CVE-2025-40061 (GCVE-0-2025-40061)
Vulnerability from cvelistv5
Published
2025-10-28 11:48
Modified
2025-10-28 11:48
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix race in do_task() when draining When do_task() exhausts its iteration budget (!ret), it sets the state to TASK_STATE_IDLE to reschedule, without a secondary check on the current task->state. This can overwrite the TASK_STATE_DRAINING state set by a concurrent call to rxe_cleanup_task() or rxe_disable_task(). While state changes are protected by a spinlock, both rxe_cleanup_task() and rxe_disable_task() release the lock while waiting for the task to finish draining in the while(!is_done(task)) loop. The race occurs if do_task() hits its iteration limit and acquires the lock in this window. The cleanup logic may then proceed while the task incorrectly reschedules itself, leading to a potential use-after-free. This bug was introduced during the migration from tasklets to workqueues, where the special handling for the draining case was lost. Fix this by restoring the original pre-migration behavior. If the state is TASK_STATE_DRAINING when iterations are exhausted, set cont to 1 to force a new loop iteration. This allows the task to finish its work, so that a subsequent iteration can reach the switch statement and correctly transition the state to TASK_STATE_DRAINED, stopping the task as intended.
References
Impacted products
Vendor Product Version
Linux Linux Version: 9b4b7c1f9f54120940e243251e2b1407767b3381
Version: 9b4b7c1f9f54120940e243251e2b1407767b3381
Version: 9b4b7c1f9f54120940e243251e2b1407767b3381
Version: 9b4b7c1f9f54120940e243251e2b1407767b3381
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_task.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "85288bcf7ffe11e7b036edf91937bc62fd384076",
              "status": "affected",
              "version": "9b4b7c1f9f54120940e243251e2b1407767b3381",
              "versionType": "git"
            },
            {
              "lessThan": "52edccfb555142678c836c285bf5b4ec760bd043",
              "status": "affected",
              "version": "9b4b7c1f9f54120940e243251e2b1407767b3381",
              "versionType": "git"
            },
            {
              "lessThan": "660b6959c4170637f5db2279d1f71af33a49e49b",
              "status": "affected",
              "version": "9b4b7c1f9f54120940e243251e2b1407767b3381",
              "versionType": "git"
            },
            {
              "lessThan": "8ca7eada62fcfabf6ec1dc7468941e791c1d8729",
              "status": "affected",
              "version": "9b4b7c1f9f54120940e243251e2b1407767b3381",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/sw/rxe/rxe_task.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.112",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.53",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.3",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18-rc1",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix race in do_task() when draining\n\nWhen do_task() exhausts its iteration budget (!ret), it sets the state\nto TASK_STATE_IDLE to reschedule, without a secondary check on the\ncurrent task-\u003estate. This can overwrite the TASK_STATE_DRAINING state\nset by a concurrent call to rxe_cleanup_task() or rxe_disable_task().\n\nWhile state changes are protected by a spinlock, both rxe_cleanup_task()\nand rxe_disable_task() release the lock while waiting for the task to\nfinish draining in the while(!is_done(task)) loop. The race occurs if\ndo_task() hits its iteration limit and acquires the lock in this window.\nThe cleanup logic may then proceed while the task incorrectly\nreschedules itself, leading to a potential use-after-free.\n\nThis bug was introduced during the migration from tasklets to workqueues,\nwhere the special handling for the draining case was lost.\n\nFix this by restoring the original pre-migration behavior. If the state is\nTASK_STATE_DRAINING when iterations are exhausted, set cont to 1 to\nforce a new loop iteration. This allows the task to finish its work, so\nthat a subsequent iteration can reach the switch statement and correctly\ntransition the state to TASK_STATE_DRAINED, stopping the task as intended."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-28T11:48:33.361Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/85288bcf7ffe11e7b036edf91937bc62fd384076"
        },
        {
          "url": "https://git.kernel.org/stable/c/52edccfb555142678c836c285bf5b4ec760bd043"
        },
        {
          "url": "https://git.kernel.org/stable/c/660b6959c4170637f5db2279d1f71af33a49e49b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8ca7eada62fcfabf6ec1dc7468941e791c1d8729"
        }
      ],
      "title": "RDMA/rxe: Fix race in do_task() when draining",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40061",
    "datePublished": "2025-10-28T11:48:33.361Z",
    "dateReserved": "2025-04-16T07:20:57.158Z",
    "dateUpdated": "2025-10-28T11:48:33.361Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40061\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-28T12:15:40.493\",\"lastModified\":\"2025-10-30T15:05:32.197\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRDMA/rxe: Fix race in do_task() when draining\\n\\nWhen do_task() exhausts its iteration budget (!ret), it sets the state\\nto TASK_STATE_IDLE to reschedule, without a secondary check on the\\ncurrent task-\u003estate. This can overwrite the TASK_STATE_DRAINING state\\nset by a concurrent call to rxe_cleanup_task() or rxe_disable_task().\\n\\nWhile state changes are protected by a spinlock, both rxe_cleanup_task()\\nand rxe_disable_task() release the lock while waiting for the task to\\nfinish draining in the while(!is_done(task)) loop. The race occurs if\\ndo_task() hits its iteration limit and acquires the lock in this window.\\nThe cleanup logic may then proceed while the task incorrectly\\nreschedules itself, leading to a potential use-after-free.\\n\\nThis bug was introduced during the migration from tasklets to workqueues,\\nwhere the special handling for the draining case was lost.\\n\\nFix this by restoring the original pre-migration behavior. If the state is\\nTASK_STATE_DRAINING when iterations are exhausted, set cont to 1 to\\nforce a new loop iteration. This allows the task to finish its work, so\\nthat a subsequent iteration can reach the switch statement and correctly\\ntransition the state to TASK_STATE_DRAINED, stopping the task as intended.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/52edccfb555142678c836c285bf5b4ec760bd043\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/660b6959c4170637f5db2279d1f71af33a49e49b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/85288bcf7ffe11e7b036edf91937bc62fd384076\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8ca7eada62fcfabf6ec1dc7468941e791c1d8729\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • 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.