GHSA-79vc-v8qm-8x53 · Severity: medium — In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race...
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race condition on qfq_aggregate A race condition can occur when 'agg' is modified in qfq_change_agg (called during qfq_enqueue) while other threads access it concurrently. For example, qfq_dump_class may trigger a NULL dereference, and qfq_delete_class may cause a use-after-free. This patch addresses the issue by: 1. Moved qfq_destroy_class into the critical section. 2. Added sch_tree_lock protection to qfq_dump_class and qfq_dump_class_stats.
Conclusion & alert: CVE-2025-38477 is rated Low Risk (19.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-12-24 | 0.06% | 0.01% | -0.05% |
| 2 | 2025-11-27 | 0.02% | 0.06% | +0.05% |
| 3 | 2025-07-28 | — | 0.02% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.7 | 3.1 | MEDIUM |
|
1.0 | 3.6 | [email protected] |
GHSA-79vc-v8qm-8x53 · Severity: medium — In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: Fix race...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2025-38477 not yet assigned priority: Debian including 2 source packages (linux, linux-6.1), 6 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6. | https://security-tracker.debian.org/tracker/CVE-2025-38477 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2025-38477 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2025-38477/ |
ubuntu
|
medium | CVE-2025-38477 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1414 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1017, released 209, ignored 158, not-affected 23, needed 5, needs-triage 2. | https://ubuntu.com/security/CVE-2025-38477 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| linux | linux_kernel | >= 3.8, < 5.4.297 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.5, < 5.10.241 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.11, < 5.15.190 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.16, < 6.1.147 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.2, < 6.6.100 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.7, < 6.12.40 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.13, < 6.15.8 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | 6.16 | cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:* |
| linux | linux_kernel | 6.16 | cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:* |
| linux | linux_kernel | 6.16 | cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:* |
| linux | linux_kernel | 6.16 | cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:* |
| linux | linux_kernel | 6.16 | cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:* |
| linux | linux_kernel | 6.16 | cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |