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TI-2025-26838 Aliases CVE-2025-40168GHSA-9cp7-m95w-q87h

smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().

Priority LOW 36Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 32 fixed, 1 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: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match(). smc_clc_prfx_match() is called from smc_listen_work() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu(). Note that the returned value of smc_clc_prfx_match() is not used in the caller.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0042 36th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.187, 6.6.156, 6.12.108 +2Red Hat: 10 advisoriesRed Hat: 32 fixed, 1 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
LinuxLinux4.11 and later6.1.187, 6.6.156, 6.12.108, 6.17.3, 6.18Patch availableCNA
  • Linux VendorLinux Affected 4.11 and later Fixed in 6.1.187, 6.6.156, 6.12.108, 6.17.3, 6.18 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 6.1.187, 6.6.156, 6.12.108, 6.17.3, 6.18

Red Hat 10 advisories

  • RHSA-2026:27708 Released 2026-06-22 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.123.1.el9_6, libperf-5.14.0-570.123.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.123.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.123.1.el9_6, kernel-64k-devel-5.14.0-570.123.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.123.1.el9_6, kernel-64k-5.14.0-570.123.1.el9_6, kernel-64k-core-5.14.0-570.123.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.123.1.el9_6, kernel-rt-64k-5.14.0-570.123.1.el9_6, kernel-rt-64k-core-5.14.0-570.123.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.123.1.el9_6, kernel-rt-core-5.14.0-570.123.1.el9_6, kernel-rt-debug-5.14.0-570.123.1.el9_6 +11
  • RHSA-2026:9643 Released 2026-04-22 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.189.1.el8_4, kernel-4.18.0-305.189.1.el8_4, kernel-abi-stablelists-4.18.0-305.189.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.189.1.el8_4, kernel-4.18.0-305.189.1.el8_4, kernel-abi-stablelists-4.18.0-305.189.1.el8_4 +14
  • RHSA-2026:9514 Released 2026-04-22 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.188.1.el8_6, kernel-4.18.0-372.188.1.el8_6, kernel-abi-stablelists-4.18.0-372.188.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.188.1.el8_6, kernel-4.18.0-372.188.1.el8_6, kernel-abi-stablelists-4.18.0-372.188.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.188.1.el8_6, kernel-4.18.0-372.188.1.el8_6, kernel-abi-stablelists-4.18.0-372.188.1.el8_6 +14
Show 7 more Red Hat advisories
  • RHSA-2026:9513 Released 2026-04-22 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.195.1.el8_2, kernel-4.18.0-193.195.1.el8_2, kernel-abi-whitelists-4.18.0-193.195.1.el8_2 +14
  • RHSA-2026:6954 Released 2026-04-08 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.135.1.el8_8, kernel-4.18.0-477.135.1.el8_8, kernel-abi-stablelists-4.18.0-477.135.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.135.1.el8_8, kernel-4.18.0-477.135.1.el8_8, kernel-abi-stablelists-4.18.0-477.135.1.el8_8 +14
  • RHSA-2026:4111 Released 2026-03-09 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.63.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.63.1.el10_0, kernel-64k-devel-6.12.0-55.63.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.63.1.el10_0, kernel-64k-6.12.0-55.63.1.el10_0, kernel-64k-core-6.12.0-55.63.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.63.1.el10_0, libperf-6.12.0-55.63.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.63.1.el10_0, kernel-rt-64k-6.12.0-55.63.1.el10_0, kernel-rt-64k-core-6.12.0-55.63.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.63.1.el10_0, kernel-rt-core-6.12.0-55.63.1.el10_0, kernel-rt-debug-6.12.0-55.63.1.el10_0 +11
  • RHSA-2026:3488 Released 2026-03-02 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.36.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.36.1.el9_7, kernel-64k-devel-5.14.0-611.36.1.el9_7 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.36.1.el9_7, kernel-64k-5.14.0-611.36.1.el9_7, kernel-64k-core-5.14.0-611.36.1.el9_7 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.36.1.el9_7, libperf-5.14.0-611.36.1.el9_7
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.36.1.el9_7, kernel-rt-64k-5.14.0-611.36.1.el9_7, kernel-rt-64k-core-5.14.0-611.36.1.el9_7 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.36.1.el9_7, kernel-rt-core-5.14.0-611.36.1.el9_7, kernel-rt-debug-5.14.0-611.36.1.el9_7 +9
  • RHSA-2026:3275 Released 2026-02-25 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.39.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.39.1.el10_1, kernel-64k-devel-6.12.0-124.39.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.39.1.el10_1, kernel-64k-6.12.0-124.39.1.el10_1, kernel-64k-core-6.12.0-124.39.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.39.1.el10_1, libperf-6.12.0-124.39.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.39.1.el10_1, kernel-rt-64k-6.12.0-124.39.1.el10_1, kernel-rt-64k-core-6.12.0-124.39.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.39.1.el10_1, kernel-rt-core-6.12.0-124.39.1.el10_1, kernel-rt-debug-6.12.0-124.39.1.el10_1 +9
  • RHSA-2026:2821 Released 2026-02-17 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.105.1.rt7.446.el8_10, kernel-rt-core-4.18.0-553.105.1.rt7.446.el8_10, kernel-rt-debug-4.18.0-553.105.1.rt7.446.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.105.1.rt7.446.el8_10, kernel-rt-core-4.18.0-553.105.1.rt7.446.el8_10, kernel-rt-debug-4.18.0-553.105.1.rt7.446.el8_10 +7
  • RHSA-2026:2720 Released 2026-02-16 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.105.1.el8_10, kernel-4.18.0-553.105.1.el8_10, kernel-abi-stablelists-4.18.0-553.105.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.105.1.el8_10

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 CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:27708
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:3275
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:3488
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:4111
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:27708
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:3275
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:2720
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:3488
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2026:9513
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:9643
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:9514
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2026:9514
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:6954
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:4111
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:27708
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:9643
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2026:9514
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:6954
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:2720
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:3275
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:3488
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:4111
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:2821
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:2821
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:3275
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:3488
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:4111
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:27708
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:3275
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:3488
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:4111
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:27708
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-40168
  2. 2026-10-03 Alias added: GHSA-9cp7-m95w-q87h

References

Other 5

  • 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