{"id":"DEBIAN-CVE-2024-50261","details":"In the Linux kernel, the following vulnerability has been resolved:  macsec: Fix use-after-free while sending the offloading packet  KASAN reports the following UAF. The metadata_dst, which is used to store the SCI value for macsec offload, is already freed by metadata_dst_free() in macsec_free_netdev(), while driver still use it for sending the packet.  To fix this issue, dst_release() is used instead to release metadata_dst. So it is not freed instantly in macsec_free_netdev() if still referenced by skb.   BUG: KASAN: slab-use-after-free in mlx5e_xmit+0x1e8f/0x4190 [mlx5_core]  Read of size 2 at addr ffff88813e42e038 by task kworker/7:2/714  [...]  Workqueue: mld mld_ifc_work  Call Trace:   \u003cTASK\u003e   dump_stack_lvl+0x51/0x60   print_report+0xc1/0x600   kasan_report+0xab/0xe0   mlx5e_xmit+0x1e8f/0x4190 [mlx5_core]   dev_hard_start_xmit+0x120/0x530   sch_direct_xmit+0x149/0x11e0   __qdisc_run+0x3ad/0x1730   __dev_queue_xmit+0x1196/0x2ed0   vlan_dev_hard_start_xmit+0x32e/0x510 [8021q]   dev_hard_start_xmit+0x120/0x530   __dev_queue_xmit+0x14a7/0x2ed0   macsec_start_xmit+0x13e9/0x2340   dev_hard_start_xmit+0x120/0x530   __dev_queue_xmit+0x14a7/0x2ed0   ip6_finish_output2+0x923/0x1a70   ip6_finish_output+0x2d7/0x970   ip6_output+0x1ce/0x3a0   NF_HOOK.constprop.0+0x15f/0x190   mld_sendpack+0x59a/0xbd0   mld_ifc_work+0x48a/0xa80   process_one_work+0x5aa/0xe50   worker_thread+0x79c/0x1290   kthread+0x28f/0x350   ret_from_fork+0x2d/0x70   ret_from_fork_asm+0x11/0x20   \u003c/TASK\u003e   Allocated by task 3922:   kasan_save_stack+0x20/0x40   kasan_save_track+0x10/0x30   __kasan_kmalloc+0x77/0x90   __kmalloc_noprof+0x188/0x400   metadata_dst_alloc+0x1f/0x4e0   macsec_newlink+0x914/0x1410   __rtnl_newlink+0xe08/0x15b0   rtnl_newlink+0x5f/0x90   rtnetlink_rcv_msg+0x667/0xa80   netlink_rcv_skb+0x12c/0x360   netlink_unicast+0x551/0x770   netlink_sendmsg+0x72d/0xbd0   __sock_sendmsg+0xc5/0x190   ____sys_sendmsg+0x52e/0x6a0   ___sys_sendmsg+0xeb/0x170   __sys_sendmsg+0xb5/0x140   do_syscall_64+0x4c/0x100   entry_SYSCALL_64_after_hwframe+0x4b/0x53   Freed by task 4011:   kasan_save_stack+0x20/0x40   kasan_save_track+0x10/0x30   kasan_save_free_info+0x37/0x50   poison_slab_object+0x10c/0x190   __kasan_slab_free+0x11/0x30   kfree+0xe0/0x290   macsec_free_netdev+0x3f/0x140   netdev_run_todo+0x450/0xc70   rtnetlink_rcv_msg+0x66f/0xa80   netlink_rcv_skb+0x12c/0x360   netlink_unicast+0x551/0x770   netlink_sendmsg+0x72d/0xbd0   __sock_sendmsg+0xc5/0x190   ____sys_sendmsg+0x52e/0x6a0   ___sys_sendmsg+0xeb/0x170   __sys_sendmsg+0xb5/0x140   do_syscall_64+0x4c/0x100   entry_SYSCALL_64_after_hwframe+0x4b/0x53","modified":"2026-09-15T09:03:15.557335425Z","published":"2024-11-09T11:15:11.610Z","upstream":["CVE-2024-50261"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-50261"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.119-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","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","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50261.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50261.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.11.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-50261.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}