What is CVE-2026-45846?

CVE-2026-45846 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.7 onward and patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-45846 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-45846?

CVE-2026-45846 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-45846?

Yes, CVE-2026-45846 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-45846 actively exploited?

CVE-2026-45846 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-45846

In the Linux kernel, the following vulnerability has been resolved: bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst() bareudp_fill_metadata_dst() passes bareudp->sock to udp_tunnel6_dst_lookup() in the IPv6 path without a NULL check. The socket is only created in bareudp_open() and NULLed in bareudp_stop(), so calling this function while the device is down triggers a NULL dereference via sock->sk. BUG: kernel NULL pointer dereference, address: 0000000000000018 RIP: 0010:udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:160) Call Trace: <TASK> bareudp_fill_metadata_dst (drivers/net/bareudp.c:532) do_execute_actions (net/openvswitch/actions.c:901) ovs_execute_actions (net/openvswitch/actions.c:1589) ovs_packet_cmd_execute (net/openvswitch/datapath.c:700) genl_family_rcv_msg_doit (net/netlink/genetlink.c:1114) genl_rcv_msg (net/netlink/genetlink.c:1209) netlink_rcv_skb (net/netlink/af_netlink.c:2550) </TASK> Add a NULL check returning -ESHUTDOWN, consistent with the xmit paths in the same driver.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-06-01

Patch available

Yes

Affected versions

Linux kernel versions 5.7 and later are affected. Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1-rc2 and their respective stable series.

Affected from

≥ 5.7

Fixed in

✓ 5.10.258 5.10.x ✓ 5.15.209 5.15.x ✓ 6.1.175 6.1.x ✓ 6.6.141 6.6.x ✓ 6.12.91 6.12.x ✓ 6.18.33 6.18.x ✓ 7.0.10 7.0.x ✓ 7.1-rc2

References

The following references provide additional information about CVE-2026-45846 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/31e010a106ff6cd8ccac4bfee547fd3fa1015574
Patch
Kernel patch commit
https://git.kernel.org/stable/c/35a115a204be08f97450b0389413e218268ef4a2
Patch
Kernel patch commit
https://git.kernel.org/stable/c/51eef9c072aa3405a6823a96ae666d38a3b48750
Patch

8 patch commits total View all on NVD

Frequently asked questions

What is CVE-2026-45846?

CVE-2026-45846 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.7 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-45846 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-45846?

Yes — CVE-2026-45846 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-45846 actively exploited?

No — CVE-2026-45846 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.