CVE-2024-26584: net: tls: handle backlogging of crypto requests
Vulnerability summary
CVE-2024-26584 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.74% chance of exploitation in the next 30 days, higher than 54.6% of scored vulnerabilities.
Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 54 · Related 49Timeline
- 21-02-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.74%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.74% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu112 products
- linux< 5.4.0-190.210 | < 5.15.0-112.122
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.4.0-1129.139 | < 5.15.0-1063.69
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ a54667f6728c2714a400f3c884727da74b6d1717, < 3ade391adc584f17b5570fd205de3ad029090368 | ≥ a54667f6728c2714a400f3c884727da74b6d1717, < cd1bbca03f3c1d845ce274c0d0a66de8e5929f72 | ≥ a54667f6728c2714a400f3c884727da74b6d1717, < 13eca403876bbea3716e82cdfe6f1e6febb38754 | ≥ a54667f6728c2714a400f3c884727da74b6d1717, < ab6397f072e5097f267abf5cb08a8004e6b17694 | ≥ a54667f6728c2714a400f3c884727da74b6d1717, < 8590541473188741055d27b955db0777569438e3 | 4.16
- linux_kernel≥ 4.16.0, < 6.1.84 | ≥ 6.2.0, < 6.6.18 | ≥ 6.7.0, < 6.7.6
Debian1 product
- linux< 6.1.85-1 | < 6.7.7-1
3 vendors · 115 products
