Race condition, use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
| Version | Base score | Base severity | Vector |
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| CAPEC ID | Description |
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| Event | Date |
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| Version | Base score | Base severity | Vector |
|---|---|---|---|
| 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CAPEC ID | Description |
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| Event | Date |
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| Hyperlink | Resource |
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A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Race condition, use-after-free in the Graphics: WebRender component
| Version | Base score | Base severity | Vector |
|---|---|---|---|
| 3.1 | 7.5 | HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CAPEC ID | Description |
|---|
RHSA-2026:8427: Red Hat Enterprise Linux Server (v. 7 ELS)
RHSA-2026:7843: Red Hat Enterprise Linux AppStream EUS (v. 10.0)
RHSA-2026:8315: Red Hat Enterprise Linux AppStream EUS (v. 10.0)
RHSA-2026:5931: Red Hat Enterprise Linux AppStream (v. 10)
RHSA-2026:6342: Red Hat Enterprise Linux AppStream (v. 10)
RHSA-2026:5932: Red Hat Enterprise Linux AppStream (v. 8)
RHSA-2026:6917: Red Hat Enterprise Linux AppStream (v. 8)
RHSA-2026:7840: Red Hat Enterprise Linux AppStream AUS (v. 8.2)
RHSA-2026:8285: Red Hat Enterprise Linux AppStream AUS (v. 8.2)
RHSA-2026:7858: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
RHSA-2026:8850: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
RHSA-2026:7842: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)
RHSA-2026:8289: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)
RHSA-2026:7838: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)
RHSA-2026:8288: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)
RHSA-2026:7839: Red Hat Enterprise Linux AppStream E4S (v.9.0)
RHSA-2026:8286: Red Hat Enterprise Linux AppStream E4S (v.9.0)
RHSA-2026:7841: Red Hat Enterprise Linux AppStream E4S (v.9.2)
RHSA-2026:8287: Red Hat Enterprise Linux AppStream E4S (v.9.2)
RHSA-2026:7845: Red Hat Enterprise Linux AppStream EUS (v.9.4)
RHSA-2026:8290: Red Hat Enterprise Linux AppStream EUS (v.9.4)
RHSA-2026:7837: Red Hat Enterprise Linux AppStream EUS (v.9.6)
RHSA-2026:8284: Red Hat Enterprise Linux AppStream EUS (v.9.6)
RHSA-2026:5930: Red Hat Enterprise Linux AppStream (v. 9)
RHSA-2026:6188: Red Hat Enterprise Linux AppStream (v. 9)
| Event | Date |
|---|---|
| Reported to Red Hat. | 2026-03-24 13:01:57 |
| Made public. | 2026-03-24 12:30:20 |