CVE-2026-64461: PCI: mediatek: Fix IRQ domain leak when port fails to enable

Received
AliasesUBUNTU-CVE-2026-64461DEBIAN-CVE-2026-64461
Published 25-07-2026Last modified 17-08-2026

Vulnerability summary

CVE-2026-64461 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 8% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.18%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 29 · Related 29
OPENSUSE-SU-2026:11476-1OPENSUSE-SU-2026:22167-1SUSE-SU-2026:24371-1SUSE-SU-2026:24379-1SUSE-SU-2026:24386-1SUSE-SU-2026:24422-1

Timeline

  1. 25-07-2026
    PublishedVulnerability first disclosed.
  2. 17-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: PCI: mediatek: Fix IRQ domain leak when port fails to enable When mtk_pcie_enable_port() fails, mtk_pcie_port_free() removes the port from pcie->ports and frees the port structure. However, the IRQ domains set up earlier by mtk_pcie_init_irq_domain() are never freed. Fix this by refactoring mtk_pcie_irq_teardown() into a per-port helper, mtk_pcie_irq_teardown_port(), and calling it from mtk_pcie_setup() when mtk_pcie_enable_port() fails. Since the IRQ teardown must only happen in the probe error path (during resume, child devices may have active MSI mappings and the NOIRQ context prohibits sleeping locks), mtk_pcie_enable_port() is changed to return an error code so callers can distinguish the two paths and act accordingly. This issue was reported by Sashiko while reviewing the EcoNet EN7528 SoC support series.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

Decrease -0.04 pp

From 0.22% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu168 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.4-1
  • linux-6.12< 6.12.100-1~deb12u1
Linux1 product
  • linux≥ b099631df160ec608cd6147f4d20a8042567a5b8, < e23da72ef202654a7d5269885c4fa39a8404db76 | ≥ b099631df160ec608cd6147f4d20a8042567a5b8, < ec7c05eed47d8b15c45380aee7ca168a82e15035 | ≥ b099631df160ec608cd6147f4d20a8042567a5b8, < 1fbe8972a39548a633d06d7b03a01b7b119a2c12 | ≥ b099631df160ec608cd6147f4d20a8042567a5b8, < fe8c701a53c2816cd82301f66c671d952003c1b0 | ≥ b099631df160ec608cd6147f4d20a8042567a5b8, < ce52e494a7555bdae1d990a2654fd7547ef6d986 | ≥ b099631df160ec608cd6147f4d20a8042567a5b8, < 6e6a529d6f779413379b4404c9ef6a36c0337225 | ≥ b099631df160ec608cd6147f4d20a8042567a5b8, < df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e | ≥ b099631df160ec608cd6147f4d20a8042567a5b8, < f865a57896bd92d7662eb2818d8f48872e2cbbc7 | 4.14

3 vendors · 171 products

References

31 links
Show all 31 references