SB2026063085 - Red Hat Enterprise Linux for NVIDIA update for kernel
Published: June 30, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 vulnerabilities.
1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-31431)
CWE-ID: CWE-664 - Improper control of a resource through its lifetime
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:A/U:Amber
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper memory handling within the authencesn cryptographic template in algif_aead when processing AEAD operations. A local user can trigger the vulnerable code path to execute arbitrary code on the system.
Note, this vulnerability was dubbed "Copy Fail".
2) Stack-based buffer overflow (CVE-ID: CVE-2026-43037)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to a stack-based buffer overflow in ip4ip6_err() and __ip_options_echo() when processing a crafted packet that triggers ICMP error handling on a cloned skb. A remote attacker can send a specially crafted packet to execute arbitrary code.
The issue is caused by reusing skb cb[] data written by the IPv6 receive path as IPv4 metadata, allowing attacker-controlled packet data to influence the copied option length.
3) Resource management error (CVE-ID: CVE-2026-43284)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/U:Amber
The vulnerability allows a local user to escalate privileges on the system.
The xfrm-ESP Page-Cache Write vulnerability exists due to improper management of internal resources in esp_input() function in net/ipv4/esp4.c and esp6_input() function in net/ipv6/esp6.c. A local user can execute arbitrary code with root privileges.
Note, this is one of two vulnerabilities reported as Dirty Frag.
4) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-46300)
CWE-ID: CWE-664 - Improper control of a resource through its lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to improper state management in skb_try_coalesce() when transferring paged fragments during TCP receive coalescing. A local user can trigger packet processing that moves shared fragments into an unmarked skb to cause memory corruption.
The issue can lead ESP input to incorrectly treat an uncloned nonlinear skb as not having shared fragments and perform in-place decryption over externally owned or page-cache-backed fragments.
5) Improper access control (CVE-ID: CVE-2026-46333)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Clear
The vulnerability allows a local privileged user to disclose sensitive information.
The vulnerability exists due to improper access control in ptrace_may_access() when checking dumpability for tasks without an associated mm pointer. A local privileged user can inspect kernel thread details to disclose sensitive information.
The issue affects cases involving threads that no longer have a VM or never had one, such as kernel threads.
6) Improper input validation (CVE-ID: CVE-2026-46243)
CWE-ID: CWE-20 - Improper input validation
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 disclose sensitive information, modify data, or cause a denial of service.
The vulnerability exists due to improper input validation in the cifs.spnego key description handling in fs/smb/client/cifs_spnego.c when processing userspace-created cifs.spnego keys through request_key(2) or add_key(2). A local user can supply a crafted cifs.spnego description to disclose sensitive information, modify data, or cause a denial of service.
The issue arises because authority-bearing fields such as pid, uid, creduid, and upcall_target may be treated by cifs.upcall as kernel-originating inputs.
Remediation
Install update from vendor's website.