CVE-2026-40492
SAIL image library: memory corruption in XWD codec due to pixmap_depth/bits_per_pixel mismatch.
Is CVE-2026-40492 being exploited?
Not confirmed. CVE-2026-40492 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-40492?
CVE-2026-40492 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-40492?
Yes. A fix has been recorded for CVE-2026-40492. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-40492 affect?
CVE-2026-40492 affects SAIL image library (XWD codec). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-40492?
Update to fixed release containing the patch
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Memory corruption from out-of-bounds write during image decode; could crash or allow arbitrary code execution.
Patch when possible
- affected< 36aa5c7ec8a2bb35f6fb867a1177a6f141156b02
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.