Fedora 32 update for kernel, kernel-headers, kernel-tools



| Updated: 2025-04-25
Risk Low
Patch available YES
Number of vulnerabilities 5
CVE-ID CVE-2020-8694
CVE-2020-27673
CVE-2020-25668
CVE-2020-25704
CVE-2020-25656
CWE-ID CWE-284
CWE-20
CWE-416
CWE-401
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Fedora
Operating systems & Components / Operating system

kernel-tools
Operating systems & Components / Operating system package or component

kernel-headers
Operating systems & Components / Operating system package or component

kernel
Operating systems & Components / Operating system package or component

Vendor Fedoraproject

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Improper access control

EUVDB-ID: #VU48371

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-8694

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the Linux kernel driver. A local user can bypass implemented security restrictions and gain unauthorized access to sensitive information on the system.

Affected products:

Product Collection

Vertical Segment

CPUID

8th Generation Intel® Core™ Processor Family

Mobile

806E9

10th Generation Intel® Core™ Processor Family

Mobile

806EC

8th Generation Intel® Core™ Processor Family

Mobile

906EA

9th Generation Intel® Core™ Processor Family

Mobile

906EC

8th Generation Intel® Core™ Processor Family

Desktop

906EA

9th Generation Intel® Core™ Processor Family

Desktop

906EC

Intel® Xeon® Processor E Family

Server Workstation AMT Server

906EA

8th Generation Intel® Core™ Processor Family

Mobile

806EA

8th Generation Intel® Core™ Processor Family Intel® Pentium® Gold Processor Series Intel® Celeron® Processor G Series

Desktop

906EB

Intel® Xeon® Processor E Family

Server Workstation AMT Server

906EA

8th Generation Intel® Core™ Processor Family

Desktop

906EA

9th Generation Intel® Core™ Processor Family

Desktop

906ED

9th Generation Intel® Core™ Processor Family

Desktop

906ED

10th Generation Intel® Core™ Processor Family

Mobile

A0660

10th Generation Intel® Core™ Processor Family

Mobile

A0661

10th Generation Intel® Core™ Processor Family

Mobile

806EC

10th Generation Intel® Core™ Processor Family

Desktop

A0653

10th Generation Intel® Core™ Processor Family

Mobile

A0655

10th Generation Intel® Core™ Processor Family

Mobile

A0652

Intel® Pentium® Processor Silver Series Intel® Celeron® Processor J Series Intel® Celeron® Processor N Series

Desktop Mobile Embedded

706A1

Intel® Pentium® Processor Silver Series Intel® Celeron® Processor J Series Intel® Celeron® Processor N Series

Desktop Mobile Embedded

706A8

10th Generation Intel® Core™ Processor Family

Mobile

706E5

8th Generation Intel® Core™ Processor Family

Mobile

906E9

7th Generation Intel® Core™ Processor Family

Mobile Embedded

906E9

8th Generation Intel® Core™  Processor Family

Mobile

806EA

7th Generation Intel® Core™ Processor Family

Desktop Embedded

906E9

7th Generation Intel® Core™ Processor Family

Mobile

806E9

7th Generation Intel® Core™

Processor Family

Mobile

806E9

Intel® Core™ X-series Processors

Desktop

906E9

Intel® Xeon® Processor E3 v6 Family

Server Workstation AMT Server

906E9

7th Generation Intel® Core™ Processor Family

Mobile

806E9

6th Generation Intel® Core™ Processor Family

Mobile

506E3

6th Generation Intel® Core™ Processor Family

Desktop Embedded

506E3

6th Generation Intel® Core™ Processors

Mobile

406E3

6th Generation Intel® Core™ Processor Family

Mobile

406E3

Intel® Xeon® Processor E3 v5 Family

Server Workstation AMT Server

506E3

6th Generation Intel® Core™ Processor Family

Mobile

406E3

8th Generation Intel® Core™ Processors

Mobile

806EB

8th Generation Intel® Core™ Processors

Mobile

806EC

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 32

kernel-tools: before 5.9.7-100.fc32

kernel-headers: before 5.9.7-100.fc32

kernel: before 5.9.8-100.fc32

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-e211716d08


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU94154

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27673

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the clear_linked(), consume_one_event(), __evtchn_fifo_handle_events() and evtchn_fifo_percpu_init() functions in drivers/xen/events/events_fifo.c, within the module_param(), DEFINE_RWLOCK(), enable_dynirq(), notify_remote_via_irq(), EXPORT_SYMBOL_GPL(), xen_irq_init(), xen_free_irq(), xen_send_IPI_one(), __xen_evtchn_do_upcall(), xen_setup_callback_vector(), xen_evtchn_cpu_prepare() and xen_init_IRQ() functions in drivers/xen/events/events_base.c, within the active_evtchns() and evtchn_2l_handle_events() functions in drivers/xen/events/events_2l.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 32

kernel-tools: before 5.9.7-100.fc32

kernel-headers: before 5.9.7-100.fc32

kernel: before 5.9.8-100.fc32

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-e211716d08


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Use-after-free

EUVDB-ID: #VU83431

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-25668

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local authenticated user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the con_font_op. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 32

kernel-tools: before 5.9.7-100.fc32

kernel-headers: before 5.9.7-100.fc32

kernel: before 5.9.8-100.fc32

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-e211716d08


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Memory leak

EUVDB-ID: #VU55258

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-25704

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the Linux kernel performance monitoring subsystem when using PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of service.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 32

kernel-tools: before 5.9.7-100.fc32

kernel-headers: before 5.9.7-100.fc32

kernel: before 5.9.8-100.fc32

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-e211716d08


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Use-after-free

EUVDB-ID: #VU51547

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-25656

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a use-after-free error in the way the console subsystem uses KDGKBSENT and KDSKBSENT IOCTLs. A local user can run a specially crafted program to trigger an out-of-bounds read and gain access to sensitive information.


Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 32

kernel-tools: before 5.9.7-100.fc32

kernel-headers: before 5.9.7-100.fc32

kernel: before 5.9.8-100.fc32

CPE2.3 External links

https://bodhi.fedoraproject.org/updates/FEDORA-2020-e211716d08


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



###SIDEBAR###