Bugzilla – Bug 1220186
VUL-0: CVE-2024-26584: kernel: net: tls: handle backlogging of crypto requests
Last modified: 2024-07-15 09:22:10 UTC
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. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26584 https://www.cve.org/CVERecord?id=CVE-2024-26584 https://git.kernel.org/stable/c/8590541473188741055d27b955db0777569438e3
Offending commit (94524d8fc965) found in: - SLE12-SP5 - SLE15-SP4 - SLE15-SP5 - SLE15-SP6 - cve/linux-5.3 - stable Fixing commit: https://git.kernel.org/stable/c/8590541473188741055d27b955db0777569438e3