net: tls: handle backlogging of crypto requests (Linux Linux)

CVE-2024-26584
CRITICAL 9.8

At a glance

Source
NVD
EPSS
EPSS 0.74 % · percentile 55 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

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.

Weaknesses (CWE)

  • CWE-755 — Improper Handling of Exceptional Conditions

References

Scores

VersionScoreVectorScored by
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1CRITICAL 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected a54667f6728c2714a400f3c884727da74b6d1717 < 3ade391adc584f17b5570fd205de3ad029090368 ; affected a54667f6728c2714a400f3c884727da74b6d1717 < cd1bbca03f3c1d845ce274c0d0a66de8e5929f72 ; affected a54667f6728c2714a400f3c884727da74b6d1717 < 13eca403876bbea3716e82cdfe6f1e6febb38754 ; affected a54667f6728c2714a400f3c884727da74b6d1717 < ab6397f072e5097f267abf5cb08a8004e6b17694 ; affected a54667f6728c2714a400f3c884727da74b6d1717 < 8590541473188741055d27b955db0777569438e3
Linux · Linuxaffected 4.16 ; unaffected 0 < 4.16 ; unaffected 5.15.160 ≤ 5.15.* ; unaffected 6.1.84 ≤ 6.1.* ; unaffected 6.6.18 ≤ 6.6.* ; unaffected 6.7.6 ≤ 6.7.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD