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EUVD-2026-311695
European Vulnerability Database identifier assigned by ENISAReserved
2026-10-02 07:18
Assigner
ENISA
Alias of
a CVE record, shown under related vulnerabilities.
This identifier carries no description, severity or references of its own:
they belong to that CVE.
{
"assigner": "ENISA",
"date_reserved": "2026-10-02T07:18:40.654470+00:00",
"id": "EUVD-2026-311695"
}
CVE-2023-52813 (GCVE-0-2023-52813)
Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-05-11 19:33
VLAI
EPSS
VEX
Title
crypto: pcrypt - Fix hungtask for PADATA_RESET
Summary
In the Linux kernel, the following vulnerability has been resolved:
crypto: pcrypt - Fix hungtask for PADATA_RESET
We found a hungtask bug in test_aead_vec_cfg as follows:
INFO: task cryptomgr_test:391009 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Call trace:
__switch_to+0x98/0xe0
__schedule+0x6c4/0xf40
schedule+0xd8/0x1b4
schedule_timeout+0x474/0x560
wait_for_common+0x368/0x4e0
wait_for_completion+0x20/0x30
wait_for_completion+0x20/0x30
test_aead_vec_cfg+0xab4/0xd50
test_aead+0x144/0x1f0
alg_test_aead+0xd8/0x1e0
alg_test+0x634/0x890
cryptomgr_test+0x40/0x70
kthread+0x1e0/0x220
ret_from_fork+0x10/0x18
Kernel panic - not syncing: hung_task: blocked tasks
For padata_do_parallel, when the return err is 0 or -EBUSY, it will call
wait_for_completion(&wait->completion) in test_aead_vec_cfg. In normal
case, aead_request_complete() will be called in pcrypt_aead_serial and the
return err is 0 for padata_do_parallel. But, when pinst->flags is
PADATA_RESET, the return err is -EBUSY for padata_do_parallel, and it
won't call aead_request_complete(). Therefore, test_aead_vec_cfg will
hung at wait_for_completion(&wait->completion), which will cause
hungtask.
The problem comes as following:
(padata_do_parallel) |
rcu_read_lock_bh(); |
err = -EINVAL; | (padata_replace)
| pinst->flags |= PADATA_RESET;
err = -EBUSY |
if (pinst->flags & PADATA_RESET) |
rcu_read_unlock_bh() |
return err
In order to resolve the problem, we replace the return err -EBUSY with
-EAGAIN, which means parallel_data is changing, and the caller should call
it again.
v3:
remove retry and just change the return err.
v2:
introduce padata_try_do_parallel() in pcrypt_aead_encrypt and
pcrypt_aead_decrypt to solve the hungtask.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-23 17:18 UTC
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
16295bec6398a3eedc9377e1af6ff4c71b98c300 , < fb2d3a50a8f29a3c66682bb426144f40e32ab818
(git)
Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < 039fec48e062504f14845124a1a25eb199b2ddc0 (git) Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < c9c1334697301c10e6918d747ed38abfbc0c96e7 (git) Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < e97bf4ada7dddacd184c3e196bd063b0dc71b41d (git) Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < 546c1796ad1ed0d87dab3c4b5156d75819be2316 (git) Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < c55fc098fd9d2dca475b82d00ffbcaf97879d77e (git) Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < e134f3aba98e6c801a693f540912c2d493718ddf (git) Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < 372636debe852913529b1716f44addd94fff2d28 (git) Affected: 16295bec6398a3eedc9377e1af6ff4c71b98c300 , < 8f4f68e788c3a7a696546291258bfa5fdb215523 (git) |
|
| Linux | Linux |
Affected:
2.6.34
Unaffected: 0 , < 2.6.34 (semver) Unaffected: 4.14.331 , ≤ 4.14.* (semver) Unaffected: 4.19.300 , ≤ 4.19.* (semver) Unaffected: 5.4.262 , ≤ 5.4.* (semver) Unaffected: 5.10.202 , ≤ 5.10.* (semver) Unaffected: 5.15.140 , ≤ 5.15.* (semver) Unaffected: 6.1.64 , ≤ 6.1.* (semver) Unaffected: 6.5.13 , ≤ 6.5.* (semver) Unaffected: 6.6.3 , ≤ 6.6.* (semver) Unaffected: 6.7 , ≤ * (original_commit_for_fix) |
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Trend slope:
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(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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