{"id":"DEBIAN-CVE-2023-53831","details":"In the Linux kernel, the following vulnerability has been resolved:  net: read sk-\u003esk_family once in sk_mc_loop()  syzbot is playing with IPV6_ADDRFORM quite a lot these days, and managed to hit the WARN_ON_ONCE(1) in sk_mc_loop()  We have many more similar issues to fix.  WARNING: CPU: 1 PID: 1593 at net/core/sock.c:782 sk_mc_loop+0x165/0x260 Modules linked in: CPU: 1 PID: 1593 Comm: kworker/1:3 Not tainted 6.1.40-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Workqueue: events_power_efficient gc_worker RIP: 0010:sk_mc_loop+0x165/0x260 net/core/sock.c:782 Code: 34 1b fd 49 81 c7 18 05 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 25 36 6d fd 4d 8b 37 eb 13 e8 db 33 1b fd \u003c0f\u003e 0b b3 01 eb 34 e8 d0 33 1b fd 45 31 f6 49 83 c6 38 4c 89 f0 48 RSP: 0018:ffffc90000388530 EFLAGS: 00010246 RAX: ffffffff846d9b55 RBX: 0000000000000011 RCX: ffff88814f884980 RDX: 0000000000000102 RSI: ffffffff87ae5160 RDI: 0000000000000011 RBP: ffffc90000388550 R08: 0000000000000003 R09: ffffffff846d9a65 R10: 0000000000000002 R11: ffff88814f884980 R12: dffffc0000000000 R13: ffff88810dbee000 R14: 0000000000000010 R15: ffff888150084000 FS: 0000000000000000(0000) GS:ffff8881f6b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000180 CR3: 000000014ee5b000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: \u003cIRQ\u003e [\u003cffffffff8507734f\u003e] ip6_finish_output2+0x33f/0x1ae0 net/ipv6/ip6_output.c:83 [\u003cffffffff85062766\u003e] __ip6_finish_output net/ipv6/ip6_output.c:200 [inline] [\u003cffffffff85062766\u003e] ip6_finish_output+0x6c6/0xb10 net/ipv6/ip6_output.c:211 [\u003cffffffff85061f8c\u003e] NF_HOOK_COND include/linux/netfilter.h:298 [inline] [\u003cffffffff85061f8c\u003e] ip6_output+0x2bc/0x3d0 net/ipv6/ip6_output.c:232 [\u003cffffffff852071cf\u003e] dst_output include/net/dst.h:444 [inline] [\u003cffffffff852071cf\u003e] ip6_local_out+0x10f/0x140 net/ipv6/output_core.c:161 [\u003cffffffff83618fb4\u003e] ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:483 [inline] [\u003cffffffff83618fb4\u003e] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:529 [inline] [\u003cffffffff83618fb4\u003e] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:602 [inline] [\u003cffffffff83618fb4\u003e] ipvlan_queue_xmit+0x1174/0x1be0 drivers/net/ipvlan/ipvlan_core.c:677 [\u003cffffffff8361ddd9\u003e] ipvlan_start_xmit+0x49/0x100 drivers/net/ipvlan/ipvlan_main.c:229 [\u003cffffffff84763fc0\u003e] netdev_start_xmit include/linux/netdevice.h:4925 [inline] [\u003cffffffff84763fc0\u003e] xmit_one net/core/dev.c:3644 [inline] [\u003cffffffff84763fc0\u003e] dev_hard_start_xmit+0x320/0x980 net/core/dev.c:3660 [\u003cffffffff8494c650\u003e] sch_direct_xmit+0x2a0/0x9c0 net/sched/sch_generic.c:342 [\u003cffffffff8494d883\u003e] qdisc_restart net/sched/sch_generic.c:407 [inline] [\u003cffffffff8494d883\u003e] __qdisc_run+0xb13/0x1e70 net/sched/sch_generic.c:415 [\u003cffffffff8478c426\u003e] qdisc_run+0xd6/0x260 include/net/pkt_sched.h:125 [\u003cffffffff84796eac\u003e] net_tx_action+0x7ac/0x940 net/core/dev.c:5247 [\u003cffffffff858002bd\u003e] __do_softirq+0x2bd/0x9bd kernel/softirq.c:599 [\u003cffffffff814c3fe8\u003e] invoke_softirq kernel/softirq.c:430 [inline] [\u003cffffffff814c3fe8\u003e] __irq_exit_rcu+0xc8/0x170 kernel/softirq.c:683 [\u003cffffffff814c3f09\u003e] irq_exit_rcu+0x9/0x20 kernel/softirq.c:695","modified":"2026-09-15T08:47:40.095149737Z","published":"2025-12-09T16:17:22.017Z","upstream":["CVE-2023-53831"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53831"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.55-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53831.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53831.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53831.json"}}],"schema_version":"1.9.0"}