Red Hat Enterprise Linux 7 update for kernel



Published: 2021-06-09
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-3347
CWE ID CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
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kpatch-patch-3_10_0-1160_6_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_2_2 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_2_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_21_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_15_2 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_11_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_25_1 (Red Hat package)
Operating systems & Components / Operating system package or component

kpatch-patch-3_10_0-1160_24_1 (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux for Power, little endian
Operating systems & Components / Operating system

Red Hat Enterprise Linux Server
Operating systems & Components / Operating system

Vendor Red Hat Inc.

Security Advisory

This security advisory describes one low risk vulnerability.

1) Use-after-free

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-3347

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error when handling PI futexes. A local user can run a specially crafted program to trigger a use-after-free error and execute arbitrary code with elevated privileges.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

kpatch-patch-3_10_0-1160_6_1 (Red Hat package): 1-3.el7, 1-5.el7

kpatch-patch-3_10_0-1160_2_2 (Red Hat package): 1-3.el7, 1-5.el7

kpatch-patch-3_10_0-1160_2_1 (Red Hat package): 1-3.el7, 1-5.el7

kpatch-patch-3_10_0-1160_21_1 (Red Hat package): 1-2.el7

kpatch-patch-3_10_0-1160_15_2 (Red Hat package): 1-2.el7, 1-4.el7

kpatch-patch-3_10_0-1160_11_1 (Red Hat package): 1-2.el7, 1-4.el7

kpatch-patch-3_10_0-1160 (Red Hat package): 1-3.el7, 1-5.el7

Red Hat Enterprise Linux for Power, little endian: 7

Red Hat Enterprise Linux Server: 7

kpatch-patch-3_10_0-1160_25_1 (Red Hat package): before 1-1.el7

kpatch-patch-3_10_0-1160_24_1 (Red Hat package): before 1-1.el7

CPE External links

https://access.redhat.com/errata/RHSA-2021:2285

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.



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