SB20260610115 - Red Hat Enterprise Linux 7 Extended Lifecycle Support update for kernel
Published: June 10, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2026-31532)
CWE-ID: CWE-416 - Use After Free
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 cause a denial of service.
The vulnerability exists due to a use-after-free in raw_rcv() when processing CAN frames after a raw CAN socket is released. A local user can trigger concurrent socket release and packet reception to cause a denial of service.
The issue involves the percpu uniq storage referenced through RCU-delayed receiver deletion.
2) Heap-based buffer overflow (CVE-ID: CVE-2026-31607)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service or execute arbitrary code.
The vulnerability exists due to a heap-based buffer overflow in usbip_pack_ret_submit() when processing a RET_SUBMIT response from a USB/IP server. A remote attacker can send a specially crafted response with an oversized number_of_packets value to cause a denial of service or execute arbitrary code.
The issue occurs because the response value is later used as the loop bound for accesses to urb->iso_frame_desc[], whose allocation size was determined by the original submission.
3) Improper input validation (CVE-ID: CVE-2026-31685)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in ip6t_eui64 when processing packets with an invalid MAC header. A remote attacker can send a specially crafted packet to cause a denial of service.
4) Use-after-free (CVE-ID: CVE-2026-43163)
CWE-ID: CWE-416 - Use After Free
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 cause a denial of service.
The vulnerability exists due to a use-after-free race in write_page() when resizing an array while bitmap daemon work is iterating over bitmap->storage.filemap. A local user can trigger concurrent bitmap update and resize operations to cause a denial of service.
The issue occurs because the md thread can continue running during quiesce(), allowing concurrent access to freed pages.
Remediation
Install update from vendor's website.