CVE-2026-98646

/// Technical description

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

tcp: Skip cond_resched() in inet_csk_listen_stop() under BPF context

bpf_sock_destroy() runs from the tcp iterator, under rcu_read_lock(). If

the sock is a listener that still has children in its accept queue,

tcp_abort() ends up in inet_csk_listen_stop() and the cond_resched()

there trips the debug check:

BUG: sleeping function called from invalid context at net/ipv4/inet_connection_sock.c:1523

in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 628, name: test_progs

preempt_count: 0, expected: 0

RCU nest depth: 1, expected: 0

locks held by test_progs/628: 3, last CPU#3:

#0: ffff8881158cee18 (&p->lock){+.+.}-{4:4}, at: bpf_seq_read+0x56/0x1210

#1: ffff8881106bb858 (sk_lock-AF_INET6){+.+.}-{0:0}, at: bpf_iter_tcp_seq_show+0x32b/0x4b0

#2: ffffffffb435af20 (rcu_read_lock){....}-{1:3}, at: bpf_iter_run_prog+0x46b/0xde0

CPU: 3 UID: 0 PID: 628 Comm: test_progs Tainted: G W 7.2.0+ #65 PREEMPT

Tainte

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References