CWE
755
EPSS
0.045%
Advisory Published
CVE Published
Updated

CVE-2024-26584: net: tls: handle backlogging of crypto requests

First published: Wed Feb 21 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: net: tls: handle backlogging of crypto requests Since we're setting the CRYPTO_TFM_REQ_MAY_BACKLOG flag on our requests to the crypto API, crypto_aead_{encrypt,decrypt} can return -EBUSY instead of -EINPROGRESS in valid situations. For example, when the cryptd queue for AESNI is full (easy to trigger with an artificially low cryptd.cryptd_max_cpu_qlen), requests will be enqueued to the backlog but still processed. In that case, the async callback will also be called twice: first with err == -EINPROGRESS, which it seems we can just ignore, then with err == 0. Compared to Sabrina's original patch this version uses the new tls_*crypt_async_wait() helpers and converts the EBUSY to EINPROGRESS to avoid having to modify all the error handling paths. The handling is identical.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel>=4.16.0<6.1.84
Linux Linux kernel>=6.2.0<6.6.18
Linux Linux kernel>=6.7.0<6.7.6
redhat/kernel<6.8
6.8
debian/linux<=5.10.223-1<=5.10.226-1
6.1.115-1
6.1.119-1
6.11.10-1

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