CVE-2026-80860

Status: ReceivedUnscored—

In the Linux kernel, the following vulnerability has been resolved:

fuse: fix race between interrupt and resend

After commit f8fce75fedf7 ("fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req") the WARN_ON(!list_empty(&req->intr_entry)) in fuse_request_free() still triggers due to the following race:

Fix by:

- move clearing FR_SENT inside fpq->lock

- move setting FR_PENDING inside fiq->lock

- recheck FR_SENT after acquiring fiq->lock in fuse_dev_queue_interrupt()

Technical details traces, logs and code from the original report

In request_wait_answer()
  if (test_bit(FR_SENT, &req->flags)) -> returns true

In fuse_chan_resend()
  clear_bit(FR_SENT, &req->flags)

In request_wait_answer()
  queue_interrupt(req)

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.16%
Percentile among all scored CVEs: 4
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux Kernel^AI

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-80860",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "1d8ecd0cd696a5df0b2f72046a4ccee5d2a8ec2c",
              "lessThan": "67ddf061790e833d7e34f9dc901866c9fb25d72d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7366e6f4d2b4c7002b13fb01219e83679dad4127",
              "lessThan": "0f930904452945f409eeeb0c9afa08bf27185cb1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f8fce75fedf73ac72aa09163deb8f4291fdcaad2",
              "lessThan": "26fbe4bc3ef3ab0200407681cbef182af5d151de",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f8fce75fedf73ac72aa09163deb8f4291fdcaad2",
              "lessThan": "ed9c881f3b498383f73c42712b359419da42a7b0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "893479015cb6442fd389d3b553ab3036c9541715",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.12.96",
              "lessThan": "6.12.111",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.18.39",
              "lessThan": "6.18.51",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "7.1.4",
              "lessThan": "7.2",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/fuse/dev.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.2"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "7.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.3",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/fuse/dev.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-04T16:18:15.173",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0f930904452945f409eeeb0c9afa08bf27185cb1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/26fbe4bc3ef3ab0200407681cbef182af5d151de",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/67ddf061790e833d7e34f9dc901866c9fb25d72d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ed9c881f3b498383f73c42712b359419da42a7b0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix race between interrupt and resend\n\nAfter commit f8fce75fedf7 (\"fuse: clear intr_entry in fuse_resend and\nfuse_remove_pending_req\") the WARN_ON(!list_empty(&req->intr_entry)) in\nfuse_request_free() still triggers due to the following race:\n\nIn request_wait_answer()\n  if (test_bit(FR_SENT, &req->flags)) -> returns true\n\nIn fuse_chan_resend()\n  clear_bit(FR_SENT, &req->flags)\n\nIn request_wait_answer()\n  queue_interrupt(req)\n\nFix by:\n\n - move clearing FR_SENT inside fpq->lock\n\n - move setting FR_PENDING inside fiq->lock\n\n - recheck FR_SENT after acquiring fiq->lock in fuse_dev_queue_interrupt()"
    }
  ],
  "lastModified": "2026-09-21T14:17:21.050",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}