{"id":"CVE-2025-38727","revision":"6f3573111748478f9706bb3924e6cc2d","records":[{"revision":"6f3573111748478f9706bb3924e6cc2d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-38727","aliases":[],"title":"netlink: avoid infinite retry looping in netlink_unicast()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: avoid infinite retry looping in netlink_unicast()\n\nnetlink_attachskb() checks for the socket's read memory allocation\nconstraints. Firstly, it has:\n\n rmem < READ_ONCE(sk->sk_rcvbuf)\n\nto check if the just increased rmem value fits into the socket's receive\nbuffer. If not, it proceeds and tries to wait for the memory under:\n\n rmem + skb->truesize > READ_ONCE(sk->sk_rcvbuf)\n\nThe checks don't cover the case when skb->truesize + sk->sk_rmem_alloc is\nequal to sk->sk_rcvbuf. Thus the function neither successfully accepts\nthese conditions, nor manages to reschedule the task - and is called in\nretry loop for indefinite time which is caught as:\n\n rcu: INFO: rcu_sched self-detected stall on CPU\n rcu: 0-....: (25999 ticks this GP) idle=ef2/1/0x4000000000000000 softirq=262269/262269 fqs=6212\n (t=26000 jiffies g=230833 q=259957)\n NMI backtrace for cpu 0\n CPU: 0 PID: 22 Comm: kauditd Not tainted 5.10.240 #68\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-4.fc42 04/01/2014\n Call Trace:\n \n dump_stack lib/dump_stack.c:120\n nmi_cpu_backtrace.cold lib/nmi_backtrace.c:105\n nmi_trigger_cpumask_backtrace lib/nmi_backtrace.c:62\n rcu_dump_cpu_stacks kernel/rcu/tree_stall.h:335\n rcu_sched_clock_irq.cold kernel/rcu/tree.c:2590\n update_process_times kernel/time/timer.c:1953\n tick_sched_handle kernel/time/tick-sched.c:227\n tick_sched_timer kernel/time/tick-sched.c:1399\n __hrtimer_run_queues kernel/time/hrtimer.c:1652\n hrtimer_interrupt kernel/time/hrtimer.c:1717\n __sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113\n asm_call_irq_on_stack arch/x86/entry/entry_64.S:808\n \n\n netlink_attachskb net/netlink/af_netlink.c:1234\n netlink_unicast net/netlink/af_netlink.c:1349\n kauditd_send_queue kernel/audit.c:776\n kauditd_thread kernel/audit.c:897\n kthread kernel/kthread.c:328\n ret_from_fork arch/x86/entry/entry_64.S:304\n\nRestore the original behavior of the check which commit in Fixes\naccidentally missed when restructuring the code.\n\nFound by Linux Verification Center (linuxtesting.org).","state":0,"publishedAt":"2025-09-04T15:33:25.286+00:00","modifiedAt":"2026-10-15T01:07:51.216+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/netlink/af_netlink.c\"\n ],\n \"versions\": [\n {\n \"version\": \"9da025150b7c14a8390fc06aea314c0a4011e82c\",\n \"lessThan\": \"47d49fd07f86d1f55ea1083287303d237e9e0922\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c4ceaac5c5ba0b992ee1dc88e2a02421549e5c98\",\n \"lessThan\": \"6bee383ff83352a693d03efdf27cdd80742f71b2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"fd69af06101090eaa60b3d216ae715f9c0a58e5b\",\n \"lessThan\": \"f324959ad47e62e3cadaffa65d3cff790fb48529\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"76602d8e13864524382b0687dc32cd8f19164d5a\",\n \"lessThan\": \"d42b71a34f6b8a2d5c53df81169b03b8d8b5cf4e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"55baecb9eb90238f60a8350660d6762046ebd3bd\",\n \"lessThan\": \"346c820ef5135cf062fa3473da955ef8c5fb6929\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4b8e18af7bea92f8b7fb92d40aeae729209db250\",\n \"lessThan\": \"44ddd7b1ae0b7edb2c832eb16798c827a05e58f0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"cd7ff61bfffd7000143c42bbffb85eeb792466d6\",\n \"lessThan\": \"78fcd69d55c5f11d7694c547eca767a1cfd38ec4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc\",\n \"lessThan\": \"e8edc7de688791a337c068693f22e8d8b869df71\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"ae8f160e7eb24240a2a79fc4c815c6a0d4ee16cc\",\n \"lessThan\": \"759dfc7d04bab1b0b86113f1164dc1fec192b859\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.4.296\",\n \"lessThan\": \"5.4.297\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.240\",\n \"lessThan\": \"5.10.241\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.189\",\n \"lessThan\": \"5.15.190\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.146\",\n \"lessThan\": \"6.1.149\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.99\",\n \"lessThan\": \"6.6.103\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.39\",\n \"lessThan\": \"6.12.43\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.15.7\",\n \"lessThan\": \"6.15.11\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/netlink/af_netlink.c\"\n ],\n \"versions\": [\n {\n \"version\": \"6.16\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"6.16\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.297\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.241\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.190\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.149\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.103\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.43\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.15.11\",\n \"lessThanOrEqual\": \"6.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.16.2\",\n \"lessThanOrEqual\": \"6.16.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.17\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/47d49fd07f86d1f55ea1083287303d237e9e0922","https://git.kernel.org/stable/c/6bee383ff83352a693d03efdf27cdd80742f71b2","https://git.kernel.org/stable/c/f324959ad47e62e3cadaffa65d3cff790fb48529","https://git.kernel.org/stable/c/d42b71a34f6b8a2d5c53df81169b03b8d8b5cf4e","https://git.kernel.org/stable/c/346c820ef5135cf062fa3473da955ef8c5fb6929","https://git.kernel.org/stable/c/44ddd7b1ae0b7edb2c832eb16798c827a05e58f0","https://git.kernel.org/stable/c/78fcd69d55c5f11d7694c547eca767a1cfd38ec4","https://git.kernel.org/stable/c/e8edc7de688791a337c068693f22e8d8b869df71","https://git.kernel.org/stable/c/759dfc7d04bab1b0b86113f1164dc1fec192b859"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38727","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-38727","identifiers":["CVE-2025-38727"]},"retained":false,"historicalAffected":[]}],"coverage":[]}