CVE-2026-53160 Details
Description
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: fix use-after-free race in fastrpc_map_create fastrpc_map_lookup returns a raw pointer after releasing fl->lock. The caller fastrpc_map_create then calls fastrpc_map_get (kref_get_unless_zero) on this unprotected pointer. A concurrent MEM_UNMAP can free the map between the lock release and the kref operation, resulting in a use-after-free on the freed slab object. Restore the take_ref parameter to fastrpc_map_lookup so the reference is acquired atomically under fl->lock before the pointer is exposed to the caller.
A use-after-free vulnerability has been identified in the Linux kernel's fastrpc implementation. The issue arises in the fastrpc_map_create function, which calls fastrpc_map_lookup to retrieve a map pointer. However, this pointer is returned without proper locking, allowing a concurrent memory unmap operation to free the map before it is safely used. This creates a race condition where the freed memory can be accessed, leading to potential exploitation. The vulnerability affects several versions of the Linux kernel.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been patched. Instructions for downloading the latest kernel version can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb | kernel.org | Patch |
| https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962 | kernel.org | Patch |
| https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532 | kernel.org | Patch |
| https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c | kernel.org | Patch |
| https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.1.156, < 6.1.176 >= 6.6.112, < 6.6.143 >= 6.12.53, < 6.12.94 >= 6.17.3, < 6.18.36 >= 6.19, < 7.0.13 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 7.1 rc6 7.1 rc7 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 6, 2026 | Initial Analysis | [email protected] |
| Jun 28, 2026 | CVE Modified | kernel.org |
| Jun 25, 2026 | New CVE Received | kernel.org |