CVE-2026-53160
misc: fastrpc: fix use-after-free race in fastrpc_map_create
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.
INFO
Published Date :
June 25, 2026, 9:16 a.m.
Last Modified :
July 6, 2026, 4:41 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Acquire references atomically under fl->lock.
- Restore take_ref parameter to fastrpc_map_lookup.
- Ensure pointer is protected before exposure.
- Update the Linux kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53160.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53160 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53160
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-53160 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53160 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jul. 06, 2026
Action Type Old Value New Value Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1.156 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.12.53 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.17.3 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.112 up to (excluding) 6.6.143 Added Reference Type kernel.org: https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '0b70ec82b309a4093106ff399da1911ad23b52d3', 'lessThan': '0a3b87293fbd34fda651e6aead9964f84b893962', 'versionType': 'git'}, {'status': 'affected', 'version': 'd7513b47082c08105e837b06cebeb3f07a5fa56f', 'lessThan': '8b080c89183196fd3e49212f2a1a1c4a29335b9c', 'versionType': 'git'}, {'status': 'affected', 'version': '802359a52676176b18713e33caa17572ad009057', 'lessThan': '5b0166112019d1dce30b976ab28fd67f7f0be532', 'versionType': 'git'}, {'status': 'affected', 'version': '10df039834f84a297c72ec962c0f9b7c8c5ca31a', 'lessThan': '992f121796b7ca83a5a8b93da24e971363206218', 'versionType': 'git'}, {'status': 'affected', 'version': '10df039834f84a297c72ec962c0f9b7c8c5ca31a', 'lessThan': 'f20f6512ecb75c816e0debf4551a138f098615c4', 'versionType': 'git'}, {'status': 'affected', 'version': '10df039834f84a297c72ec962c0f9b7c8c5ca31a', 'lessThan': '07ebe87915d8accdaba20c4f88c5ae430fe62fbb', 'versionType': 'git'}, {'status': 'affected', 'version': 'f3f59bab68e9bc714f757ab22f3fb36153014043', 'versionType': 'git'}, {'status': 'affected', 'version': '6.1.156', 'lessThan': '6.1.176', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.112', 'lessThan': '6.6.143', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.53', 'lessThan': '6.12.94', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.17.3', 'lessThan': '6.18', 'versionType': 'semver'}], 'programFiles': ['drivers/misc/fastrpc.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.18'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.18', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/misc/fastrpc.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb Added Reference https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962 Added Reference https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532 Added Reference https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c Added Reference https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218 Added Reference https://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4