An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 91.6.1 (excluding) |
| Firefox | Mozilla | * | 97.0.2 (excluding) |
| Firefox | Mozilla | * | 97.3.0 (excluding) |
| Firefox_focus | Mozilla | * | 97.3.0 (excluding) |
| Thunderbird | Mozilla | * | 91.6.2 (excluding) |
| Red Hat Enterprise Linux 7 | RedHat | firefox-0:91.7.0-3.el7_9 | * |
| Red Hat Enterprise Linux 7 | RedHat | thunderbird-0:91.7.0-2.el7_9 | * |
| Red Hat Enterprise Linux 8 | RedHat | firefox-0:91.7.0-3.el8_5 | * |
| Red Hat Enterprise Linux 8 | RedHat | thunderbird-0:91.7.0-2.el8_5 | * |
| Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions | RedHat | firefox-0:91.7.0-3.el8_1 | * |
| Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions | RedHat | thunderbird-0:91.7.0-2.el8_1 | * |
| Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | firefox-0:91.7.0-3.el8_2 | * |
| Red Hat Enterprise Linux 8.2 Extended Update Support | RedHat | thunderbird-0:91.7.0-2.el8_2 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | firefox-0:91.7.0-3.el8_4 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support | RedHat | thunderbird-0:91.7.0-2.el8_4 | * |
| Firefox | Ubuntu | bionic | * |
| Firefox | Ubuntu | devel | * |
| Firefox | Ubuntu | focal | * |
| Firefox | Ubuntu | impish | * |
| Firefox | Ubuntu | jammy | * |
| Firefox | Ubuntu | kinetic | * |
| Firefox | Ubuntu | lunar | * |
| Firefox | Ubuntu | upstream | * |
Potential Mitigations
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1758070
- https://www.mozilla.org/security/advisories/mfsa2022-09/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1758070
- https://www.mozilla.org/security/advisories/mfsa2022-09/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26486