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TI-2025-26645 Aliases CVE-2025-39973GHSA-j9g6-49hr-w92p

i40e: add validation for ring_len param

Priority LOW 39Published · 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: 4 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: i40e: add validation for ring_len param The `ring_len` parameter provided by the virtual function (VF) is assigned directly to the hardware memory context (HMC) without any validation. To address this, introduce an upper boundary check for both Tx and Rx queue lengths. The maximum number of descriptors supported by the hardware is 8k-32. Additionally, enforce alignment constraints: Tx rings must be a multiple of 8, and Rx rings must be a multiple of 32.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00158 4th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.4.300, 5.10.245, 5.15.194 +5Red Hat: 12 advisoriesRed Hat: 4 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
LinuxLinux3.12 and later5.4.300, 5.10.245, 5.15.194, 6.1.155, 6.6.109, 6.12.50, 6.16.10, 6.17Patch availableCNA
  • Linux VendorLinux Affected 3.12 and later Fixed in 5.4.300, 5.10.245, 5.15.194, 6.1.155, 6.6.109, 6.12.50, 6.16.10, 6.17 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 5.4.300, 5.10.245, 5.15.194, 6.1.155, 6.6.109, 6.12.50, 6.16.10, 6.17

Red Hat 12 advisories

  • RHSA-2026:1623 Released 2026-02-02 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.146.1.rt56.1298.el7, kernel-rt-debug-3.10.0-1160.146.1.rt56.1298.el7, kernel-rt-debug-devel-3.10.0-1160.146.1.rt56.1298.el7 +4
  • RHSA-2026:1581 Released 2026-01-29 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.146.1.el7, kernel-3.10.0-1160.146.1.el7, kernel-abi-whitelists-3.10.0-1160.146.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.146.1.el7, kernel-tools-libs-devel-3.10.0-1160.146.1.el7
  • RHSA-2026:1445 Released 2026-01-28 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.126.1.el8_8, kernel-4.18.0-477.126.1.el8_8, kernel-abi-stablelists-4.18.0-477.126.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.126.1.el8_8, kernel-4.18.0-477.126.1.el8_8, kernel-abi-stablelists-4.18.0-477.126.1.el8_8 +14
Show 9 more Red Hat advisories
  • RHSA-2026:0643 Released 2026-01-15 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.181.1.el8_2, kernel-4.18.0-193.181.1.el8_2, kernel-abi-whitelists-4.18.0-193.181.1.el8_2 +14
  • RHSA-2026:0536 Released 2026-01-14 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.175.1.el8_6, kernel-4.18.0-372.175.1.el8_6, kernel-abi-stablelists-4.18.0-372.175.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.175.1.el8_6, kernel-4.18.0-372.175.1.el8_6, kernel-abi-stablelists-4.18.0-372.175.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.175.1.el8_6, kernel-4.18.0-372.175.1.el8_6, kernel-abi-stablelists-4.18.0-372.175.1.el8_6 +14
  • RHSA-2026:0173 Released 2026-01-07 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.104.1.el9_4, libperf-5.14.0-427.104.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.104.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.104.1.el9_4, kernel-64k-devel-5.14.0-427.104.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.104.1.el9_4, kernel-5.14.0-427.104.1.el9_4, kernel-64k-5.14.0-427.104.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.104.1.el9_4, kernel-rt-core-5.14.0-427.104.1.el9_4, kernel-rt-debug-5.14.0-427.104.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.104.1.el9_4, kernel-rt-core-5.14.0-427.104.1.el9_4, kernel-rt-debug-5.14.0-427.104.1.el9_4 +11
  • RHSA-2025:22571 Released 2025-12-02 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.47.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.47.1.el10_0, kernel-64k-devel-6.12.0-55.47.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.47.1.el10_0, kernel-64k-6.12.0-55.47.1.el10_0, kernel-64k-core-6.12.0-55.47.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.47.1.el10_0, libperf-6.12.0-55.47.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.47.1.el10_0, kernel-rt-64k-6.12.0-55.47.1.el10_0, kernel-rt-64k-core-6.12.0-55.47.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.47.1.el10_0, kernel-rt-core-6.12.0-55.47.1.el10_0, kernel-rt-debug-6.12.0-55.47.1.el10_0 +11
  • RHSA-2025:22395 Released 2025-12-01 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.16.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.16.1.el10_1, kernel-64k-devel-6.12.0-124.16.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.16.1.el10_1, kernel-64k-6.12.0-124.16.1.el10_1, kernel-64k-core-6.12.0-124.16.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.16.1.el10_1, libperf-6.12.0-124.16.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.16.1.el10_1, kernel-rt-64k-6.12.0-124.16.1.el10_1, kernel-rt-64k-core-6.12.0-124.16.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.16.1.el10_1, kernel-rt-core-6.12.0-124.16.1.el10_1, kernel-rt-debug-6.12.0-124.16.1.el10_1 +9
  • RHSA-2025:21933 Released 2025-11-24 · Red Hat rating Moderate
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.66.1.el9_6, libperf-5.14.0-570.66.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.66.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.66.1.el9_6, kernel-64k-devel-5.14.0-570.66.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.66.1.el9_6, kernel-64k-5.14.0-570.66.1.el9_6, kernel-64k-core-5.14.0-570.66.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.66.1.el9_6, kernel-rt-64k-5.14.0-570.66.1.el9_6, kernel-rt-64k-core-5.14.0-570.66.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.66.1.el9_6, kernel-rt-core-5.14.0-570.66.1.el9_6, kernel-rt-debug-5.14.0-570.66.1.el9_6 +11
  • RHSA-2025:21920 Released 2025-11-24 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.85.1.rt7.426.el8_10, kernel-rt-core-4.18.0-553.85.1.rt7.426.el8_10, kernel-rt-debug-4.18.0-553.85.1.rt7.426.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.85.1.rt7.426.el8_10, kernel-rt-core-4.18.0-553.85.1.rt7.426.el8_10, kernel-rt-debug-4.18.0-553.85.1.rt7.426.el8_10 +7
  • RHSA-2025:21917 Released 2025-11-24 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.85.1.el8_10, kernel-4.18.0-553.85.1.el8_10, kernel-abi-stablelists-4.18.0-553.85.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.85.1.el8_10
  • RHSA-2025:21469 Released 2025-11-17 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.8.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.8.1.el9_7, kernel-64k-devel-5.14.0-611.8.1.el9_7 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.8.1.el9_7, kernel-64k-5.14.0-611.8.1.el9_7, kernel-64k-core-5.14.0-611.8.1.el9_7 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.8.1.el9_7, libperf-5.14.0-611.8.1.el9_7
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.8.1.el9_7, kernel-rt-64k-5.14.0-611.8.1.el9_7, kernel-rt-64k-core-5.14.0-611.8.1.el9_7 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.8.1.el9_7, kernel-rt-core-5.14.0-611.8.1.el9_7, kernel-rt-debug-5.14.0-611.8.1.el9_7 +9

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 7AffectedNo fix yet
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-39973
  2. 2026-10-03 Alias added: GHSA-j9g6-49hr-w92p
  3. 2026-10-16 CISA SSVC decision points changed

References

Other 8

  • 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