surfio IRAP header size fields cause out-of-bounds reads

published 2026-08-18 2 mo ago modified 2026-09-30 39 d ago also GHSA-rcr2-hggw-43wm , PYSEC-2026-3701 , EUVD-2026-78671

cvss: 9.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

Surfio is a library for reading and writing surface files. Prior to 0.0.19, surfio does not correctly validate size fields in IRAP files, leading to a buffer overflow when untrusted files are parsed. The severity assumes surfio is used to parse untrusted files in a networking context such as a web service. This issue is fixed in version 0.0.19.

Patch / fix

fixed in 1 links 4

pypi surfio 0.0.19

github.com/equinor/surfio@1619750 commit
github.com/equinor/surfio@e009c0c commit
github.com/equinor/surfio#86 pull request
github.com/equinor/surfio/releases/tag/0.0.19 release

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 52 d ago (2026-09-17)

Exploit prediction

0.74% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	surfio	<0.0.19	0.0.19

Affected products

equinor surfio

Classification

Weakness

CWE-125 Out-of-bounds Read

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary