In the Linux kernel, the following vulnerability has been resolved: net: stmmac: Fix accessing freed irq affinity_hint In stmmac_request_irq_multi_msi(), a pointer to the stack variable cpu_mask is passed to irq_set_affinity_hint(). This value is stored in irq_desc->affinity_hint, but once stmmac_request_irq_multi_msi() returns, the pointer becomes dangling. The affinity_hint is exposed via procfs with S_IRUGO permissions, allowing any unprivileged process to read it. Accessing this stale pointer can lead to: - a kernel oops or panic if the referenced memory has been released and unmapped, or - leakage of kernel data into userspace if the memory is re-used for other purposes. All platforms that use stmmac with PCI MSI (Intel, Loongson, etc) are affected.
Conclusion & alert: CVE-2025-23155 is rated Low Risk (34.6/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.15%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
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 | 2026-06-09 | 0.11% | 0.15% | +0.05% |
| 2 | 2026-02-25 | 0.02% | 0.11% | +0.09% |
| 3 | 2025-05-02 | — | 0.02% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.5 | 3.1 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2025-23155 unimportant 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-2025-23155 |
redhat
|
— | — | https://access.redhat.com/security/cve/CVE-2025-23155 |
suse
|
medium | CVE-2025-23155 severity moderate: SUSE including 442 source package names (15.7.20.5.1:kernel-default-6.4.0-150700.53.6.1, 2.1.3-7.43:kernel-rt-6.4.0-33.1, …), 974 product×package rows across 217 product lines (Container suse/hpc/warewulf4-x86_64/sle-hpc-node, Container suse/sl-micro/6.0/rt-os-container, … (217 product lines)): Fixed 654, Known Affected 226, Known Not Affected 94. | https://www.suse.com/security/cve/CVE-2025-23155/ |
ubuntu
|
medium | CVE-2025-23155 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, ignored 164, released 130, not-affected 74, needed 35, needs-triage 2, pending 1. | https://ubuntu.com/security/CVE-2025-23155 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| linux | linux_kernel | >= 5.13, < 6.12.36 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.13, < 6.13.12 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.14, < 6.14.3 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |