers/tty/serial/uartlite.c"
|
||
],
|
||
"versions": [
|
||
{
|
||
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
|
||
"lessThan": "5015eed450005bab6e5cb6810f7a62eab0434fc4",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
|
||
"lessThan": "9c905fdbba68a6d73d39a6b7de9b9f0d6c46df87",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
|
||
"lessThan": "6db06aaea07bb7c8e33a425cf7b98bf29ee6056e",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
|
||
"lessThan": "8e958d10dd0ce5ae674cce460db5c9ca3f25243b",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
|
||
"lessThan": "685d29f2c5057b32c7b1b46f2a7d303b926c8f72",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
|
||
"lessThan": "f5e4229d94792b40e750f30c92bcf7a3107c72ef",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
},
|
||
{
|
||
"version": "238b8721a554a33a451a3f13bdb5be8fe5cfc927",
|
||
"lessThan": "6bd697b5fc39fd24e2aa418c7b7d14469f550a93",
|
||
"status": "affected",
|
||
"versionType": "git"
|
||
}
|
||
]
|
||
},
|
||
{
|
||
"product": "Linux",
|
||
"vendor": "Linux",
|
||
"defaultStatus": "affected",
|
||
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
||
"programFiles": [
|
||
"drivers/tty/serial/uartlite.c"
|
||
],
|
||
"versions": [
|
||
{
|
||
"version": "2.6.20",
|
||
"status": "affected"
|
||
},
|
||
{
|
||
"version": "0",
|
||
"lessThan": "2.6.20",
|
||
"status": "unaffected",
|
||
"versionType": "semver"
|
||
},
|
||
{
|
||
"version": "5.4.296",
|
||
"lessThanOrEqual": "5.4.*",
|
||
"status": "unaffected",
|
||
"versionType": "semver"
|
||
},
|
||
{
|
||
"version": "5.15.187",
|
||
"lessThanOrEqual": "5.15.*",
|
||
"status": "unaffected",
|
||
"versionType": "semver"
|
||
},
|
||
{
|
||
"version": "6.1.143",
|
||
"lessThanOrEqual": "6.1.*",
|
||
"status": "unaffected",
|
||
"versionType": "semver"
|
||
},
|
||
{
|
||
"version": "6.6.96",
|
||
"lessThanOrEqual": "6.6.*",
|
||
"status": "unaffected",
|
||
"versionType": "semver"
|
||
},
|
||
{
|
||
"version": "6.12.36",
|
||
"lessThanOrEqual": "6.12.*",
|
||
"status": "unaffected",
|
||
"versionType": "semver"
|
||
},
|
||
{
|
||
"version": "6.15.5",
|
||
"lessThanOrEqual": "6.15.*",
|
||
"status": "unaffected",
|
||
"versionType": "semver"
|
||
},
|
||
{
|
||
"version": "6.16",
|
||
"lessThanOrEqual": "*",
|
||
"status": "unaffected",
|
||
"versionType": "original_commit_for_fix"
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"cpeApplicability": [
|
||
{
|
||
"nodes": [
|
||
{
|
||
"operator": "OR",
|
||
"negate": false,
|
||
"cpeMatch": [
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "2.6.20",
|
||
"versionEndExcluding": "5.4.296"
|
||
},
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "2.6.20",
|
||
"versionEndExcluding": "5.15.187"
|
||
},
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "2.6.20",
|
||
"versionEndExcluding": "6.1.143"
|
||
},
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "2.6.20",
|
||
"versionEndExcluding": "6.6.96"
|
||
},
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "2.6.20",
|
||
"versionEndExcluding": "6.12.36"
|
||
},
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "2.6.20",
|
||
"versionEndExcluding": "6.15.5"
|
||
},
|
||
{
|
||
"vulnerable": true,
|
||
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
||
"versionStartIncluding": "2.6.20",
|
||
"versionEndExcluding": "6.16"
|
||
}
|
||
]
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"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"
|
||
}
|
||
},
|
||
"adp": [
|
||
{
|
||
"title": "CVE Program Container",
|
||
"references": [
|
||
{
|
||
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
|
||
}
|
||
],
|
||
"providerMetadata": {
|
||
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
|
||
"shortName": "CVE",
|
||
"dateUpdated": "2025-11-03T17:36:04.315Z"
|
||
}
|
||
},
|
||
{
|
||
"metrics": [
|
||
{
|
||
"other": {
|
||
"type": "ssvc",
|
||
"content": {
|
||
"id": "CVE-2025-38262",
|
||
"role": "CISA Coordinator",
|
||
"options": [
|
||
{
|
||
"Exploitation": "none"
|
||
},
|
||
{
|
||
"Automatable": "no"
|
||
},
|
||
{
|
||
"Technical Impact": "total"
|
||
}
|
||
],
|
||
"version": "2.0.3",
|
||
"timestamp": "2026-10-15T21:49:09.978264Z"
|
||
}
|
||
}
|
||
}
|
||
],
|
||
"title": "CISA ADP Vulnrichment",
|
||
"providerMetadata": {
|
||
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
||
"shortName": "CISA-ADP",
|
||
"dateUpdated": "2026-10-15T21:52:13.087Z"
|
||
}
|
||
}
|
||
]
|
||
}
|
||
} |