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CVE-2024-46750— PCI: Add missing bridge lock to pci_bus_lock()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于缺少必要的锁定机制。

CVSS 7.8 · High EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 090a3c5322e900f468b3205b76d0837003ad57b2< 0790b89c7e911003b8c50ae50e3ac7645de1fae9 affected
090a3c5322e900f468b3205b76d0837003ad57b2< df77a678c33871a6e4ac5b54a71662f1d702335b affected
090a3c5322e900f468b3205b76d0837003ad57b2< e2355d513b89a2cb511b4ded0deb426cdb01acd0 affected
090a3c5322e900f468b3205b76d0837003ad57b2< 04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 affected
090a3c5322e900f468b3205b76d0837003ad57b2< 7253b4fed46471cc247c6cacefac890a8472c083 affected
090a3c5322e900f468b3205b76d0837003ad57b2< 78c6e39fef5c428960aff742149bba302dd46f5a affected
090a3c5322e900f468b3205b76d0837003ad57b2< 81c68e218ab883dfa368460a59b674084c0240da affected
090a3c5322e900f468b3205b76d0837003ad57b2< a4e772898f8bf2e7e1cf661a12c60a5612c4afab affected
… +10 more rows
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I. Basic Information for CVE-2024-46750

Vulnerability Information
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Vulnerability Title
PCI: Add missing bridge lock to pci_bus_lock()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: PCI: Add missing bridge lock to pci_bus_lock() One of the true positives that the cfg_access_lock lockdep effort identified is this sequence: WARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70 RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70 Call Trace: <TASK> ? __warn+0x8c/0x190 ? pci_bridge_secondary_bus_reset+0x5d/0x70 ? report_bug+0x1f8/0x200 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? pci_bridge_secondary_bus_reset+0x5d/0x70 pci_reset_bus+0x1d8/0x270 vmd_probe+0x778/0xa10 pci_device_probe+0x95/0x120 Where pci_reset_bus() users are triggering unlocked secondary bus resets. Ironically pci_bus_reset(), several calls down from pci_reset_bus(), uses pci_bus_lock() before issuing the reset which locks everything *but* the bridge itself. For the same motivation as adding: bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge); to pci_reset_function() for the "bus" and "cxl_bus" reset cases, add pci_dev_lock() for @bus->self to pci_bus_lock(). [bhelgaas: squash in recursive locking deadlock fix from Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于缺少必要的锁定机制。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 090a3c5322e900f468b3205b76d0837003ad57b2 ~ 0790b89c7e911003b8c50ae50e3ac7645de1fae9 -
Linux Linux 3.12 -

II. Public POCs for CVE-2024-46750

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III. Intelligence Information for CVE-2024-46750

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Patches & Fixes for CVE-2024-46750 (4)

Same Patch Batch · Linux · 2024-09-18 · 85 CVEs total

CVE-2024-46717 9.8 CRITICAL net/mlx5e: SHAMPO, Fix incorrect page release
CVE-2024-46736 9.8 CRITICAL smb: client: fix double put of @cfile in smb2_rename_path()
CVE-2024-46796 9.8 CRITICAL smb: client: fix double put of @cfile in smb2_set_path_size()
CVE-2024-46755 8.8 HIGH wifi: mwifiex: Do not return unused priv in mwifiex_get_priv_by_id()
CVE-2024-46780 7.8 HIGH nilfs2: protect references to superblock parameters exposed in sysfs
CVE-2024-46725 7.8 HIGH drm/amdgpu: Fix out-of-bounds write warning
CVE-2024-46792 7.8 HIGH riscv: misaligned: Restrict user access to kernel memory
CVE-2024-46787 7.8 HIGH userfaultfd: fix checks for huge PMDs
CVE-2024-46734 7.8 HIGH btrfs: fix race between direct IO write and fsync when using same fd
CVE-2024-46738 7.8 HIGH VMCI: Fix use-after-free when removing resource in vmci_resource_remove()
CVE-2024-46740 7.8 HIGH binder: fix UAF caused by offsets overwrite
CVE-2024-46746 7.8 HIGH HID: amd_sfh: free driver_data after destroying hid device
CVE-2024-46781 7.8 HIGH nilfs2: fix missing cleanup on rollforward recovery error
CVE-2024-46741 7.8 HIGH misc: fastrpc: Fix double free of 'buf' in error path
CVE-2024-46751 7.8 HIGH btrfs: don't BUG_ON() when 0 reference count at btrfs_lookup_extent_info()
CVE-2024-46777 7.8 HIGH udf: Avoid excessive partition lengths
CVE-2024-46754 7.8 HIGH bpf: Remove tst_run from lwt_seg6local_prog_ops.
CVE-2024-46762 7.8 HIGH xen: privcmd: Fix possible access to a freed kirqfd instance
CVE-2024-46765 7.8 HIGH ice: protect XDP configuration with a mutex
CVE-2024-46771 7.8 HIGH can: bcm: Remove proc entry when dev is unregistered.

Showing top 20 of 85 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-46750

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