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TI-2025-26499 Aliases CVE-2025-39825GHSA-3f3q-q5cj-phc5

smb: client: fix race with concurrent opens in rename(2)

Priority LOW 33CWE-362Published · 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: 30 fixed, 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: smb: client: fix race with concurrent opens in rename(2) Besides sending the rename request to the server, the rename process also involves closing any deferred close, waiting for outstanding I/O to complete as well as marking all existing open handles as deleted to prevent them from deferring closes, which increases the race window for potential concurrent opens on the target file. Fix this by unhashing the dentry in advance to prevent any concurrent opens on the target.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00118 1st percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.150, 6.6.104, 6.12.45 +2Red Hat: 12 advisoriesRed Hat: 30 fixed, 2 without a fix

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

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.13 and later6.1.150, 6.6.104, 6.12.45, 6.16.5, 6.17Patch availableCNA
  • Linux VendorLinux Affected 5.13 and later Fixed in 6.1.150, 6.6.104, 6.12.45, 6.16.5, 6.17 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.13 to before 6.1.150; 6.2 to before 6.6.104; 6.7 to before 6.12.45; 6.13 to before 6.16.5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*6.17 rc1VulnerableLinux
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.13 to before 6.1.150; 6.2 to before 6.6.104; 6.7 to before 6.12.45; 6.13 to before 6.16.5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* Versions 6.17 rc1 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Linux (Linux) Fixed in 6.1.150, 6.6.104, 6.12.45, 6.16.5, 6.17

Red Hat 12 advisories

  • RHSA-2026:0576 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.161.1.el9_0, kernel-debug-devel-matched-5.14.0-70.161.1.el9_0, kernel-devel-5.14.0-70.161.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.161.1.el9_0, kernel-5.14.0-70.161.1.el9_0, kernel-abi-stablelists-5.14.0-70.161.1.el9_0 +14
  • RHSA-2026:0535 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.152.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.152.1.el9_2, kernel-64k-devel-5.14.0-284.152.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.152.1.el9_2, kernel-5.14.0-284.152.1.el9_2, kernel-64k-5.14.0-284.152.1.el9_2 +29
  • RHSA-2026:0532 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.124.1.el8_8, kernel-4.18.0-477.124.1.el8_8, kernel-abi-stablelists-4.18.0-477.124.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.124.1.el8_8, kernel-4.18.0-477.124.1.el8_8, kernel-abi-stablelists-4.18.0-477.124.1.el8_8 +14
Show 9 more Red Hat advisories
  • RHSA-2026:0533 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.183.1.el8_4, kernel-4.18.0-305.183.1.el8_4, kernel-abi-stablelists-4.18.0-305.183.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.183.1.el8_4, kernel-4.18.0-305.183.1.el8_4, kernel-abi-stablelists-4.18.0-305.183.1.el8_4 +14
  • RHSA-2026:0534 Released 2026-01-14 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-core-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-5.14.0-284.152.1.rt14.437.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-core-5.14.0-284.152.1.rt14.437.el9_2, kernel-rt-debug-5.14.0-284.152.1.rt14.437.el9_2 +11
  • RHSA-2026:0537 Released 2026-01-14 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-core-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-debug-5.14.0-70.161.1.rt21.233.el9_0 +9
    • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-core-5.14.0-70.161.1.rt21.233.el9_0, kernel-rt-debug-5.14.0-70.161.1.rt21.233.el9_0 +7
  • RHSA-2026:0489 Released 2026-01-13 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.106.1.el9_4, libperf-5.14.0-427.106.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.106.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.106.1.el9_4, kernel-64k-devel-5.14.0-427.106.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.106.1.el9_4, kernel-5.14.0-427.106.1.el9_4, kernel-64k-5.14.0-427.106.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.106.1.el9_4, kernel-rt-core-5.14.0-427.106.1.el9_4, kernel-rt-debug-5.14.0-427.106.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.106.1.el9_4, kernel-rt-core-5.14.0-427.106.1.el9_4, kernel-rt-debug-5.14.0-427.106.1.el9_4 +11
  • RHSA-2025:23445 Released 2025-12-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.178.1.el8_2, kernel-4.18.0-193.178.1.el8_2, kernel-abi-whitelists-4.18.0-193.178.1.el8_2 +14
  • RHSA-2025:23425 Released 2025-12-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.173.1.el8_6, kernel-4.18.0-372.173.1.el8_6, kernel-abi-stablelists-4.18.0-372.173.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.173.1.el8_6, kernel-4.18.0-372.173.1.el8_6, kernel-abi-stablelists-4.18.0-372.173.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.173.1.el8_6, kernel-4.18.0-372.173.1.el8_6, kernel-abi-stablelists-4.18.0-372.173.1.el8_6 +14
  • RHSA-2025:22388 Released 2025-12-01 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.87.1.el8_10, kernel-4.18.0-553.87.1.el8_10, kernel-abi-stablelists-4.18.0-553.87.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.87.1.el8_10
  • RHSA-2025:22387 Released 2025-12-01 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-core-4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-debug-4.18.0-553.87.1.rt7.428.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-core-4.18.0-553.87.1.rt7.428.el8_10, kernel-rt-debug-4.18.0-553.87.1.rt7.428.el8_10 +7
  • RHSA-2025:15429 Released 2025-09-08 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-570.41.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.41.1.el9_6, kernel-64k-devel-5.14.0-570.41.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-570.41.1.el9_6, kernel-64k-5.14.0-570.41.1.el9_6, kernel-64k-core-5.14.0-570.41.1.el9_6 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-570.41.1.el9_6, libperf-5.14.0-570.41.1.el9_6
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-570.41.1.el9_6, kernel-rt-64k-5.14.0-570.41.1.el9_6, kernel-rt-64k-core-5.14.0-570.41.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-570.41.1.el9_6, kernel-rt-core-5.14.0-570.41.1.el9_6, kernel-rt-debug-5.14.0-570.41.1.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 10AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:15429
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2026:0576
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:0535
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2025:22388
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:15429
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2025:23445
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:0533
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2025:23425
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2025:23425
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:0532
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2026:0576
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:0535
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:0533
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2025:23425
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:0532
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2025:22388
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:15429
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2025:22387
Red Hat Enterprise Linux NFV E4S (v.9.0)Fixed RHSA-2026:0537
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2025:22387
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:15429
Red Hat Enterprise Linux Real Time E4S (v.9.0)Fixed RHSA-2026:0537
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:0534
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2026:0489
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:15429
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:0534
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2026:0489
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-39825
  2. 2026-10-03 Alias added: GHSA-3f3q-q5cj-phc5

References

Patch 5

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