d4 · tools · cve
Severity, exploit probability and exploitation status for one vulnerability, drawn from NVD, FIRST EPSS and CISA's exploited catalogue.
inferred from weakness class no curated mapping exists for this CVE; these are the techniques typically seen with CWE-787, CWE-456, CWE-123 vulnerabilities
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
Inferred from CWE-787.
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
Inferred from CWE-787.
Adversaries may exploit software vulnerabilities in client applications to execute code.
Inferred from CWE-787.
An adversary may rely upon specific actions by a user in order to gain execution.
via sub-technique T1204.002 Malicious File
Inferred from CWE-787.
Adversaries may execute their own malicious payloads by hijacking the way operating systems run programs.
Inferred from CWE-787.
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
Inferred from CWE-787.
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost. That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags. Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.
CVSS measures how bad exploitation would be; EPSS estimates how likely exploitation is within 30 days; the CISA listing means it is already happening. Read them together: a CVSS 9.8 with EPSS 0.04% is usually less urgent than a CVSS 7.2 on the exploited list. Data: NVD, FIRST EPSS, CISA KEV; detail is cached for a week, scores for a day. ATT&CK techniques come from the CTID KEV mappings project where a curated mapping exists, otherwise they are inferred from the weakness class and labelled as such. ATT&CK is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.