---
id: CVE-2026-68322
title: 'rds: Fix inet6_addr_lst NULL dereference when IPv6 is disabled'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rds: Fix inet6_addr_lst NULL dereference when IPv6 is disabled

  When booting with the 'ipv6.disable=1' parameter, inet6_addr_lst
  is never initialized because inet6_init…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 <
    7809344be3f0c1bbfdfdde1cefafeec14bf52d51
  - >-
    Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 <
    438dec9b0a06bd1f8db8c58539c655e735e17367
  - >-
    Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 <
    b61c9eb5931bb7389bc104faacd8c17d910da65d
  - >-
    Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 <
    8e48d7ab1e01936a172ff31531904b003895fd8c
  - >-
    Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 <
    a8302e758050e6a922765aee8d220a4fd350f52d
  - >-
    Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 <
    f6787fdffcae5490c779f0f3f33b11597525d1ae
  - >-
    Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 <
    00d5707217b5972554898ff734ae7b71bce704e6
  - >-
    Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 <
    9c805e592a29be9e4e61ff1bd567da04aa8fd6f9
  - Linux 4.19
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:47:08.773587Z'
published: '2026-08-10'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:13.018Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68322'
references:
  - url: 'https://git.kernel.org/stable/c/7809344be3f0c1bbfdfdde1cefafeec14bf52d51'
  - url: 'https://git.kernel.org/stable/c/438dec9b0a06bd1f8db8c58539c655e735e17367'
  - url: 'https://git.kernel.org/stable/c/b61c9eb5931bb7389bc104faacd8c17d910da65d'
  - url: 'https://git.kernel.org/stable/c/8e48d7ab1e01936a172ff31531904b003895fd8c'
  - url: 'https://git.kernel.org/stable/c/a8302e758050e6a922765aee8d220a4fd350f52d'
  - url: 'https://git.kernel.org/stable/c/f6787fdffcae5490c779f0f3f33b11597525d1ae'
  - url: 'https://git.kernel.org/stable/c/00d5707217b5972554898ff734ae7b71bce704e6'
  - url: 'https://git.kernel.org/stable/c/9c805e592a29be9e4e61ff1bd567da04aa8fd6f9'
tags:
  - cve.org
epss: 0.00216
epssPercentile: 0.12151
ingestedAt: '2026-11-06T18:00:12.612Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

rds: Fix inet6_addr_lst NULL dereference when IPv6 is disabled

When booting with the 'ipv6.disable=1' parameter, inet6_addr_lst
is never initialized because inet6_init() exits before addrconf_init()
is called to initialize it. An attempt to bind an RDS socket to
an ipv6 address results in a crash in __ipv6_chk_addr_and_flags()

KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
RIP: 0010:__ipv6_chk_addr_and_flags+0x1df/0x7e0
Call Trace:
 <TASK>
 ipv6_chk_addr+0x3b/0x50
 rds_tcp_laddr_check+0x155/0x3b0 [rds_tcp]
 rds_trans_get_preferred+0x15d/0x2d0 [rds]
 ? trace_hardirqs_on+0x2d/0x110
 rds_bind+0x1433/0x1d60 [rds]
 ? rds_remove_bound+0xd50/0xd50 [rds]
 ? aa_af_perm+0x250/0x250
 ? __might_fault+0xde/0x190
 ? __sys_bind+0x1dc/0x210
 __sys_bind+0x1dc/0x210
 ? __ia32_sys_socketpair+0x100/0x100
 ? restore_fpregs_from_fpstate+0x53/0x100
 __x64_sys_bind+0x73/0xb0
 ? syscall_enter_from_user_mode+0x1c/0x50
 do_syscall_64+0x34/0x80
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f47f8269ea9
 </TASK>

The following code reproduces the issue:

struct sockaddr_in6 addr;
s = socket(PF_RDS, SOCK_SEQPACKET, 0);

memset(&addr, 0, sizeof(addr));
inet_pton(AF_INET6, ADDRESS, &addr.sin6_addr);
addr.sin6_family = AF_INET6;
addr.sin6_port = htons(PORT);

bind(s, &addr, sizeof(addr));

Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with Syzkaller.

## Affected

- `Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 < 7809344be3f0c1bbfdfdde1cefafeec14bf52d51`
- `Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 < 438dec9b0a06bd1f8db8c58539c655e735e17367`
- `Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 < b61c9eb5931bb7389bc104faacd8c17d910da65d`
- `Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 < 8e48d7ab1e01936a172ff31531904b003895fd8c`
- `Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 < a8302e758050e6a922765aee8d220a4fd350f52d`
- `Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 < f6787fdffcae5490c779f0f3f33b11597525d1ae`
- `Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 < 00d5707217b5972554898ff734ae7b71bce704e6`
- `Linux >= eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 < 9c805e592a29be9e4e61ff1bd567da04aa8fd6f9`
- `Linux 4.19`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.