A double-free issue could have occurred in `sec_pkcs7_decoder_start_decrypt()` when handling an error path. Under specific conditions, the same symmetric key could have been freed twice, potentially leading to memory corruption. This vulnerability affects Firefox < 133, Thunderbird < 133, Firefox ESR < 128.7, and Thunderbird < 128.7.
The product calls free() twice on the same memory address.
Link | Tags |
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https://bugzilla.mozilla.org/show_bug.cgi?id=1899402 | issue tracking permissions required |
https://www.mozilla.org/security/advisories/mfsa2024-63/ | vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2024-67/ | vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2025-09/ | vendor advisory |
https://www.mozilla.org/security/advisories/mfsa2025-10/ | vendor advisory |