PCI: Add missing bridge lock to pci_bus_lock()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-46750
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-09-18 08:15:03 UTC
Updated2026-05-12 12:17:11 UTC
DescriptionIn 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/[email protected]]

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-667

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 090a3c5322e900f468b3205b76d0837003ad57b2 0790b89c7e911003b8c50ae50e3ac7645de1fae9 git Not specified
CNA Linux Linux affected 090a3c5322e900f468b3205b76d0837003ad57b2 df77a678c33871a6e4ac5b54a71662f1d702335b git Not specified
CNA Linux Linux affected 090a3c5322e900f468b3205b76d0837003ad57b2 e2355d513b89a2cb511b4ded0deb426cdb01acd0 git Not specified
CNA Linux Linux affected 090a3c5322e900f468b3205b76d0837003ad57b2 04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 git Not specified
CNA Linux Linux affected 090a3c5322e900f468b3205b76d0837003ad57b2 7253b4fed46471cc247c6cacefac890a8472c083 git Not specified
CNA Linux Linux affected 090a3c5322e900f468b3205b76d0837003ad57b2 78c6e39fef5c428960aff742149bba302dd46f5a git Not specified
CNA Linux Linux affected 090a3c5322e900f468b3205b76d0837003ad57b2 81c68e218ab883dfa368460a59b674084c0240da git Not specified
CNA Linux Linux affected 090a3c5322e900f468b3205b76d0837003ad57b2 a4e772898f8bf2e7e1cf661a12c60a5612c4afab git Not specified
CNA Linux Linux affected 3.12 Not specified
CNA Linux Linux unaffected 3.12 semver Not specified
CNA Linux Linux unaffected 4.19.322 4.19.* semver Not specified
CNA Linux Linux unaffected 5.4.284 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.226 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.167 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.110 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.51 6.6.* semver Not specified
CNA Linux Linux unaffected 6.10.10 6.10.* semver Not specified
CNA Linux Linux unaffected 6.11 * original_commit_for_fix Not specified
ADP Siemens RUGGEDCOM RST2428P affected V3.2 custom Not specified
ADP Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 Family affected V3.2 custom Not specified
ADP Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 Family affected V3.2 custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2024/10/msg00003.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
cert-portal.siemens.com/productcert/html/ssa-355557.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
lists.debian.org/debian-lts-announce/2025/01/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
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