{"id":"DEBIAN-CVE-2024-26961","details":"In the Linux kernel, the following vulnerability has been resolved:  mac802154: fix llsec key resources release in mac802154_llsec_key_del  mac802154_llsec_key_del() can free resources of a key directly without following the RCU rules for waiting before the end of a grace period. This may lead to use-after-free in case llsec_lookup_key() is traversing the list of keys in parallel with a key deletion:  refcount_t: addition on 0; use-after-free. WARNING: CPU: 4 PID: 16000 at lib/refcount.c:25 refcount_warn_saturate+0x162/0x2a0 Modules linked in: CPU: 4 PID: 16000 Comm: wpan-ping Not tainted 6.7.0 #19 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:refcount_warn_saturate+0x162/0x2a0 Call Trace:  \u003cTASK\u003e  llsec_lookup_key.isra.0+0x890/0x9e0  mac802154_llsec_encrypt+0x30c/0x9c0  ieee802154_subif_start_xmit+0x24/0x1e0  dev_hard_start_xmit+0x13e/0x690  sch_direct_xmit+0x2ae/0xbc0  __dev_queue_xmit+0x11dd/0x3c20  dgram_sendmsg+0x90b/0xd60  __sys_sendto+0x466/0x4c0  __x64_sys_sendto+0xe0/0x1c0  do_syscall_64+0x45/0xf0  entry_SYSCALL_64_after_hwframe+0x6e/0x76  Also, ieee802154_llsec_key_entry structures are not freed by mac802154_llsec_key_del():  unreferenced object 0xffff8880613b6980 (size 64):   comm \"iwpan\", pid 2176, jiffies 4294761134 (age 60.475s)   hex dump (first 32 bytes):     78 0d 8f 18 80 88 ff ff 22 01 00 00 00 00 ad de  x.......\".......     00 00 00 00 00 00 00 00 03 00 cd ab 00 00 00 00  ................   backtrace:     [\u003cffffffff81dcfa62\u003e] __kmem_cache_alloc_node+0x1e2/0x2d0     [\u003cffffffff81c43865\u003e] kmalloc_trace+0x25/0xc0     [\u003cffffffff88968b09\u003e] mac802154_llsec_key_add+0xac9/0xcf0     [\u003cffffffff8896e41a\u003e] ieee802154_add_llsec_key+0x5a/0x80     [\u003cffffffff8892adc6\u003e] nl802154_add_llsec_key+0x426/0x5b0     [\u003cffffffff86ff293e\u003e] genl_family_rcv_msg_doit+0x1fe/0x2f0     [\u003cffffffff86ff46d1\u003e] genl_rcv_msg+0x531/0x7d0     [\u003cffffffff86fee7a9\u003e] netlink_rcv_skb+0x169/0x440     [\u003cffffffff86ff1d88\u003e] genl_rcv+0x28/0x40     [\u003cffffffff86fec15c\u003e] netlink_unicast+0x53c/0x820     [\u003cffffffff86fecd8b\u003e] netlink_sendmsg+0x93b/0xe60     [\u003cffffffff86b91b35\u003e] ____sys_sendmsg+0xac5/0xca0     [\u003cffffffff86b9c3dd\u003e] ___sys_sendmsg+0x11d/0x1c0     [\u003cffffffff86b9c65a\u003e] __sys_sendmsg+0xfa/0x1d0     [\u003cffffffff88eadbf5\u003e] do_syscall_64+0x45/0xf0     [\u003cffffffff890000ea\u003e] entry_SYSCALL_64_after_hwframe+0x6e/0x76  Handle the proper resource release in the RCU callback function mac802154_llsec_key_del_rcu().  Note that if llsec_lookup_key() finds a key, it gets a refcount via llsec_key_get() and locally copies key id from key_entry (which is a list element). So it's safe to call llsec_key_put() and free the list entry after the RCU grace period elapses.  Found by Linux Verification Center (linuxtesting.org).","modified":"2026-10-01T11:01:11.244475627Z","published":"2024-05-01T06:15:12.437Z","upstream":["CVE-2024-26961"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-26961"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.85-1"}]}],"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","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"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26961.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26961.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.12-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26961.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"}]}