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TI-2025-25518 Aliases CVE-2025-38177GHSA-9pjq-r2xc-hgwc

sch_hfsc: make hfsc_qlen_notify() idempotent

Priority LOW 33CWE-459Published · 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: 24 fixed, 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: sch_hfsc: make hfsc_qlen_notify() idempotent hfsc_qlen_notify() is not idempotent either and not friendly to its callers, like fq_codel_dequeue(). Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life: 1. update_vf() decreases cl->cl_nactive, so we can check whether it is non-zero before calling it. 2. eltree_remove() always removes RB node cl->el_node, but we can use RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00217 12th percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.4.297, 5.10.241, 5.15.190 +5Red Hat: 11 advisoriesRed Hat: 24 fixed, 4 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
LinuxLinux4.14 and later5.4.297, 5.10.241, 5.15.190, 6.1.138, 6.6.90, 6.12.28, 6.14.6, 6.15Patch availableCNA
  • Linux VendorLinux Affected 4.14 and later Fixed in 5.4.297, 5.10.241, 5.15.190, 6.1.138, 6.6.90, 6.12.28, 6.14.6, 6.15 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 5.4.297; 5.5 to before 5.10.241; 5.11 to before 5.15.190; 5.16 to before 6.1.138; 6.2 to before 6.6.90; 6.7 to before 6.12.28; 6.13 to before 6.14.6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*6.15 rc1VulnerableLinux
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 5.4.297; 5.5 to before 5.10.241; 5.11 to before 5.15.190; 5.16 to before 6.1.138; 6.2 to before 6.6.90; 6.7 to before 6.12.28; 6.13 to before 6.14.6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* Versions 6.15 rc1 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.4.297, 5.10.241, 5.15.190, 6.1.138, 6.6.90, 6.12.28, 6.14.6, 6.15

Red Hat 11 advisories

  • RHSA-2025:15035 Released 2025-09-02 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.170.1.el8_4, kernel-4.18.0-305.170.1.el8_4, kernel-abi-stablelists-4.18.0-305.170.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.170.1.el8_4, kernel-4.18.0-305.170.1.el8_4, kernel-abi-stablelists-4.18.0-305.170.1.el8_4 +14
  • RHSA-2025:15016 Released 2025-09-02 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.4) kernel-tools-libs-devel-5.14.0-427.85.1.el9_4, libperf-5.14.0-427.85.1.el9_4
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) kernel-64k-debug-devel-5.14.0-427.85.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.85.1.el9_4, kernel-64k-devel-5.14.0-427.85.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool-7.3.0-427.85.1.el9_4, kernel-5.14.0-427.85.1.el9_4, kernel-64k-5.14.0-427.85.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt-5.14.0-427.85.1.el9_4, kernel-rt-core-5.14.0-427.85.1.el9_4, kernel-rt-debug-5.14.0-427.85.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4) kernel-rt-5.14.0-427.85.1.el9_4, kernel-rt-core-5.14.0-427.85.1.el9_4, kernel-rt-debug-5.14.0-427.85.1.el9_4 +11
  • RHSA-2025:14748 Released 2025-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.137.1.el7, kernel-3.10.0-1160.137.1.el7, kernel-abi-whitelists-3.10.0-1160.137.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.137.1.el7, kernel-tools-libs-devel-3.10.0-1160.137.1.el7
Show 8 more Red Hat advisories
  • RHSA-2025:14744 Released 2025-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.144.1.el9_0, kernel-debug-devel-matched-5.14.0-70.144.1.el9_0, kernel-devel-5.14.0-70.144.1.el9_0 +5
    • Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.144.1.el9_0, kernel-5.14.0-70.144.1.el9_0, kernel-abi-stablelists-5.14.0-70.144.1.el9_0 +14
  • RHSA-2025:14746 Released 2025-08-27 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.137.1.rt56.1289.el7, kernel-rt-debug-3.10.0-1160.137.1.rt56.1289.el7, kernel-rt-debug-devel-3.10.0-1160.137.1.rt56.1289.el7 +4
  • RHSA-2025:14742 Released 2025-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.165.1.el8_2, kernel-4.18.0-193.165.1.el8_2, kernel-abi-whitelists-4.18.0-193.165.1.el8_2 +14
  • RHSA-2025:14692 Released 2025-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.158.1.el8_6, kernel-4.18.0-372.158.1.el8_6, kernel-abi-stablelists-4.18.0-372.158.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.158.1.el8_6, kernel-4.18.0-372.158.1.el8_6, kernel-abi-stablelists-4.18.0-372.158.1.el8_6 +19
    • Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.158.1.el8_6, kernel-4.18.0-372.158.1.el8_6, kernel-abi-stablelists-4.18.0-372.158.1.el8_6 +14
  • RHSA-2025:14696 Released 2025-08-27 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.134.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.134.1.el9_2, kernel-64k-devel-5.14.0-284.134.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.134.1.el9_2, kernel-5.14.0-284.134.1.el9_2, kernel-64k-5.14.0-284.134.1.el9_2 +29
  • RHSA-2025:14691 Released 2025-08-27 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.134.1.rt14.419.el9_2, kernel-rt-core-5.14.0-284.134.1.rt14.419.el9_2, kernel-rt-debug-5.14.0-284.134.1.rt14.419.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.134.1.rt14.419.el9_2, kernel-rt-core-5.14.0-284.134.1.rt14.419.el9_2, kernel-rt-debug-5.14.0-284.134.1.rt14.419.el9_2 +11
  • RHSA-2025:14511 Released 2025-08-25 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.107.1.el8_8, kernel-4.18.0-477.107.1.el8_8, kernel-abi-stablelists-4.18.0-477.107.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.107.1.el8_8, kernel-4.18.0-477.107.1.el8_8, kernel-abi-stablelists-4.18.0-477.107.1.el8_8 +14
  • RHSA-2025:14413 Released 2025-08-25 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux Server AUS (v. 7.7) bpftool-3.10.0-1062.99.1.el7, kernel-3.10.0-1062.99.1.el7, kernel-abi-whitelists-3.10.0-1062.99.1.el7 +8
    • Red Hat Enterprise Linux Server Optional AUS (v. 7.7) kernel-tools-libs-devel-3.10.0-1062.99.1.el7

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 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.4)Fixed RHSA-2025:15016
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:14744
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2025:14696
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:15016
Red Hat Enterprise Linux BaseOS AUS (v. 8.2)Fixed RHSA-2025:14742
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2025:15035
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2025:14692
Red Hat Enterprise Linux BaseOS E4S (v.8.6)Fixed RHSA-2025:14692
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2025:14511
Red Hat Enterprise Linux BaseOS E4S (v.9.0)Fixed RHSA-2025:14744
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2025:14696
Red Hat Enterprise Linux BaseOS EUS (v.9.4)Fixed RHSA-2025:15016
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2025:15035
Red Hat Enterprise Linux BaseOS TUS (v.8.6)Fixed RHSA-2025:14692
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2025:14511
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2025:14691
Red Hat Enterprise Linux Real Time EUS (v.9.4)Fixed RHSA-2025:15016
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2025:14691
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)Fixed RHSA-2025:15016
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2025:14748
Red Hat Enterprise Linux Server AUS (v. 7.7)Fixed RHSA-2025:14413
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2025:14748
Red Hat Enterprise Linux Server Optional AUS (v. 7.7)Fixed RHSA-2025:14413
Red Hat Enterprise Linux for Real Time (v. 7 ELS)Fixed RHSA-2025:14746

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-38177
  2. 2026-10-03 Alias added: GHSA-9pjq-r2xc-hgwc

References

Patch 8

Advisory 2

  • 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