{ "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): [] _raw_spin_unlock_irq+0x38/0x50\n[ 4.287183] hardirqs last disabled at (220): [] el1_dbg+0x24/0x50\n[ 4.294879] softirqs last enabled at (182): [] handle_softirqs+0x1c0/0x3cc\n[ 4.303437] softirqs last disabled at (177): [] __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" } } ] } }