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CVE-2024-50126— net: sched: use RCU read-side critical section in taprio_dump()

EPSS 0.02% · P6
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I. Basic Information for CVE-2024-50126

Vulnerability Information
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Vulnerability Title
net: sched: use RCU read-side critical section in taprio_dump()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In 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] ____sys_sendmsg+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] ____sys_sendmsg+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
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于net模块中，taprio_dump函数中可能的悬空指针使用，通过添加RCU读取侧临界区来修复，该问题在arm64系统上被发现。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 18cdd2f0998a4967b1fff4c43ed9aef049e42c39 ~ b911fa9e92ee586e36479ad57b88f20471acaca1 -
LinuxLinux 6.1 -

II. Public POCs for CVE-2024-50126

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III. Intelligence Information for CVE-2024-50126

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Same Patch Batch · Linux · 2024-11-05 · 50 CVEs total

CVE-2024-50124Bluetooth: ISO: Fix UAF on iso_sock_timeout
CVE-2024-50129net: pse-pd: Fix out of bound for loop
CVE-2024-50134drm/vboxvideo: Replace fake VLA at end of vbva_mouse_pointer_shape with real VLA
CVE-2024-50136net/mlx5: Unregister notifier on eswitch init failure
CVE-2024-50135nvme-pci: fix race condition between reset and nvme_dev_disable()
CVE-2024-50137reset: starfive: jh71x0: Fix accessing the empty member on JH7110 SoC
CVE-2024-50138bpf: Use raw_spinlock_t in ringbuf
CVE-2024-50132tracing/probes: Fix MAX_TRACE_ARGS limit handling
CVE-2024-50125Bluetooth: SCO: Fix UAF on sco_sock_timeout
CVE-2024-50123bpf: Add the missing BPF_LINK_TYPE invocation for sockmap
CVE-2024-50127net: sched: fix use-after-free in taprio_change()
CVE-2024-50121nfsd: cancel nfsd_shrinker_work using sync mode in nfs4_state_shutdown_net
CVE-2024-50122PCI: Hold rescan lock while adding devices during host probe
CVE-2024-50120smb: client: Handle kstrdup failures for passwords
CVE-2024-50119cifs: fix warning when destroy 'cifs_io_request_pool'
CVE-2024-50118btrfs: reject ro->rw reconfiguration if there are hard ro requirements
CVE-2024-50117drm/amd: Guard against bad data for ATIF ACPI method
CVE-2024-50116nilfs2: fix kernel bug due to missing clearing of buffer delay flag
CVE-2024-50115KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory
CVE-2024-50114KVM: arm64: Unregister redistributor for failed vCPU creation

Showing top 20 of 50 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-50126

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