CVE-2026-40493

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Source

https://cve.org/CVERecord?id=CVE-2026-40493

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40493.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-40493

Aliases

GHSA-rcqx-gc76-r9mv

Downstream

DEBIAN-CVE-2026-40493

UBUNTU-CVE-2026-40493

Published

2026-04-18T01:41:14.664Z

Modified

2026-07-08T08:12:34.695319399Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

SAIL has heap buffer overflow in PSD decoder — bpp mismatch in LAB 16-bit mode

Details

SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. Prior to commit c930284445ea3ff94451ccd7a57c999eca3bc979, the PSD codec computes bytes-per-pixel (bpp) from raw header fields channels * depth, but the pixel buffer is allocated based on the resolved pixel format. For LAB mode with channels=3, depth=16, bpp = (3*16+7)/8 = 6, but the format BPP40_CIE_LAB allocates only 5 bytes per pixel. Every pixel write overshoots, causing a deterministic heap buffer overflow on every row. Commit c930284445ea3ff94451ccd7a57c999eca3bc979 contains a patch.

Database specific

{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "c930284445ea3ff94451ccd7a57c999eca3bc979"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40493.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-787"
    ]
}

References

Affected packages

Git / github.com/happyseafox/sail

Affected ranges

Type

GIT

Repo

https://github.com/happyseafox/sail

Events

Introduced

Fixed

c930284445ea3ff94451ccd7a57c999eca3bc979

Database specific

{
    "source": "REFERENCES"
}

Affected versions

v0.*

v0.9.0

v0.9.0-pre1

v0.9.0-pre10

v0.9.0-pre11

v0.9.0-pre12

v0.9.0-pre13

v0.9.0-pre14

v0.9.0-pre15

v0.9.0-pre16

v0.9.0-pre17

v0.9.0-pre18

v0.9.0-pre19

v0.9.0-pre2

v0.9.0-pre20

v0.9.0-pre21

v0.9.0-pre22

v0.9.0-pre23

v0.9.0-pre3

v0.9.0-pre4

v0.9.0-pre5

v0.9.0-pre6

v0.9.0-pre7

v0.9.0-pre8

v0.9.0-pre9

v0.9.0-rc1

v0.9.0-rc2

v0.9.0-rc3

v0.9.1

v0.9.10

v0.9.2

v0.9.3

v0.9.4

v0.9.5

v0.9.6

v0.9.7

v0.9.8

v0.9.9

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40493.json"