5.5

CVE-2023-52813: crypto: pcrypt - Fix hungtask for PADATA_RESET

Analyzed
AliasesUBUNTU-CVE-2023-52813DEBIAN-CVE-2023-52813
Published 21-05-2024Last modified 11-05-2026

Vulnerability summary

CVE-2023-52813 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.29%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 6
RHSA-2024:4211RHSA-2024:4352RHSA-2024:9315RHSA-2025:7526SUSE-SU-2024:2571-1SUSE-SU-2024:2896-1

Timeline

  1. 21-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.29% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu117 products
  • linuxAll versions (No fix recorded) | < 5.4.0-173.191 | < 5.15.0-100.110
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1120.130 | < 5.15.0-1056.61
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < fb2d3a50a8f29a3c66682bb426144f40e32ab818 | ≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < 039fec48e062504f14845124a1a25eb199b2ddc0 | ≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < c9c1334697301c10e6918d747ed38abfbc0c96e7 | ≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < e97bf4ada7dddacd184c3e196bd063b0dc71b41d | ≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < 546c1796ad1ed0d87dab3c4b5156d75819be2316 | ≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < c55fc098fd9d2dca475b82d00ffbcaf97879d77e | ≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < e134f3aba98e6c801a693f540912c2d493718ddf | ≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < 372636debe852913529b1716f44addd94fff2d28 | ≥ 16295bec6398a3eedc9377e1af6ff4c71b98c300, < 8f4f68e788c3a7a696546291258bfa5fdb215523 | 2.6.34
  • linux_kernel≥ 2.6.34, < 4.14.331 | ≥ 4.15, < 4.19.300 | ≥ 4.20, < 5.4.262 | ≥ 5.5, < 5.10.202 | ≥ 5.11, < 5.15.140 | ≥ 5.16, < 6.1.64 | ≥ 6.2, < 6.5.13 | ≥ 6.6, < 6.6.3
Debian1 product
  • linux< 6.1.64-1 | < 6.6.8-1

3 vendors · 120 products

References

13 links
Show all 13 references