rds: Fix inet6_addr_lst NULL dereference when IPv6 is disabled
Summary
| CVE | CVE-2026-68322 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2026-08-10 13:20:22 UTC |
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| Updated | 2026-08-10 13:20:22 UTC |
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| Description | 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. |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 8e48d7ab1e01936a172ff31531904b003895fd8c git |
Not specified |
| CNA |
Linux |
Linux |
affected eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 a8302e758050e6a922765aee8d220a4fd350f52d git |
Not specified |
| CNA |
Linux |
Linux |
affected eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 f6787fdffcae5490c779f0f3f33b11597525d1ae git |
Not specified |
| CNA |
Linux |
Linux |
affected eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 00d5707217b5972554898ff734ae7b71bce704e6 git |
Not specified |
| CNA |
Linux |
Linux |
affected eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 9c805e592a29be9e4e61ff1bd567da04aa8fd6f9 git |
Not specified |
| CNA |
Linux |
Linux |
affected 4.19 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 4.19 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.151 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.103 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.44 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1.6 7.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2-rc5 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/f6787fdffcae5490c779f0f3f33b11597525d1ae |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/00d5707217b5972554898ff734ae7b71bce704e6 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/8e48d7ab1e01936a172ff31531904b003895fd8c |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/9c805e592a29be9e4e61ff1bd567da04aa8fd6f9 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/a8302e758050e6a922765aee8d220a4fd350f52d |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.