CVE-2026-98777
Received
Received - Intake
Memory Leak in Linux Kernel Binder Driver
Vulnerability report for CVE-2026-98777, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-18
Last updated on: 2026-10-18
Assigner: kernel.org
Description
Description
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in a frozen process, the outdated transaction is freed with kfree()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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 9864bb4801331daa48514face9d0f4861e4d485b |
| Linux | Linux | 9864bb4801331daa48514face9d0f4861e4d485b |
| Linux | Linux | 9864bb4801331daa48514face9d0f4861e4d485b |
| Linux | Linux | 9864bb4801331daa48514face9d0f4861e4d485b |
| Linux | Linux | 6.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
