Medium 6.5Published Jun 2, 2023

CVE-2023-29548A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result.

Updated under an hour ago (Oct 27, 2026, 5:23 AM ET)

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It affects mozilla firefox and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thunderbird < 102.10.

CVSS: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 24, 2026
First seen by InfoSec Signals: Oct 24, 2026

Affected products

Affected products

mozilla firefox mozilla:firefox	before 112.0	NVD
mozilla firefox_esr mozilla:firefox_esr	before 102.10	NVD
mozilla firefox_mobile mozilla:firefox_mobile	before 112.0	NVD
mozilla focus mozilla:focus	before 112.0	NVD
mozilla thunderbird mozilla:thunderbird	before 102.10	NVD

References

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1822754	issue-tracking, permissions-required, vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-13/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-14/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-15/	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.