Trending
CVE-2026-31447

CVE detail

CVE-2026-31447

In the Linux kernel, the following vulnerability has been resolved: ext4: reject mount if bigalloc with s_first_data_block != 0 bigalloc with s_first_data_block != 0 is not supported, reject mounting it.

CVSS 7.8 · HighBuzz score 39.9

Buzz score

Why this CVE is surfacing

Buzz score total 39.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 24.9 · diversity 15.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

24.9

11 evidence mentions in the snapshot

Diversity score

15.0

3 sources across 3 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

11 source links · newest first

CVE-2026-31447 ext4: reject mount if bigalloc with s_first_data_block != 0Microsoft MSRC
Information published.
vendormsrc.microsoft.comApr 23, 2026, 8:08 AM
https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlcert-portal.siemens.com
No excerpt available.
Vendor Advisorycert-portal.siemens.comApr 22, 2026, 2:16 PM
https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlcert-portal.siemens.com
No excerpt available.
Vendor Advisorycert-portal.siemens.comApr 22, 2026, 2:16 PM
https://git.kernel.org/stable/c/d787d3ae96648dc14a3b7ca8fde817177e82c1c7git.kernel.org
No excerpt available.
Patchgit.kernel.orgApr 22, 2026, 2:16 PM
https://git.kernel.org/stable/c/b77de3fceafbb39f30e4ff5dc986f863d5456417git.kernel.org
No excerpt available.
Patchgit.kernel.orgApr 22, 2026, 2:16 PM
https://git.kernel.org/stable/c/ad1f6d608f33f59d21a3d025615d6786a6443998git.kernel.org
No excerpt available.
Patchgit.kernel.orgApr 22, 2026, 2:16 PM
https://git.kernel.org/stable/c/7d5b04290156c3fc316eecc86a4f9d201ab7d44agit.kernel.org
No excerpt available.
Patchgit.kernel.orgApr 22, 2026, 2:16 PM
https://git.kernel.org/stable/c/7b58c110b4e1f028eb38eec9ed3555e9be81c8b0git.kernel.org
No excerpt available.
Patchgit.kernel.orgApr 22, 2026, 2:16 PM
https://git.kernel.org/stable/c/5ad6d994255e27a3254079dfb50ca861fc31f2d0git.kernel.org
No excerpt available.
Patchgit.kernel.orgApr 22, 2026, 2:16 PM
https://git.kernel.org/stable/c/3a926957cc95899ef88529710836edadc03c71a1git.kernel.org
No excerpt available.
Patchgit.kernel.orgApr 22, 2026, 2:16 PM
https://git.kernel.org/stable/c/3822743dc20386d9897e999dbb990befa3a5b3f8git.kernel.org
No excerpt available.
Patchgit.kernel.orgApr 22, 2026, 2:16 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence

CVE-2026-13446
IBM Langflow OSS 1.0.0 through 1.10.1 contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communic…
CVSS 9.8 · Critical
1 mention
CVE-2026-13445
IBM Langflow OSS 1.0.0 through 1.10.1 can allow an authenticated attacker to exploit the SaveToFile component to read and modify another user's uploaded files by specifying absolu…
CVSS 8.1 · High
1 mention
CVE-2026-8859
IBM Langflow OSS 1.0.0 through 1.10.0 Langflow could allow an attacker to write arbitrary files to unintended locations due to improper input validation in the APIRequest componen…
CVSS 9.9 · Critical
1 mention
CVE-2026-8635
IBM Langflow OSS 1.0.0 through 1.10.0 allows authenticated users to escalate privileges to superuser by directly manipulating the database, execute arbitrary system commands, and…
CVSS 9.9 · Critical
1 mention
CVE-2026-8505
IBM Langflow OSS 1.0.0 through 1.10.0 has a vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system…
CVSS 9.8 · Critical
1 mention
CVE-2026-8481
IBM Langflow OSS 1.0.0 through 1.10.0 contain a critical remote code execution vulnerability in the code validation API endpoint. The POST /api/v1/validate/code endpoint accepts u…
CVSS 9.9 · Critical
1 mention

External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-31447.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

Sign-in required. Shodan requires you to sign in to run these filter searches.

Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:o:linux:linux_kernelSearch this product on Shodan

Exact CVE query

Eligible paid Shodan plan required

Shodan's exact vuln: filter is separate from the product searches above and requires an eligible paid Shodan plan.

vuln:CVE-2026-31447Search this CVE on Shodan

These are outbound search links only. cvebuzz makes no Shodan API call, uses no Shodan API key, and does not display live result counts.

Metadata

Canonical fields

NVD status

Modified

Published

Apr 22, 2026

Modified

Jul 14, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE IDs

Unavailable

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Local. The attacker needs local access to the vulnerable system.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): Required. Another user must take an action for exploitation to succeed.
Scope (S): Unchanged. Impacts remain within the vulnerable security authority.
Confidentiality Impact (C): High. There is a total or serious impact to this security property.
Integrity Impact (I): High. There is a total or serious impact to this security property.
Availability Impact (A): High. There is a total or serious impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses