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TI-2026-61356 Aliases CVE-2026-90315GHSA-7fpw-g7p7-53qh

PCI/sysfs: Add lockdown checks to legacy I/O and memory handlers

Priority LOW 22Published · Updated

Key facts

Attack vector
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Privileges required
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User interaction
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Attack complexity
—
Impact type
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Confidentiality · integrity · availability
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Fix status
Partial Red Hat: 7 fixed, 4 without a fix

No CVSS vector from any source. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: PCI/sysfs: Add lockdown checks to legacy I/O and memory handlers Currently, the legacy I/O and memory sysfs handlers do not check security_locked_down(LOCKDOWN_PCI_ACCESS), leaving the legacy_io and legacy_mem files unprotected when the kernel is locked down. Commit eb627e17727e ("PCI: Lock down BAR access when the kernel is locked down") added the check to pci_write_config(), pci_mmap_resource(), and pci_write_resource_io() to prevent userspace from programming DMA-capable hardware that could be used to modify kernel code, but did not cover the legacy handlers. As a result, root can still write arbitrary I/O ports and map the legacy I/O and memory spaces while the kernel is locked down, which is the same capability the lockdown is meant to remove. Add the same check to pci_write_legacy_io(), pci_mmap_legacy_mem(), and pci_mmap_legacy_io(). These generic handlers cover both architectures that define HAVE_PCI_LEGACY (such as Alpha and PowerPC). [bhelgaas: add Link]

Why it matters now

EPSS 0.00198 9th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.18.57, 7.2.6, 7.3Red Hat: 1 advisoryRed Hat: 7 fixed, 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.4 and later6.18.57, 7.2.6, 7.3Patch availableCNA
  • Linux VendorLinux Affected 5.4 and later Fixed in 6.18.57, 7.2.6, 7.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*——Linux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.18.57, 7.2.6, 7.3

Red Hat 1 advisory

  • RHSA-2026:95367 Released 2026-11-05 · Red Hat rating Important
    kernel security update
    • 10Base-SMTV kernel-modules-internal-6.12.0-211.74.1.el10_2
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.74.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.74.1.el10_2, kernel-64k-devel-6.12.0-211.74.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.74.1.el10_2, kernel-64k-6.12.0-211.74.1.el10_2, kernel-64k-core-6.12.0-211.74.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.74.1.el10_2, libperf-6.12.0-211.74.1.el10_2
    • Red Hat Enterprise Linux Hidden (v. 10) kernel-modules-internal-6.12.0-211.74.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.74.1.el10_2, kernel-rt-64k-6.12.0-211.74.1.el10_2, kernel-rt-64k-core-6.12.0-211.74.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.74.1.el10_2, kernel-rt-core-6.12.0-211.74.1.el10_2, kernel-rt-debug-6.12.0-211.74.1.el10_2 +9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6Affected—
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat OpenShift Container Platform 5AffectedNo fix yet
10Base-SMTVFixed RHSA-2026:95367
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:95367
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:95367
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:95367
Red Hat Enterprise Linux Hidden (v. 10)Fixed RHSA-2026:95367
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:95367
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:95367
Not affected: 3 products
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-90315
  2. 2026-10-03 Alias added: GHSA-7fpw-g7p7-53qh
  3. 2026-10-07 Affected versions changed · Red Hat
  4. 2026-10-07 CVSS score added · Red Hat
  5. 2026-10-16 Fix available: Linux/Linux@3556caa31a2bfbc22c11b812fd4ed8851c2d7bff, Linux/[email protected] · CNA
  6. 2026-10-16 1 new reference · CNA
  7. 2026-10-19 Fix available: Linux/[email protected] · CNA
  8. 2026-10-30 Affected versions changed · Red Hat
  9. 2026-11-05 Fix available: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) +4 · Red Hat
  10. 2026-11-06 Fix available: RHSA-2026:95367 · Red Hat

References

Other 3

  • 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-2021-02452 Incorrect authorization in Ubuntu linux kernel 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
See all 21727 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences