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TI-2025-26374 Aliases CVE-2025-39698GHSA-q7v5-hrgw-5gjh

io_uring/futex: ensure io_futex_wait() cleans up properly on failure

Priority LOW 39CWE-672Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 10 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring/futex: ensure io_futex_wait() cleans up properly on failure The io_futex_data is allocated upfront and assigned to the io_kiocb async_data field, but the request isn't marked with REQ_F_ASYNC_DATA at that point. Those two should always go together, as the flag tells io_uring whether the field is valid or not. Additionally, on failure cleanup, the futex handler frees the data but does not clear ->async_data. Clear the data and the flag in the error path as well. Thanks to Trend Micro Zero Day Initiative and particularly ReDress for reporting this.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00202 10th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.12.44, 6.16.4, 6.17Red Hat: 2 advisoriesRed Hat: 10 fixed, 1 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
LinuxLinux6.7 and later6.12.44, 6.16.4, 6.17Patch availableCNA
  • Linux VendorLinux Affected 6.7 and later Fixed in 6.12.44, 6.16.4, 6.17 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*6.7 to before 6.12.44; 6.13 to before 6.16.4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*6.17 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*6.17 rc2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.7 to before 6.12.44; 6.13 to before 6.16.4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* Versions 6.17 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* Versions 6.17 rc2 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.12.44, 6.16.4, 6.17

Red Hat 2 advisories

  • RHSA-2025:16904 Released 2025-09-29 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-55.37.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.37.1.el10_0, kernel-64k-devel-6.12.0-55.37.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-55.37.1.el10_0, kernel-64k-6.12.0-55.37.1.el10_0, kernel-64k-core-6.12.0-55.37.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-55.37.1.el10_0, libperf-6.12.0-55.37.1.el10_0
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-55.37.1.el10_0, kernel-rt-64k-6.12.0-55.37.1.el10_0, kernel-rt-64k-core-6.12.0-55.37.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-55.37.1.el10_0, kernel-rt-core-6.12.0-55.37.1.el10_0, kernel-rt-debug-6.12.0-55.37.1.el10_0 +11
  • RHSA-2025:16880 Released 2025-09-29 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-570.49.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.49.1.el9_6, kernel-64k-devel-5.14.0-570.49.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-570.49.1.el9_6, kernel-64k-5.14.0-570.49.1.el9_6, kernel-64k-core-5.14.0-570.49.1.el9_6 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-570.49.1.el9_6, libperf-5.14.0-570.49.1.el9_6
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-570.49.1.el9_6, kernel-rt-64k-5.14.0-570.49.1.el9_6, kernel-rt-64k-core-5.14.0-570.49.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-570.49.1.el9_6, kernel-rt-core-5.14.0-570.49.1.el9_6, kernel-rt-debug-5.14.0-570.49.1.el9_6 +11

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:16904
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:16880
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2025:16904
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:16880
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:16904
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:16880
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2025:16904
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:16880
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2025:16904
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:16880
Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-39698
  2. 2026-10-03 Alias added: GHSA-q7v5-hrgw-5gjh

References

Patch 3

Advisory 1

  • 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
See all 15278 →

Sources

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