7.8

CVE-2024-46750: linux Improper Locking

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2024-46750DEBIAN-CVE-2024-46750
Published 18-09-2024Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2024-46750 is a high (CVSS 7.8) Improper Locking vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.2% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 34 · Related 28
DLA-3912-1DLA-4008-1DSA-5782-1MGASA-2024-0316MGASA-2024-0318RHSA-2025:6966

Timeline

  1. 18-09-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu130 products
  • linuxAll versions (No fix recorded) | < 5.4.0-200.220 | < 5.15.0-125.135 | < 6.8.0-50.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1135.145 | < 5.15.0-1072.78 | < 6.8.0-1020.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 090a3c5322e900f468b3205b76d0837003ad57b2, < 0790b89c7e911003b8c50ae50e3ac7645de1fae9 | ≥ 090a3c5322e900f468b3205b76d0837003ad57b2, < df77a678c33871a6e4ac5b54a71662f1d702335b | ≥ 090a3c5322e900f468b3205b76d0837003ad57b2, < e2355d513b89a2cb511b4ded0deb426cdb01acd0 | ≥ 090a3c5322e900f468b3205b76d0837003ad57b2, < 04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 | ≥ 090a3c5322e900f468b3205b76d0837003ad57b2, < 7253b4fed46471cc247c6cacefac890a8472c083 | ≥ 090a3c5322e900f468b3205b76d0837003ad57b2, < 78c6e39fef5c428960aff742149bba302dd46f5a | ≥ 090a3c5322e900f468b3205b76d0837003ad57b2, < 81c68e218ab883dfa368460a59b674084c0240da | ≥ 090a3c5322e900f468b3205b76d0837003ad57b2, < a4e772898f8bf2e7e1cf661a12c60a5612c4afab | 3.12
  • linux_kernel< 4.19.322 | ≥ 4.20, < 5.4.284 | ≥ 5.5, < 5.10.226 | ≥ 5.11, < 5.15.167 | ≥ 5.16, < 6.1.110 | ≥ 6.2, < 6.6.51 | ≥ 6.7, < 6.10.10
Debian1 product
  • linux< 6.1.112-1 | < 6.10.11-1

3 vendors · 133 products

References

34 links
Show all 34 references