ghsa-q4hp-86wf-hj44
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
tls: fix use-after-free on failed backlog decryption
When the decrypt request goes to the backlog and crypto_aead_decrypt returns -EBUSY, tls_do_decryption will wait until all async decryptions have completed. If one of them fails, tls_do_decryption will return -EBADMSG and tls_decrypt_sg jumps to the error path, releasing all the pages. But the pages have been passed to the async callback, and have already been released by tls_decrypt_done.
The only true async case is when crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so we can tell tls_sw_recvmsg that the data is available for immediate copy, but we need to notify tls_decrypt_sg (via the new ->async_done flag) that the memory has already been released.
{ "affected": [], "aliases": [ "CVE-2024-26800" ], "database_specific": { "cwe_ids": [], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2024-04-04T09:15:09Z", "severity": null }, "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: fix use-after-free on failed backlog decryption\n\nWhen the decrypt request goes to the backlog and crypto_aead_decrypt\nreturns -EBUSY, tls_do_decryption will wait until all async\ndecryptions have completed. If one of them fails, tls_do_decryption\nwill return -EBADMSG and tls_decrypt_sg jumps to the error path,\nreleasing all the pages. But the pages have been passed to the async\ncallback, and have already been released by tls_decrypt_done.\n\nThe only true async case is when crypto_aead_decrypt returns\n -EINPROGRESS. With -EBUSY, we already waited so we can tell\ntls_sw_recvmsg that the data is available for immediate copy, but we\nneed to notify tls_decrypt_sg (via the new -\u003easync_done flag) that the\nmemory has already been released.", "id": "GHSA-q4hp-86wf-hj44", "modified": "2024-04-04T15:30:34Z", "published": "2024-04-04T09:30:36Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26800" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89" } ], "schema_version": "1.4.0", "severity": [] }
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