In the Linux kernel, the following vulnerability has been resolved:

misc: fastrpc: Fix use-after-free race condition for maps

It is possible that in between calling fastrpc_map_get() until
map->fl->lock is taken in fastrpc_free_map(), another thread can call
fastrpc_map_lookup() and get a reference to a map that is about to be
deleted.

Rewrite fastrpc_map_get() to only increase the reference count of a map
if it's non-zero. Propagate this to callers so they can know if a map is
about to be deleted.

Fixes this warning:
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate
...
Call trace:
refcount_warn_saturate
[fastrpc_map_get inlined]
[fastrpc_map_lookup inlined]
fastrpc_map_create
fastrpc_internal_invoke
fastrpc_device_ioctl
__arm64_sys_ioctl
invoke_syscall

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00017.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 affected < 556dfdb226ce1e5231d8836159b23f8bb0395bf4
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 affected < b171d0d2cf1b8387c72c8d325c5d5746fa271e39
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 affected < 61a0890cb95afec5c8a2f4a879de2b6220984ef1
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 affected < 079c78c68714f7d8d58e66c477b0243b31806907
c68cfb718c8f97b7f7a50ed66be5feb42d0c8988 affected < 96b328d119eca7563c1edcc4e1039a62e6370ecb
Linux Linux affected
Version Status Constraints
5.1 affected —
0 unaffected < 5.1
5.4.230 unaffected ≤ 5.4.*
5.10.165 unaffected ≤ 5.10.*
5.15.90 unaffected ≤ 5.15.*
6.1.8 unaffected ≤ 6.1.*
6.2 unaffected ≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/079c78c68714f7d8d58e66c477b0243b31806907 cve-icon cve-icon
https://git.kernel.org/stable/c/556dfdb226ce1e5231d8836159b23f8bb0395bf4 cve-icon cve-icon
https://git.kernel.org/stable/c/61a0890cb95afec5c8a2f4a879de2b6220984ef1 cve-icon cve-icon
https://git.kernel.org/stable/c/96b328d119eca7563c1edcc4e1039a62e6370ecb cve-icon cve-icon
https://git.kernel.org/stable/c/b171d0d2cf1b8387c72c8d325c5d5746fa271e39 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024082106-CVE-2022-48872-6010@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-48872 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-48872 cve-icon
History

Wed, 11 Sep 2024 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 06 Sep 2024 14:45:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-416
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Wed, 21 Aug 2024 21:00:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 21 Aug 2024 06:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix use-after-free race condition for maps It is possible that in between calling fastrpc_map_get() until map->fl->lock is taken in fastrpc_free_map(), another thread can call fastrpc_map_lookup() and get a reference to a map that is about to be deleted. Rewrite fastrpc_map_get() to only increase the reference count of a map if it's non-zero. Propagate this to callers so they can know if a map is about to be deleted. Fixes this warning: refcount_t: addition on 0; use-after-free. WARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcount_warn_saturate ... Call trace: refcount_warn_saturate [fastrpc_map_get inlined] [fastrpc_map_lookup inlined] fastrpc_map_create fastrpc_internal_invoke fastrpc_device_ioctl __arm64_sys_ioctl invoke_syscall
Title misc: fastrpc: Fix use-after-free race condition for maps
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-05-04T08:25:13.379Z

Reserved: 2024-07-16T11:38:08.921Z

Link: CVE-2022-48872

cve-icon Vulnrichment

Updated: 2024-09-11T12:42:11.924Z

cve-icon NVD

Status : Analyzed

Published: 2024-08-21T07:15:04.267

Modified: 2024-09-06T14:30:06.730

Link: CVE-2022-48872

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-08-21T00:00:00Z

Links: CVE-2022-48872 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses