CVE-2025-38005 (GCVE-0-2025-38005)
Vulnerability from cvelistv5
Published
2025-06-18 09:28
Modified
2026-08-05 11:58
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: dmaengine: ti: k3-udma: Add missing locking Recent kernels complain about a missing lock in k3-udma.c when the lock validator is enabled: [ 4.128073] WARNING: CPU: 0 PID: 746 at drivers/dma/ti/../virt-dma.h:169 udma_start.isra.0+0x34/0x238 [ 4.137352] CPU: 0 UID: 0 PID: 746 Comm: kworker/0:3 Not tainted 6.12.9-arm64 #28 [ 4.144867] Hardware name: pp-v12 (DT) [ 4.148648] Workqueue: events udma_check_tx_completion [ 4.153841] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 4.160834] pc : udma_start.isra.0+0x34/0x238 [ 4.165227] lr : udma_start.isra.0+0x30/0x238 [ 4.169618] sp : ffffffc083cabcf0 [ 4.172963] x29: ffffffc083cabcf0 x28: 0000000000000000 x27: ffffff800001b005 [ 4.180167] x26: ffffffc0812f0000 x25: 0000000000000000 x24: 0000000000000000 [ 4.187370] x23: 0000000000000001 x22: 00000000e21eabe9 x21: ffffff8000fa0670 [ 4.194571] x20: ffffff8001b6bf00 x19: ffffff8000fa0430 x18: ffffffc083b95030 [ 4.201773] x17: 0000000000000000 x16: 00000000f0000000 x15: 0000000000000048 [ 4.208976] x14: 0000000000000048 x13: 0000000000000000 x12: 0000000000000001 [ 4.216179] x11: ffffffc08151a240 x10: 0000000000003ea1 x9 : ffffffc08046ab68 [ 4.223381] x8 : ffffffc083cabac0 x7 : ffffffc081df3718 x6 : 0000000000029fc8 [ 4.230583] x5 : ffffffc0817ee6d8 x4 : 0000000000000bc0 x3 : 0000000000000000 [ 4.237784] x2 : 0000000000000000 x1 : 00000000001fffff x0 : 0000000000000000 [ 4.244986] Call trace: [ 4.247463] udma_start.isra.0+0x34/0x238 [ 4.251509] udma_check_tx_completion+0xd0/0xdc [ 4.256076] process_one_work+0x244/0x3fc [ 4.260129] process_scheduled_works+0x6c/0x74 [ 4.264610] worker_thread+0x150/0x1dc [ 4.268398] kthread+0xd8/0xe8 [ 4.271492] ret_from_fork+0x10/0x20 [ 4.275107] irq event stamp: 220 [ 4.278363] hardirqs last enabled at (219): [<ffffffc080a27c7c>] _raw_spin_unlock_irq+0x38/0x50 [ 4.287183] hardirqs last disabled at (220): [<ffffffc080a1c154>] el1_dbg+0x24/0x50 [ 4.294879] softirqs last enabled at (182): [<ffffffc080037e68>] handle_softirqs+0x1c0/0x3cc [ 4.303437] softirqs last disabled at (177): [<ffffffc080010170>] __do_softirq+0x1c/0x28 [ 4.311559] ---[ end trace 0000000000000000 ]--- This commit adds the missing locking.
References
Impacted products
Vendor Product Version
Linux Linux Version: 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94
Version: 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94
Version: 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94
Version: 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94
Version: 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94
Version: 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94
Version: 25dcb5dd7b7ce5587c1df18f584ff78f51a68a94
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{
  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2025-11-03T19:58:13.689Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "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"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/ti/k3-udma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/dma/ti/k3-udma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.6"
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              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.238",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.140",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.6.92",
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            {
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              "status": "unaffected",
              "version": "6.12.30",
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            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
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      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.238",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.15.184",
                  "versionStartIncluding": "5.6",
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                {
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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): [\u003cffffffc080a27c7c\u003e] _raw_spin_unlock_irq+0x38/0x50\n[    4.287183] hardirqs last disabled at (220): [\u003cffffffc080a1c154\u003e] el1_dbg+0x24/0x50\n[    4.294879] softirqs last  enabled at (182): [\u003cffffffc080037e68\u003e] handle_softirqs+0x1c0/0x3cc\n[    4.303437] softirqs last disabled at (177): [\u003cffffffc080010170\u003e] __do_softirq+0x1c/0x28\n[    4.311559] ---[ end trace 0000000000000000 ]---\n\nThis commit adds the missing locking."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The k3-udma DMA engine is driven by local device consumers \u2014 a tty (`write()` + `TCFLSH`), ALSA PCM, or SPI node on a TI K3 SoC \u2014 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()` \u2192 `udma_terminate_all()`\u0027s 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 \u2014 a tty (dialout/owning session), `/dev/snd/pcm*` (audio group), or spidev \u2014 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\u0027s 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 \u2014 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()` \u2014 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:58:56.689Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38005",
    "datePublished": "2025-06-18T09:28:17.105Z",
    "dateReserved": "2025-04-16T04:51:23.977Z",
    "dateUpdated": "2026-08-05T11:58:56.689Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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