GHSA-vm72-v475-frvx · Severity: high — In the Linux kernel, the following vulnerability has been resolved: smb: smbdirect: introduce...
In the Linux kernel, the following vulnerability has been resolved: smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available The logic off managing recv credits by counting posted recv_io and granted credits is racy. That's because the peer might already consumed a credit, but between receiving the incoming recv at the hardware and processing the completion in the 'recv_done' functions we likely have a window where we grant credits, which don't really exist. So we better have a decicated counter for the available credits, which will be incremented when we posted new recv buffers and drained when we grant the credits to the peer.
Conclusion & alert: CVE-2026-31539 is rated Moderate Risk (42.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.43%). Mandatory action: Review affected assets and schedule remediation.
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 | 2026-06-15 | 0.05% | 0.43% | +0.38% |
| 2 | 2026-04-30 | 0.02% | 0.05% | +0.03% |
| 3 | 2026-04-25 | — | 0.02% | — |
Full EPSS history (3 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
GHSA-vm72-v475-frvx · Severity: high — In the Linux kernel, the following vulnerability has been resolved: smb: smbdirect: introduce...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-31539 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-31539 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-31539 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2026-31539/ |
ubuntu
|
medium | CVE-2026-31539 medium priority: Ubuntu including 161 source packages (linux, linux-allwinner-5.19, …), 1449 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): DNE 1048, ignored 169, not-affected 144, released 83, needs-triage 5. | https://ubuntu.com/security/CVE-2026-31539 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| linux | linux_kernel | >= 6.18, < 6.18.11 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.19, < 6.19.1 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |