CVE-2026-23184 (GCVE-0-2026-23184)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-02-14 16:27
VLAI?
Title
binder: fix UAF in binder_netlink_report()
Summary
In the Linux kernel, the following vulnerability has been resolved: binder: fix UAF in binder_netlink_report() Oneway transactions sent to frozen targets via binder_proc_transaction() return a BR_TRANSACTION_PENDING_FROZEN error but they are still treated as successful since the target is expected to thaw at some point. It is then not safe to access 't' after BR_TRANSACTION_PENDING_FROZEN errors as the transaction could have been consumed by the now thawed target. This is the case for binder_netlink_report() which derreferences 't' after a pending frozen error, as pointed out by the following KASAN report: ================================================================== BUG: KASAN: slab-use-after-free in binder_netlink_report.isra.0+0x694/0x6c8 Read of size 8 at addr ffff00000f98ba38 by task binder-util/522 CPU: 4 UID: 0 PID: 522 Comm: binder-util Not tainted 6.19.0-rc6-00015-gc03e9c42ae8f #1 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: binder_netlink_report.isra.0+0x694/0x6c8 binder_transaction+0x66e4/0x79b8 binder_thread_write+0xab4/0x4440 binder_ioctl+0x1fd4/0x2940 [...] Allocated by task 522: __kmalloc_cache_noprof+0x17c/0x50c binder_transaction+0x584/0x79b8 binder_thread_write+0xab4/0x4440 binder_ioctl+0x1fd4/0x2940 [...] Freed by task 488: kfree+0x1d0/0x420 binder_free_transaction+0x150/0x234 binder_thread_read+0x2d08/0x3ce4 binder_ioctl+0x488/0x2940 [...] ================================================================== Instead, make a transaction copy so the data can be safely accessed by binder_netlink_report() after a pending frozen error. While here, add a comment about not using t->buffer in binder_netlink_report().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 63740349eba78f242bcbf60d5244d7f2b2600853 , < a6050dedb6f1cc23e518e3a132ab74a0aad6df90 (git)
Affected: 63740349eba78f242bcbf60d5244d7f2b2600853 , < 5e8a3d01544282e50d887d76f30d1496a0a53562 (git)
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    Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/android/binder.c"
          ],
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          "vendor": "Linux",
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix UAF in binder_netlink_report()\n\nOneway transactions sent to frozen targets via binder_proc_transaction()\nreturn a BR_TRANSACTION_PENDING_FROZEN error but they are still treated\nas successful since the target is expected to thaw at some point. It is\nthen not safe to access \u0027t\u0027 after BR_TRANSACTION_PENDING_FROZEN errors\nas the transaction could have been consumed by the now thawed target.\n\nThis is the case for binder_netlink_report() which derreferences \u0027t\u0027\nafter a pending frozen error, as pointed out by the following KASAN\nreport:\n\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in binder_netlink_report.isra.0+0x694/0x6c8\n  Read of size 8 at addr ffff00000f98ba38 by task binder-util/522\n\n  CPU: 4 UID: 0 PID: 522 Comm: binder-util Not tainted 6.19.0-rc6-00015-gc03e9c42ae8f #1 PREEMPT\n  Hardware name: linux,dummy-virt (DT)\n  Call trace:\n   binder_netlink_report.isra.0+0x694/0x6c8\n   binder_transaction+0x66e4/0x79b8\n   binder_thread_write+0xab4/0x4440\n   binder_ioctl+0x1fd4/0x2940\n   [...]\n\n  Allocated by task 522:\n   __kmalloc_cache_noprof+0x17c/0x50c\n   binder_transaction+0x584/0x79b8\n   binder_thread_write+0xab4/0x4440\n   binder_ioctl+0x1fd4/0x2940\n   [...]\n\n  Freed by task 488:\n   kfree+0x1d0/0x420\n   binder_free_transaction+0x150/0x234\n   binder_thread_read+0x2d08/0x3ce4\n   binder_ioctl+0x488/0x2940\n   [...]\n  ==================================================================\n\nInstead, make a transaction copy so the data can be safely accessed by\nbinder_netlink_report() after a pending frozen error. While here, add a\ncomment about not using t-\u003ebuffer in binder_netlink_report()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-14T16:27:14.167Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/a6050dedb6f1cc23e518e3a132ab74a0aad6df90"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e8a3d01544282e50d887d76f30d1496a0a53562"
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      ],
      "title": "binder: fix UAF in binder_netlink_report()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23184",
    "datePublished": "2026-02-14T16:27:14.167Z",
    "dateReserved": "2026-01-13T15:37:45.984Z",
    "dateUpdated": "2026-02-14T16:27:14.167Z",
    "state": "PUBLISHED"
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It is\\nthen not safe to access \u0027t\u0027 after BR_TRANSACTION_PENDING_FROZEN errors\\nas the transaction could have been consumed by the now thawed target.\\n\\nThis is the case for binder_netlink_report() which derreferences \u0027t\u0027\\nafter a pending frozen error, as pointed out by the following KASAN\\nreport:\\n\\n  ==================================================================\\n  BUG: KASAN: slab-use-after-free in binder_netlink_report.isra.0+0x694/0x6c8\\n  Read of size 8 at addr ffff00000f98ba38 by task binder-util/522\\n\\n  CPU: 4 UID: 0 PID: 522 Comm: binder-util Not tainted 6.19.0-rc6-00015-gc03e9c42ae8f #1 PREEMPT\\n  Hardware name: linux,dummy-virt (DT)\\n  Call trace:\\n   binder_netlink_report.isra.0+0x694/0x6c8\\n   binder_transaction+0x66e4/0x79b8\\n   binder_thread_write+0xab4/0x4440\\n   binder_ioctl+0x1fd4/0x2940\\n   [...]\\n\\n  Allocated by task 522:\\n   __kmalloc_cache_noprof+0x17c/0x50c\\n   binder_transaction+0x584/0x79b8\\n   binder_thread_write+0xab4/0x4440\\n   binder_ioctl+0x1fd4/0x2940\\n   [...]\\n\\n  Freed by task 488:\\n   kfree+0x1d0/0x420\\n   binder_free_transaction+0x150/0x234\\n   binder_thread_read+0x2d08/0x3ce4\\n   binder_ioctl+0x488/0x2940\\n   [...]\\n  ==================================================================\\n\\nInstead, make a transaction copy so the data can be safely accessed by\\nbinder_netlink_report() after a pending frozen error. While here, add a\\ncomment about not using t-\u003ebuffer in binder_netlink_report().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nbinder: corregir UAF en binder_netlink_report()\\n\\nLas transacciones unidireccionales enviadas a objetivos congelados a trav\u00e9s de binder_proc_transaction() devuelven un error BR_TRANSACTION_PENDING_FROZEN pero a\u00fan se tratan como exitosas ya que se espera que el objetivo se descongele en alg\u00fan momento. Por lo tanto, no es seguro acceder a \u0027t\u0027 despu\u00e9s de errores BR_TRANSACTION_PENDING_FROZEN, ya que la transacci\u00f3n podr\u00eda haber sido consumida por el objetivo ahora descongelado.\\n\\nEste es el caso de binder_netlink_report() que desreferencia \u0027t\u0027 despu\u00e9s de un error de congelaci\u00f3n pendiente, como lo se\u00f1ala el siguiente informe KASAN:\\n\\n  ==================================================================\\n  ERROR: KASAN: uso despu\u00e9s de liberaci\u00f3n de slab en binder_netlink_report.isra.0+0x694/0x6c8\\n  Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff00000f98ba38 por la tarea binder-util/522\\n\\n  CPU: 4 UID: 0 PID: 522 Comm: binder-util No contaminado 6.19.0-rc6-00015-gc03e9c42ae8f #1 PREEMPT\\n  Nombre del hardware: linux,dummy-virt (DT)\\n  Rastro de llamada:\\n   binder_netlink_report.isra.0+0x694/0x6c8\\n   binder_transaction+0x66e4/0x79b8\\n   binder_thread_write+0xab4/0x4440\\n   binder_ioctl+0x1fd4/0x2940\\n   [...]\\n\\n  Asignado por la tarea 522:\\n   __kmalloc_cache_noprof+0x17c/0x50c\\n   binder_transaction+0x584/0x79b8\\n   binder_thread_write+0xab4/0x4440\\n   binder_ioctl+0x1fd4/0x2940\\n   [...]\\n\\n  Liberado por la tarea 488:\\n   kfree+0x1d0/0x420\\n   binder_free_transaction+0x150/0x234\\n   binder_thread_read+0x2d08/0x3ce4\\n   binder_ioctl+0x488/0x2940\\n   [...]\\n  ==================================================================\\n\\nEn su lugar, haga una copia de la transacci\u00f3n para que los datos puedan ser accedidos de forma segura por binder_netlink_report() despu\u00e9s de un error de congelaci\u00f3n pendiente. Ya que estamos, a\u00f1ada un comentario sobre no usar t-\u0026gt;buffer en binder_netlink_report().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.18\",\"versionEndExcluding\":\"6.18.10\",\"matchCriteriaId\":\"32F6354D-FB80-4DEC-B5BD-29DA22C31C55\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB5B7DFC-C36B-45D8-922C-877569FDDF43\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5e8a3d01544282e50d887d76f30d1496a0a53562\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a6050dedb6f1cc23e518e3a132ab74a0aad6df90\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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