CVE-2024-49980— vrf: revert "vrf: Remove unnecessary RCU-bh critical section"
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I. Basic Information for CVE-2024-49980
Vulnerability Information
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Vulnerability Title
vrf: revert "vrf: Remove unnecessary RCU-bh critical section"
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vrf: revert "vrf: Remove unnecessary RCU-bh critical section" This reverts commit 504fc6f4f7f681d2a03aa5f68aad549d90eab853. dev_queue_xmit_nit is expected to be called with BH disabled. __dev_queue_xmit has the following: /* Disable soft irqs for various locks below. Also * stops preemption for RCU. */ rcu_read_lock_bh(); VRF must follow this invariant. The referenced commit removed this protection. Which triggered a lockdep warning: ================================ WARNING: inconsistent lock state 6.11.0 #1 Tainted: G W -------------------------------- inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. btserver/134819 [HC0[0]:SC0[0]:HE1:SE1] takes: ffff8882da30c118 (rlock-AF_PACKET){+.?.}-{2:2}, at: tpacket_rcv+0x863/0x3b30 {IN-SOFTIRQ-W} state was registered at: lock_acquire+0x19a/0x4f0 _raw_spin_lock+0x27/0x40 packet_rcv+0xa33/0x1320 __netif_receive_skb_core.constprop.0+0xcb0/0x3a90 __netif_receive_skb_list_core+0x2c9/0x890 netif_receive_skb_list_internal+0x610/0xcc0 [...] other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(rlock-AF_PACKET); <Interrupt> lock(rlock-AF_PACKET); *** DEADLOCK *** Call Trace: <TASK> dump_stack_lvl+0x73/0xa0 mark_lock+0x102e/0x16b0 __lock_acquire+0x9ae/0x6170 lock_acquire+0x19a/0x4f0 _raw_spin_lock+0x27/0x40 tpacket_rcv+0x863/0x3b30 dev_queue_xmit_nit+0x709/0xa40 vrf_finish_direct+0x26e/0x340 [vrf] vrf_l3_out+0x5f4/0xe80 [vrf] __ip_local_out+0x51e/0x7a0 [...]
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vrf子系统中对dev_queue_xmit_nit调用的不当保护，违反了RCU的锁使用约定。
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
II. Public POCs for CVE-2024-49980
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Same Patch Batch · Linux · 2024-10-21 · 372 CVEs total
| CVE-2024-50019 | kthread: unpark only parked kthread | |
| CVE-2024-50030 | drm/xe/ct: prevent UAF in send_recv() | |
| CVE-2024-50028 | thermal: core: Reference count the zone in thermal_zone_get_by_id() | |
| CVE-2024-50029 | Bluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync | |
| CVE-2024-50027 | thermal: core: Free tzp copy along with the thermal zone | |
| CVE-2024-50025 | scsi: fnic: Move flush_work initialization out of if block | |
| CVE-2024-50026 | scsi: wd33c93: Don't use stale scsi_pointer value | |
| CVE-2024-50023 | net: phy: Remove LED entry from LEDs list on unregister | |
| CVE-2024-50024 | net: Fix an unsafe loop on the list | |
| CVE-2024-50022 | device-dax: correct pgoff align in dax_set_mapping() | |
| CVE-2024-50021 | ice: Fix improper handling of refcount in ice_dpll_init_rclk_pins() | |
| CVE-2024-50020 | ice: Fix improper handling of refcount in ice_sriov_set_msix_vec_count() | |
| CVE-2024-50011 | ASoC: Intel: soc-acpi-intel-rpl-match: add missing empty item | |
| CVE-2024-50006 | ext4: fix i_data_sem unlock order in ext4_ind_migrate() | |
| CVE-2024-50007 | ALSA: asihpi: Fix potential OOB array access | |
| CVE-2024-50008 | wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_cmd_802_11_scan_ext() | |
| CVE-2024-50009 | cpufreq: amd-pstate: add check for cpufreq_cpu_get's return value | |
| CVE-2024-50010 | exec: don't WARN for racy path_noexec check | |
| CVE-2024-50014 | ext4: fix access to uninitialised lock in fc replay path | |
| CVE-2024-50017 | x86/mm/ident_map: Use gbpages only where full GB page should be mapped. |
Showing top 20 of 372 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2024-49980
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