8.8
CVE-2021-43535
- EPSS 1.19%
- Veröffentlicht 08.12.2021 22:15:09
- Zuletzt bearbeitet 21.11.2024 06:29:22
- Quelle security@mozilla.org
- Teams Watchlist Login
- Unerledigt Login
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Mozilla ≫ Firefox ESR Version < 91.3.0
Mozilla ≫ Thunderbird Version < 91.3.0
Debian ≫ Debian Linux Version9.0
Debian ≫ Debian Linux Version10.0
Debian ≫ Debian Linux Version11.0
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 1.19% | 0.782 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| nvd@nist.gov | 8.8 | 2.8 | 5.9 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
|
| nvd@nist.gov | 6.8 | 8.6 | 6.4 |
AV:N/AC:M/Au:N/C:P/I:P/A:P
|
CWE-416 Use After Free
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.