GHSA-QH6F-G265-FMXF
Vulnerability from github – Published: 2024-11-05 18:32 – Updated: 2025-11-04 00:31In the Linux kernel, the following vulnerability has been resolved:
net: sched: use RCU read-side critical section in taprio_dump()
Fix possible use-after-free in 'taprio_dump()' by adding RCU read-side critical section there. Never seen on x86 but found on a KASAN-enabled arm64 system when investigating https://syzkaller.appspot.com/bug?extid=b65e0af58423fc8a73aa:
[T15862] BUG: KASAN: slab-use-after-free in taprio_dump+0xa0c/0xbb0 [T15862] Read of size 4 at addr ffff0000d4bb88f8 by task repro/15862 [T15862] [T15862] CPU: 0 UID: 0 PID: 15862 Comm: repro Not tainted 6.11.0-rc1-00293-gdefaf1a2113a-dirty #2 [T15862] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-20240524-5.fc40 05/24/2024 [T15862] Call trace: [T15862] dump_backtrace+0x20c/0x220 [T15862] show_stack+0x2c/0x40 [T15862] dump_stack_lvl+0xf8/0x174 [T15862] print_report+0x170/0x4d8 [T15862] kasan_report+0xb8/0x1d4 [T15862] __asan_report_load4_noabort+0x20/0x2c [T15862] taprio_dump+0xa0c/0xbb0 [T15862] tc_fill_qdisc+0x540/0x1020 [T15862] qdisc_notify.isra.0+0x330/0x3a0 [T15862] tc_modify_qdisc+0x7b8/0x1838 [T15862] rtnetlink_rcv_msg+0x3c8/0xc20 [T15862] netlink_rcv_skb+0x1f8/0x3d4 [T15862] rtnetlink_rcv+0x28/0x40 [T15862] netlink_unicast+0x51c/0x790 [T15862] netlink_sendmsg+0x79c/0xc20 [T15862] __sock_sendmsg+0xe0/0x1a0 [T15862] _syssendmsg+0x6c0/0x840 [T15862] _sys_sendmsg+0x1ac/0x1f0 [T15862] __sys_sendmsg+0x110/0x1d0 [T15862] __arm64_sys_sendmsg+0x74/0xb0 [T15862] invoke_syscall+0x88/0x2e0 [T15862] el0_svc_common.constprop.0+0xe4/0x2a0 [T15862] do_el0_svc+0x44/0x60 [T15862] el0_svc+0x50/0x184 [T15862] el0t_64_sync_handler+0x120/0x12c [T15862] el0t_64_sync+0x190/0x194 [T15862] [T15862] Allocated by task 15857: [T15862] kasan_save_stack+0x3c/0x70 [T15862] kasan_save_track+0x20/0x3c [T15862] kasan_save_alloc_info+0x40/0x60 [T15862] __kasan_kmalloc+0xd4/0xe0 [T15862] __kmalloc_cache_noprof+0x194/0x334 [T15862] taprio_change+0x45c/0x2fe0 [T15862] tc_modify_qdisc+0x6a8/0x1838 [T15862] rtnetlink_rcv_msg+0x3c8/0xc20 [T15862] netlink_rcv_skb+0x1f8/0x3d4 [T15862] rtnetlink_rcv+0x28/0x40 [T15862] netlink_unicast+0x51c/0x790 [T15862] netlink_sendmsg+0x79c/0xc20 [T15862] __sock_sendmsg+0xe0/0x1a0 [T15862] _syssendmsg+0x6c0/0x840 [T15862] _sys_sendmsg+0x1ac/0x1f0 [T15862] __sys_sendmsg+0x110/0x1d0 [T15862] __arm64_sys_sendmsg+0x74/0xb0 [T15862] invoke_syscall+0x88/0x2e0 [T15862] el0_svc_common.constprop.0+0xe4/0x2a0 [T15862] do_el0_svc+0x44/0x60 [T15862] el0_svc+0x50/0x184 [T15862] el0t_64_sync_handler+0x120/0x12c [T15862] el0t_64_sync+0x190/0x194 [T15862] [T15862] Freed by task 6192: [T15862] kasan_save_stack+0x3c/0x70 [T15862] kasan_save_track+0x20/0x3c [T15862] kasan_save_free_info+0x4c/0x80 [T15862] poison_slab_object+0x110/0x160 [T15862] __kasan_slab_free+0x3c/0x74 [T15862] kfree+0x134/0x3c0 [T15862] taprio_free_sched_cb+0x18c/0x220 [T15862] rcu_core+0x920/0x1b7c [T15862] rcu_core_si+0x10/0x1c [T15862] handle_softirqs+0x2e8/0xd64 [T15862] __do_softirq+0x14/0x20
{
"affected": [],
"aliases": [
"CVE-2024-50126"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-05T18:15:15Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: use RCU read-side critical section in taprio_dump()\n\nFix possible use-after-free in \u0027taprio_dump()\u0027 by adding RCU\nread-side critical section there. Never seen on x86 but\nfound on a KASAN-enabled arm64 system when investigating\nhttps://syzkaller.appspot.com/bug?extid=b65e0af58423fc8a73aa:\n\n[T15862] BUG: KASAN: slab-use-after-free in taprio_dump+0xa0c/0xbb0\n[T15862] Read of size 4 at addr ffff0000d4bb88f8 by task repro/15862\n[T15862]\n[T15862] CPU: 0 UID: 0 PID: 15862 Comm: repro Not tainted 6.11.0-rc1-00293-gdefaf1a2113a-dirty #2\n[T15862] Hardware name: QEMU QEMU Virtual Machine, BIOS edk2-20240524-5.fc40 05/24/2024\n[T15862] Call trace:\n[T15862] dump_backtrace+0x20c/0x220\n[T15862] show_stack+0x2c/0x40\n[T15862] dump_stack_lvl+0xf8/0x174\n[T15862] print_report+0x170/0x4d8\n[T15862] kasan_report+0xb8/0x1d4\n[T15862] __asan_report_load4_noabort+0x20/0x2c\n[T15862] taprio_dump+0xa0c/0xbb0\n[T15862] tc_fill_qdisc+0x540/0x1020\n[T15862] qdisc_notify.isra.0+0x330/0x3a0\n[T15862] tc_modify_qdisc+0x7b8/0x1838\n[T15862] rtnetlink_rcv_msg+0x3c8/0xc20\n[T15862] netlink_rcv_skb+0x1f8/0x3d4\n[T15862] rtnetlink_rcv+0x28/0x40\n[T15862] netlink_unicast+0x51c/0x790\n[T15862] netlink_sendmsg+0x79c/0xc20\n[T15862] __sock_sendmsg+0xe0/0x1a0\n[T15862] ____sys_sendmsg+0x6c0/0x840\n[T15862] ___sys_sendmsg+0x1ac/0x1f0\n[T15862] __sys_sendmsg+0x110/0x1d0\n[T15862] __arm64_sys_sendmsg+0x74/0xb0\n[T15862] invoke_syscall+0x88/0x2e0\n[T15862] el0_svc_common.constprop.0+0xe4/0x2a0\n[T15862] do_el0_svc+0x44/0x60\n[T15862] el0_svc+0x50/0x184\n[T15862] el0t_64_sync_handler+0x120/0x12c\n[T15862] el0t_64_sync+0x190/0x194\n[T15862]\n[T15862] Allocated by task 15857:\n[T15862] kasan_save_stack+0x3c/0x70\n[T15862] kasan_save_track+0x20/0x3c\n[T15862] kasan_save_alloc_info+0x40/0x60\n[T15862] __kasan_kmalloc+0xd4/0xe0\n[T15862] __kmalloc_cache_noprof+0x194/0x334\n[T15862] taprio_change+0x45c/0x2fe0\n[T15862] tc_modify_qdisc+0x6a8/0x1838\n[T15862] rtnetlink_rcv_msg+0x3c8/0xc20\n[T15862] netlink_rcv_skb+0x1f8/0x3d4\n[T15862] rtnetlink_rcv+0x28/0x40\n[T15862] netlink_unicast+0x51c/0x790\n[T15862] netlink_sendmsg+0x79c/0xc20\n[T15862] __sock_sendmsg+0xe0/0x1a0\n[T15862] ____sys_sendmsg+0x6c0/0x840\n[T15862] ___sys_sendmsg+0x1ac/0x1f0\n[T15862] __sys_sendmsg+0x110/0x1d0\n[T15862] __arm64_sys_sendmsg+0x74/0xb0\n[T15862] invoke_syscall+0x88/0x2e0\n[T15862] el0_svc_common.constprop.0+0xe4/0x2a0\n[T15862] do_el0_svc+0x44/0x60\n[T15862] el0_svc+0x50/0x184\n[T15862] el0t_64_sync_handler+0x120/0x12c\n[T15862] el0t_64_sync+0x190/0x194\n[T15862]\n[T15862] Freed by task 6192:\n[T15862] kasan_save_stack+0x3c/0x70\n[T15862] kasan_save_track+0x20/0x3c\n[T15862] kasan_save_free_info+0x4c/0x80\n[T15862] poison_slab_object+0x110/0x160\n[T15862] __kasan_slab_free+0x3c/0x74\n[T15862] kfree+0x134/0x3c0\n[T15862] taprio_free_sched_cb+0x18c/0x220\n[T15862] rcu_core+0x920/0x1b7c\n[T15862] rcu_core_si+0x10/0x1c\n[T15862] handle_softirqs+0x2e8/0xd64\n[T15862] __do_softirq+0x14/0x20",
"id": "GHSA-qh6f-g265-fmxf",
"modified": "2025-11-04T00:31:55Z",
"published": "2024-11-05T18:32:12Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50126"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5d282467245f267c0b9ada3f7f309ff838521536"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b22db8b8befe90b61c98626ca1a2fbb0505e9fe3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b911fa9e92ee586e36479ad57b88f20471acaca1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e4369cb6acf6b895ac2453cc1cdf2f4326122c6d"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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