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vuln-cve/data/2025/38xxx/CVE-2025-38005.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-38005",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-04-16T04:51:23.977Z",
"datePublished": "2025-06-18T09:28:17.105Z",
"dateUpdated": "2026-08-05T11:58:56.689Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T11:58:56.689Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: ti: k3-udma: Add missing locking\n\nRecent kernels complain about a missing lock in k3-udma.c when the lock\nvalidator is enabled:\n\n[ 4.128073] WARNING: CPU: 0 PID: 746 at drivers/dma/ti/../virt-dma.h:169 udma_start.isra.0+0x34/0x238\n[ 4.137352] CPU: 0 UID: 0 PID: 746 Comm: kworker/0:3 Not tainted 6.12.9-arm64 #28\n[ 4.144867] Hardware name: pp-v12 (DT)\n[ 4.148648] Workqueue: events udma_check_tx_completion\n[ 4.153841] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 4.160834] pc : udma_start.isra.0+0x34/0x238\n[ 4.165227] lr : udma_start.isra.0+0x30/0x238\n[ 4.169618] sp : ffffffc083cabcf0\n[ 4.172963] x29: ffffffc083cabcf0 x28: 0000000000000000 x27: ffffff800001b005\n[ 4.180167] x26: ffffffc0812f0000 x25: 0000000000000000 x24: 0000000000000000\n[ 4.187370] x23: 0000000000000001 x22: 00000000e21eabe9 x21: ffffff8000fa0670\n[ 4.194571] x20: ffffff8001b6bf00 x19: ffffff8000fa0430 x18: ffffffc083b95030\n[ 4.201773] x17: 0000000000000000 x16: 00000000f0000000 x15: 0000000000000048\n[ 4.208976] x14: 0000000000000048 x13: 0000000000000000 x12: 0000000000000001\n[ 4.216179] x11: ffffffc08151a240 x10: 0000000000003ea1 x9 : ffffffc08046ab68\n[ 4.223381] x8 : ffffffc083cabac0 x7 : ffffffc081df3718 x6 : 0000000000029fc8\n[ 4.230583] x5 : ffffffc0817ee6d8 x4 : 0000000000000bc0 x3 : 0000000000000000\n[ 4.237784] x2 : 0000000000000000 x1 : 00000000001fffff x0 : 0000000000000000\n[ 4.244986] Call trace:\n[ 4.247463] udma_start.isra.0+0x34/0x238\n[ 4.251509] udma_check_tx_completion+0xd0/0xdc\n[ 4.256076] process_one_work+0x244/0x3fc\n[ 4.260129] process_scheduled_works+0x6c/0x74\n[ 4.264610] worker_thread+0x150/0x1dc\n[ 4.268398] kthread+0xd8/0xe8\n[ 4.271492] ret_from_fork+0x10/0x20\n[ 4.275107] irq event stamp: 220\n[ 4.278363] hardirqs last enabled at (219): [<ffffffc080a27c7c>] _raw_spin_unlock_irq+0x38/0x50\n[ 4.287183] hardirqs last disabled at (220): [<ffffffc080a1c154>] el1_dbg+0x24/0x50\n[ 4.294879] softirqs last enabled at (182): [<ffffffc080037e68>] handle_softirqs+0x1c0/0x3cc\n[ 4.303437] softirqs last disabled at (177): [<ffffffc080010170>] __do_softirq+0x1c/0x28\n[ 4.311559] ---[ end trace 0000000000000000 ]---\n\nThis commit adds the missing locking."
}
],
"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 k3-udma DMA engine is driven by local device consumers — a tty (`write()` + `TCFLSH`), ALSA PCM, or SPI node on a TI K3 SoC — with no network-facing path to the vulnerable worker. Exploitation requires local system access via syscalls/ioctls on those device files.\nAC:L - The attacker controls both sides of the race: the drain-loop side is widened arbitrarily (seconds) by selecting a slow baud rate so the peer PDMA lags, and the terminate side is fired on demand via `tcflush()`, which reaches `dmaengine_terminate_async()` → `udma_terminate_all()`'s non-synchronous `cancel_delayed_work()`. The sequence is freely repeatable until it lands.\nPR:L - Only an unprivileged account with access to a device node backed by a UDMA channel is needed — a tty (dialout/owning session), `/dev/snd/pcm*` (audio group), or spidev — all routinely granted to non-root users on the embedded, industrial, and automotive K3 deployments this driver targets. No capability check gates the path.\nUI:N - The attacker's own `write()`/`ioctl(TCFLSH)` sequence on a device it already has open drives the entire race. No victim action or cooperation is involved.\nS:U - The corruption is confined to kernel heap objects and virt-dma lists within the same kernel security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unlocked worker dereferences a `struct udma_desc` that `vchan_dma_desc_free_list()`/`udma_purge_desc_work()` may have already `kfree()`d, and traverses spliced list heads — a use-after-free that lets a groomed replacement object be read back, yielding arbitrary kernel memory disclosure.\nI:H - `list_del()` in `udma_start()` and `list_add_tail()` in `vchan_cookie_complete()` execute unlocked against concurrently spliced and freed nodes, giving classic doubly-linked-list corruption plus writes through a stale descriptor in `udma_decrement_byte_counters()` — a controllable write primitive suitable for control-flow hijack.\nA:H - Even unweaponized, the use-after-free and list corruption reliably produce oopses, double-frees, and slab corruption panics; the concurrent double `udma_start()` from worker and IRQ handler also wedges the DMA channel."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/dma/ti/k3-udma.c"
],
"versions": [
{
"version": "25dcb5dd7b7ce5587c1df18f584ff78f51a68a94",
"lessThan": "27e71fa08711e09d81e06a54007b362a5426fd22",
"status": "affected",
"versionType": "git"
},
{
"version": "25dcb5dd7b7ce5587c1df18f584ff78f51a68a94",
"lessThan": "0ea0433f822ed0549715f7044c9cd1cf132ff7fa",
"status": "affected",
"versionType": "git"
},
{
"version": "25dcb5dd7b7ce5587c1df18f584ff78f51a68a94",
"lessThan": "df5987e76a4ae4cbd705d81ab4b15ed232250a4a",
"status": "affected",
"versionType": "git"
},
{
"version": "25dcb5dd7b7ce5587c1df18f584ff78f51a68a94",
"lessThan": "d87f1cddc592387359fde157cc4296556f6403c2",
"status": "affected",
"versionType": "git"
},
{
"version": "25dcb5dd7b7ce5587c1df18f584ff78f51a68a94",
"lessThan": "26e63b2fe30c61bd25981c6084f67a8af79945d0",
"status": "affected",
"versionType": "git"
},
{
"version": "25dcb5dd7b7ce5587c1df18f584ff78f51a68a94",
"lessThan": "99df1edf17493cb49a8c01f6bde55c3abb6a2a6c",
"status": "affected",
"versionType": "git"
},
{
"version": "25dcb5dd7b7ce5587c1df18f584ff78f51a68a94",
"lessThan": "fca280992af8c2fbd511bc43f65abb4a17363f2f",
"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/dma/ti/k3-udma.c"
],
"versions": [
{
"version": "5.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.6",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.238",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.184",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.140",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.92",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.30",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.14.8",
"lessThanOrEqual": "6.14.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.15",
"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": "5.6",
"versionEndExcluding": "5.10.238"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "5.15.184"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.1.140"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.6.92"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.12.30"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.14.8"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.6",
"versionEndExcluding": "6.15"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/27e71fa08711e09d81e06a54007b362a5426fd22"
},
{
"url": "https://git.kernel.org/stable/c/0ea0433f822ed0549715f7044c9cd1cf132ff7fa"
},
{
"url": "https://git.kernel.org/stable/c/df5987e76a4ae4cbd705d81ab4b15ed232250a4a"
},
{
"url": "https://git.kernel.org/stable/c/d87f1cddc592387359fde157cc4296556f6403c2"
},
{
"url": "https://git.kernel.org/stable/c/26e63b2fe30c61bd25981c6084f67a8af79945d0"
},
{
"url": "https://git.kernel.org/stable/c/99df1edf17493cb49a8c01f6bde55c3abb6a2a6c"
},
{
"url": "https://git.kernel.org/stable/c/fca280992af8c2fbd511bc43f65abb4a17363f2f"
}
],
"title": "dmaengine: ti: k3-udma: Add missing locking",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"title": "CVE Program Container",
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2025-11-03T19:58:13.689Z"
}
}
]
}
}
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