Red Hat Enterprise Linux 6 Extended Lifecycle Support update for kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2023-31436 CVE-2023-3611 CVE-2023-3776 CVE-2023-4921 |
| CWE-ID | CWE-787 CWE-416 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) Operating systems & Components / Operating system Red Hat Enterprise Linux Server - Extended Life Cycle Support Operating systems & Components / Operating system kernel (Red Hat package) Operating systems & Components / Operating system package or component |
| Vendor | Red Hat Inc. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Out-of-bounds write
EUVDB-ID: #VU76098
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-31436
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
Description The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the qfq_change_class() function in net/sched/sch_qfq.c. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
Install updates from vendor's website.
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems): 6.0
Red Hat Enterprise Linux Server - Extended Life Cycle Support: 6.0
kernel (Red Hat package): before 2.6.32-754.53.1.el6
External linkshttp://access.redhat.com/errata/RHSA-2024:1831
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) Out-of-bounds write
EUVDB-ID: #VU78943
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]
CVE-ID: CVE-2023-3611
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
Description The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the qfq_change_agg() function in net/sched/sch_qfq.c within the Linux kernel net/sched: sch_qfq component. A local user trigger an out-of-bounds write and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems): 6.0
Red Hat Enterprise Linux Server - Extended Life Cycle Support: 6.0
kernel (Red Hat package): before 2.6.32-754.53.1.el6
External linkshttp://access.redhat.com/errata/RHSA-2024:1831
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: #VU79285
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-3776
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the the Linux kernel's net/sched: cls_fw component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
Install updates from vendor's website.
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems): 6.0
Red Hat Enterprise Linux Server - Extended Life Cycle Support: 6.0
kernel (Red Hat package): before 2.6.32-754.53.1.el6
External linkshttp://access.redhat.com/errata/RHSA-2024:1831
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) Use-after-free
EUVDB-ID: #VU81693
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]
CVE-ID: CVE-2023-4921
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the qfq_dequeue() function within the the Linux kernel's net/sched: sch_qfq component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
Install updates from vendor's website.
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems): 6.0
Red Hat Enterprise Linux Server - Extended Life Cycle Support: 6.0
kernel (Red Hat package): before 2.6.32-754.53.1.el6
External linkshttp://access.redhat.com/errata/RHSA-2024:1831
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.
