SB2026011483 - Red Hat Enterprise Linux 8 update for kernel

Description

This security bulletin contains information about 12 vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2025-38051)

CWE-ID: CWE-416 - Use After Free

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

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

The vulnerability exists due to a use-after-free error within the find_cifs_entry() function in fs/cifs/readdir.c. A local user can escalate privileges on the system.

2) Race condition (CVE-ID: CVE-2025-39825)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to a race condition within the cifs_rename2() function in fs/smb/client/inode.c. A local user can escalate privileges on the system.

3) Buffer overflow (CVE-ID: CVE-2025-39817)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 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

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

The vulnerability exists due to memory corruption within the efivarfs_d_compare() function in fs/efivarfs/super.c. A local user can perform a denial of service (DoS) attack.

4) Use-after-free (CVE-ID: CVE-2023-53401)

CWE-ID: CWE-416 - Use After Free

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

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

The vulnerability exists due to a use-after-free error within the mod_objcg_state(), consume_obj_stock(), drain_obj_stock() and refill_obj_stock() functions in mm/memcontrol.c. A local user can escalate privileges on the system.

5) Improper error handling (CVE-ID: CVE-2025-39883)

CWE-ID: CWE-388 - Error Handling

CVSSv4: 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

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

The vulnerability exists due to improper error handling within the unpoison_memory() function in mm/memory-failure.c. A local user can perform a denial of service (DoS) attack.

6) Input validation error (CVE-ID: CVE-2025-39898)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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

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

The vulnerability exists due to improper input validation within the e1000_set_eeprom() function in drivers/net/ethernet/intel/e1000e/ethtool.c. A local user can perform a denial of service (DoS) attack.

7) Buffer overflow (CVE-ID: CVE-2023-53513)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: 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

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

The vulnerability exists due to memory corruption within the nbd_set_size() and nbd_add_socket() functions in drivers/block/nbd.c. A local user can perform a denial of service (DoS) attack.

8) Out-of-bounds read (CVE-ID: CVE-2023-53680)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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

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

The vulnerability exists due to an out-of-bounds read error within the nfsd4_decode_compound() function in fs/nfsd/nfs4xdr.c. A local user can perform a denial of service (DoS) attack.

9) Out-of-bounds read (CVE-ID: CVE-2023-53675)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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

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

The vulnerability exists due to an out-of-bounds read error within the ses_enclosure_data_process() function in drivers/scsi/ses.c. A local user can perform a denial of service (DoS) attack.

10) Use-after-free (CVE-ID: CVE-2025-39993)

CWE-ID: CWE-416 - Use After Free

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

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

The vulnerability exists due to a use-after-free error within the display_open(), send_packet(), vfd_write(), lcd_write() and imon_disconnect() functions in drivers/media/rc/imon.c. A local user can escalate privileges on the system.

11) Out-of-bounds read (CVE-ID: CVE-2023-53705)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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

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

The vulnerability exists due to an out-of-bounds read error within the ipv6_find_tlv() function in net/ipv6/exthdrs_core.c. A local user can perform a denial of service (DoS) attack.

12) Use-after-free (CVE-ID: CVE-2025-68285)

CWE-ID: CWE-416 - Use After Free

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

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

The vulnerability exists due to a use-after-free error within the monmap_show() and osdmap_show() functions in net/ceph/debugfs.c. A local user can escalate privileges on the system.

Remediation

Install update from vendor's website.

References

• https://access.redhat.com/errata/RHSA-2026:0533