CVE-2024-46750

MEDIUM EPSS 11.8%
Published Sep 18, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 18, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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]

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
11.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel* <4.19.322
linuxlinux_kernel*≥4.20  –  <5.4.284
linuxlinux_kernel*≥5.5  –  <5.10.226
linuxlinux_kernel*≥5.11  –  <5.15.167
linuxlinux_kernel*≥5.16  –  <6.1.110
linuxlinux_kernel*≥6.2  –  <6.6.51
linuxlinux_kernel*≥6.7  –  <6.10.10

References 13

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-355557.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-398330.html
  • git.kernel.org https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0
    Patch