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 Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.8 | 6.8 |
| Linux Kernel | >=4.16.0<6.1.84 | |
| Linux Kernel | >=6.2.0<6.6.18 | |
| Linux Kernel | >=6.7.0<6.7.6 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- https://git.kernel.org/stable/c/13eca403876bbea3716e82cdfe6f1e6febb38754
- https://git.kernel.org/stable/c/3ade391adc584f17b5570fd205de3ad029090368
- https://git.kernel.org/stable/c/8590541473188741055d27b955db0777569438e3
- https://git.kernel.org/stable/c/ab6397f072e5097f267abf5cb08a8004e6b17694
- https://git.kernel.org/stable/c/cd1bbca03f3c1d845ce274c0d0a66de8e5929f72
- https://launchpad.net/bugs/cve/CVE-2024-26584
- https://lore.kernel.org/linux-cve-announce/2024022148-showpiece-yanking-107c@gregkh/T/#u
- https://github.com/torvalds/linux/commit/859054147318
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2265534
- https://access.redhat.com/errata/RHSA-2024:1882
- https://access.redhat.com/errata/RHSA-2024:1881
- https://access.redhat.com/errata/RHSA-2024:2394
- https://access.redhat.com/security/cve/CVE-2024-26584
- https://access.redhat.com/errata/RHSA-2024:4211
- https://access.redhat.com/errata/RHSA-2024:4352
- https://access.redhat.com/errata/RHSA-2024:4447
- https://access.redhat.com/errata/RHSA-2024:5255
- https://bugzilla.redhat.com/show_bug.cgi?id=2265519
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26584
- https://nvd.nist.gov/vuln/detail/CVE-2024-26584
- https://security-tracker.debian.org/tracker/CVE-2024-26584
- https://ubuntu.com/security/CVE-2024-26584
- https://git.kernel.org/linus/8590541473188741055d27b955db0777569438e3
Frequently Asked Questions
What is the severity of CVE-2024-26584?
CVE-2024-26584 has been categorized as a high-severity vulnerability due to potential impact on cryptographic operations.
How do I fix CVE-2024-26584?
To mitigate CVE-2024-26584, update your Linux kernel to version 6.8 or any recommended patched version listed by your distribution.
What software is affected by CVE-2024-26584?
CVE-2024-26584 affects various versions of the Linux kernel, particularly versions 4.16.0 to 6.7.6 and 6.2.0 to 6.6.18.
Is CVE-2024-26584 remotely exploitable?
CVE-2024-26584 is not considered remotely exploitable, as it requires local access to exploit the vulnerability.
What type of vulnerability is CVE-2024-26584?
CVE-2024-26584 is classified as a vulnerability related to cryptographic request handling in the Linux kernel.
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