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
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}
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"dateUpdated": "2026-02-14T16:27:14.167Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/5e8a3d01544282e50d887d76f30d1496a0a53562"
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"title": "binder: fix UAF in binder_netlink_report()",
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"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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"nvd": "{\"cve\":{\"id\":\"CVE-2026-23184\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T17:15:56.167\",\"lastModified\":\"2026-02-14T17:15:56.167\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"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().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5e8a3d01544282e50d887d76f30d1496a0a53562\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a6050dedb6f1cc23e518e3a132ab74a0aad6df90\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- 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.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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