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TI-2026-52515 Aliases CVE-2026-74733GHSA-p6rq-qpqh-5f25

gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock

Priority LOW 35Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do this, and it was therefore possible that multiple threads could cause an incorrect register to be read/written. A previous patch partly fixed this, but only protected the write to the interrupt mask register, and not the read from the direction register.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00132 2nd percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.191, 6.6.160, 6.10 +4Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux6.1.101 to before 6.1.191; 6.6.42 to before 6.6.160; 6.9.11 to before 6.106.1.191, 6.6.160, 6.10Patch availableCNA
LinuxLinux6.10 and later6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.1.9, 7.2Patch availableCNA
  • Linux VendorLinux Affected 6.1.101 to before 6.1.191; 6.6.42 to before 6.6.160; 6.9.11 to before 6.10 Fixed in 6.1.191, 6.6.160, 6.10 Patch available CNA
  • Linux VendorLinux Affected 6.10 and later Fixed in 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.1.9, 7.2 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 6.1.191, 6.6.160, 6.10
  • Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.114, 6.18.57, 7.1.9, 7.2

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-74733
  2. 2026-10-03 Alias added: GHSA-p6rq-qpqh-5f25
  3. 2026-10-16 Fix available: Linux/[email protected], Linux/Linux@bf3f37c2d40b51deb79aea910f28999d7c8c6b5a · CNA
  4. 2026-10-16 1 new reference · CNA
  5. 2026-10-18 CISA SSVC decision points changed
  6. 2026-10-21 Fix available: Linux/Linux@41255e64eb9dd87b0b8675f4e47a9c67bcef6e39, Linux/Linux@5d05c4252c09ce10624be2197853c80bf87424e4, Linux/[email protected] +1 · CNA
  7. 2026-10-21 2 new references · CNA
  8. 2026-10-29 Affected versions changed · Red Hat
  9. 2026-10-30 Fix available: Linux/Linux@58ed56c093a857c19f04cf3db1f02d2e793aec88, Linux/[email protected] · CNA
  10. 2026-10-30 1 new reference · CNA

References

Other 6

  • 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 21741 →

Sources

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