Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: keys: Pin request_key_auth payload in instantiate paths A: request_key() B: KEYCTL_INSTANTIATE_IOV ================ ========================= create auth key store rka in auth key wait for helper get auth key load rka from auth key copy user payload sleep on #PF helper completed detach and free rka destroy auth key wake up use rka->target_key **USE-AFTER-FREE** Give request_key_auth payloads a refcount. Take a payload reference while authkey->sem stabilizes the payload and revocation state. Hold that reference across the instantiate and reject paths. Drop the auth key owning reference from revoke and destroy. [jarkko: Replaced the first two paragraphs of text with an actual concurrency scenario.]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b5f545c880a2a47947ba2118b2509644ab7a2969 before d8274181b0f28d450b42489723a5ba81042158d7; affected b5f545c880a2a47947ba2118b2509644ab7a2969 before 4982bfabce6b33b3c9eddb4fb900fe5568b7cf91; affected b5f545c880a2a47947ba2118b2509644ab7a2969 before 708709c65a1832a99b0eef8ae46e343ddaca3d06; affected b5f545c880a2a47947ba2118b2509644ab7a2969 before 35ab4db86774d82389e4b9559e26ab7f68d8e395; affected b5f545c880a2a47947ba2118b2509644ab7a2969 before f9b68632ac93cc742f2e411021c4dbfe452ea0c2; affected b5f545c880a2a47947ba2118b2509644ab7a2969 before 7216ce8cb12fee44e309503955bb83806b106129; affected b5f545c880a2a47947ba2118b2509644ab7a2969 before 83c0a1cb296d955d5f4d1f0bd8a769ba8ed8c29f; affected b5f545c880a2a47947ba2118b2509644ab7a2969 before fd15b457a86939c38aa12116adabd8ff686c5e51 |
| Linux / Linux | affected 2.6.16; unaffected 0 before 2.6.16; unaffected 5.10.260 through 5.10.*; unaffected 5.15.211 through 5.15.*; unaffected 6.1.177 through 6.1.*; unaffected 6.6.144 through 6.6.*; unaffected 6.12.95 through 6.12.*; unaffected 6.18.38 through 6.18.*; unaffected 7.1.3 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d8274181b0f28d450b42489723a5ba81042158d7
- https://git.kernel.org/stable/c/4982bfabce6b33b3c9eddb4fb900fe5568b7cf91
- https://git.kernel.org/stable/c/708709c65a1832a99b0eef8ae46e343ddaca3d06
- https://git.kernel.org/stable/c/35ab4db86774d82389e4b9559e26ab7f68d8e395
- https://git.kernel.org/stable/c/f9b68632ac93cc742f2e411021c4dbfe452ea0c2
- https://git.kernel.org/stable/c/7216ce8cb12fee44e309503955bb83806b106129
- https://git.kernel.org/stable/c/83c0a1cb296d955d5f4d1f0bd8a769ba8ed8c29f
- https://git.kernel.org/stable/c/fd15b457a86939c38aa12116adabd8ff686c5e51
ADP enrichment
No English description supplied.
No references supplied.