ARM: footbridge: fix PCI interrupt mapping
Priority LOW 24CWE-754Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: ARM: footbridge: fix PCI interrupt mapping Since commit 30fdfb929e82 ("PCI: Add a call to pci_assign_irq() in pci_device_probe()"), the PCI code will call the IRQ mapping function whenever a PCI driver is probed. If these are marked as __init, this causes an oops if a PCI driver is loaded or bound after the kernel has initialised.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00241 15th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 4.14.232, 4.19.189, 5.4.114 +3Red Hat: 2 advisories
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 4.13 and later | 4.14.232, 4.19.189, 5.4.114, 5.10.32, 5.11.16, 5.12 | Patch available | CNA |
- Linux VendorLinux Affected 4.13 and later Fixed in 4.14.232, 4.19.189, 5.4.114, 5.10.32, 5.11.16, 5.12 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.13.0 to before 4.14.232; 4.15.0 to before 4.19.189; 4.20.0 to before 5.4.114; 5.5.0 to before 5.10.32; 5.11.0 to before 5.11.16 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.13.0 to before 4.14.232; 4.15.0 to before 4.19.189; 4.20.0 to before 5.4.114; 5.5.0 to before 5.10.32; 5.11.0 to before 5.11.16 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.14.232, 4.19.189, 5.4.114, 5.10.32, 5.11.16, 5.12
Red Hat 2 advisories
- RHSA-2024:4352 Released 2024-07-08 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-core-4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-debug-4.18.0-553.8.1.rt7.349.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-core-4.18.0-553.8.1.rt7.349.el8_10, kernel-rt-debug-4.18.0-553.8.1.rt7.349.el8_10 +7
- RHSA-2024:4211 Released 2024-07-02 · Red Hat rating Importantkernel security and bug fix update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.8.1.el8_10, kernel-4.18.0-553.8.1.el8_10, kernel-abi-stablelists-4.18.0-553.8.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.8.1.el8_10
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:4211 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:4211 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2024:4352 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2024:4352 |
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux BaseOS (v. 8)
Timeline
- 2026-10-02 Threatist record created from CVE-2021-46909
- 2026-10-03 Alias added: GHSA-7hx3-ggmh-4qrx
References
Patch 6
- https://git.kernel.org/stable/c/532747fd5c7aaa17ee5cf79f3e947c31eb0e35cf
- https://git.kernel.org/stable/c/2643da6aa57920d9159a1a579fb04f89a2b0d29a
- https://git.kernel.org/stable/c/871b569a3e67f570df9f5ba195444dc7c621293b
- https://git.kernel.org/stable/c/1fc087fdb98d556b416c82ed6e3964a30885f47a
- https://git.kernel.org/stable/c/c3efce8cc9807339633ee30e39882f4c8626ee1d
- https://git.kernel.org/stable/c/30e3b4f256b4e366a61658c294f6a21b8626dda7
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2021-46909 · CVE Program
- CVE-2021-46909 · NVD
- FIRST EPSS
- GHSA-7hx3-ggmh-4qrx · GitHub Advisory Database · CC BY 4.0
- CVE-2021-46909 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences