FKIE_CVE-2026-98777

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: binder: fix leaked fd fixups on TF_UPDATE_TXN supersede When a TF_UPDATE_TXN transaction supersedes a pending async transaction in a frozen process, the outdated transaction is freed with kfree() directly. This skips binder_free_txn_fixups(), leaking all binder_txn_fd_fixup entries and their fget()'d struct file references. The leaked file refcounts never reach zero, so the struct file objects are permanently pinned in memory. They survive process exit and accumulate across invocations until file-max exhaustion. Every other transaction cleanup path (binder_free_transaction(), binder_transaction() error paths, binder_release_work()) correctly calls binder_free_txn_fixups(). Add the missing call before kfree() in the t_outdated cleanup block.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1299cb3fb061598496086fc87ff291057831148e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6673f4f21e2fddfed0abe1eb9045cc958e6db130
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7329ea53d04f0c6135d02905810cd6f42acdf45
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ab3f0ea529d4e36dde52c8efc76082c501abf9b6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c4c02084d6687d5cd5edccaf52cc45e5160f1184
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/android/binder.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ab3f0ea529d4e36dde52c8efc76082c501abf9b6",
              "status": "affected",
              "version": "9864bb4801331daa48514face9d0f4861e4d485b",
              "versionType": "git"
            },
            {
              "lessThan": "a7329ea53d04f0c6135d02905810cd6f42acdf45",
              "status": "affected",
              "version": "9864bb4801331daa48514face9d0f4861e4d485b",
              "versionType": "git"
            },
            {
              "lessThan": "7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55",
              "status": "affected",
              "version": "9864bb4801331daa48514face9d0f4861e4d485b",
              "versionType": "git"
            },
            {
              "lessThan": "1299cb3fb061598496086fc87ff291057831148e",
              "status": "affected",
              "version": "9864bb4801331daa48514face9d0f4861e4d485b",
              "versionType": "git"
            },
            {
              "lessThan": "6673f4f21e2fddfed0abe1eb9045cc958e6db130",
              "status": "affected",
              "version": "9864bb4801331daa48514face9d0f4861e4d485b",
              "versionType": "git"
            },
            {
              "lessThan": "c4c02084d6687d5cd5edccaf52cc45e5160f1184",
              "status": "affected",
              "version": "9864bb4801331daa48514face9d0f4861e4d485b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/android/binder.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix leaked fd fixups on TF_UPDATE_TXN supersede\n\nWhen a TF_UPDATE_TXN transaction supersedes a pending async transaction\nin a frozen process, the outdated transaction is freed with kfree()\ndirectly. This skips binder_free_txn_fixups(), leaking all\nbinder_txn_fd_fixup entries and their fget()\u0027d struct file references.\n\nThe leaked file refcounts never reach zero, so the struct file objects\nare permanently pinned in memory. They survive process exit and\naccumulate across invocations until file-max exhaustion.\n\nEvery other transaction cleanup path (binder_free_transaction(),\nbinder_transaction() error paths, binder_release_work()) correctly\ncalls binder_free_txn_fixups(). Add the missing call before kfree()\nin the t_outdated cleanup block."
    }
  ],
  "id": "CVE-2026-98777",
  "lastModified": "2026-10-30T13:21:27.273",
  "metrics": {},
  "published": "2026-10-18T16:17:31.657",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1299cb3fb061598496086fc87ff291057831148e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6673f4f21e2fddfed0abe1eb9045cc958e6db130"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7fd609fb0e9dcbc4d7a1e4da1af5368c0555ff55"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a7329ea53d04f0c6135d02905810cd6f42acdf45"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ab3f0ea529d4e36dde52c8efc76082c501abf9b6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c4c02084d6687d5cd5edccaf52cc45e5160f1184"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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