What is CVE-2026-98849?

CVE-2026-98849 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.10 onward and patched in 6.12.113, 6.18.56, 7.2.10 and others. CVE-2026-98849 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-98849?

CVE-2026-98849 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-98849?

Yes, CVE-2026-98849 has been patched. Fixed versions include 6.12.113, 6.18.56, 7.2.10 and others. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-98849 actively exploited?

CVE-2026-98849 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-98849

In the Linux kernel, the following vulnerability has been resolved: pfcp: fix socket lifetime on netdevice registration failure pfcp_newlink() creates the UDP socket before register_netdevice(). If registration fails after pfcp_dev_init() succeeds, the core calls pfcp_dev_uninit(), which releases the socket and clears pfcp->sk. The newlink error path then releases it again, causing a NULL pointer dereference. This was observed with failslab fault injection: FAULT_INJECTION: forcing a failure. kobject: kobject_add_internal failed for pfcp0 (error: -12 parent: net) BUG: KASAN: null-ptr-deref in udp_tunnel_sock_release+0x1c/0x50 Read of size 8 at addr 0000000000000120 by task ip/1037 Call trace: show_stack+0x18/0x24 (C) dump_stack_lvl+0x78/0x90 print_report+0x468/0x5cc kasan_report+0xa4/0xf0 __asan_load8+0x7c/0xd0 udp_tunnel_sock_release+0x1c/0x50 pfcp_newlink+0x128/0x184 rtnl_newlink+0x848/0xe44 rtnetlink_rcv_msg+0x468/0x514 netlink_rcv_skb+0xc0/0x1f0 rtnetlink_rcv+0x18/0x24 netlink_unicast+0x4b8/0x558 netlink_sendmsg+0x2b8/0x584 ... Return from pfcp_del_sock() if pfcp->sk is NULL.

Package Linux Kernel

Published 2026-10-18

Last modified 2026-10-18

Patch available

Yes

Affected versions

Linux kernel versions 6.10 and later are affected. Fixed in 6.12.113, 6.18.56, 7.2.10, 7.3 and their respective stable series.

Affected from

≥ 6.10

Fixed in

✓ 6.12.113 6.12.x ✓ 6.18.56 6.18.x ✓ 7.2.10 7.2.x ✓ 7.3

References

4 total

Frequently asked questions

What is CVE-2026-98849?

CVE-2026-98849 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.10 onward and has been patched in 6.12.113, 6.18.56, 7.2.10 and others. CVE-2026-98849 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-98849?

Yes. CVE-2026-98849 has been patched. Fixed versions include 6.12.113, 6.18.56, 7.2.10 and others. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-98849 actively exploited?

No. CVE-2026-98849 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.