CVE-2023-52813
crypto: pcrypt - Fix hungtask for PADATA_RESET
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 79% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < fb2d3a50a8f29a3c66682bb426144f40e32ab818
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < 039fec48e062504f14845124a1a25eb199b2ddc0
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < c9c1334697301c10e6918d747ed38abfbc0c96e7
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < e97bf4ada7dddacd184c3e196bd063b0dc71b41d
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < 546c1796ad1ed0d87dab3c4b5156d75819be2316
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < c55fc098fd9d2dca475b82d00ffbcaf97879d77e
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < e134f3aba98e6c801a693f540912c2d493718ddf
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < 372636debe852913529b1716f44addd94fff2d28
- affected 16295bec6398a3eedc9377e1af6ff4c71b98c300 – < 8f4f68e788c3a7a696546291258bfa5fdb215523
- affected 2.6.34
- unaffected < 2.6.34
- unaffected 4.14.331 – ≤ 4.14.*
- unaffected 4.19.300 – ≤ 4.19.*
- unaffected 5.4.262 – ≤ 5.4.*
- unaffected 5.10.202 – ≤ 5.10.*
- unaffected 5.15.140 – ≤ 5.15.*
- unaffected 6.1.64 – ≤ 6.1.*
- unaffected 6.5.13 – ≤ 6.5.*
- unaffected 6.6.3 – ≤ 6.6.*
- unaffected 6.7 – ≤ *
References (9)
- https://git.kernel.org/stable/c/fb2d3a50a8f29a3c66682bb426144f40e32ab818 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/039fec48e062504f14845124a1a25eb199b2ddc0 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c9c1334697301c10e6918d747ed38abfbc0c96e7 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/e97bf4ada7dddacd184c3e196bd063b0dc71b41d (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/546c1796ad1ed0d87dab3c4b5156d75819be2316 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/c55fc098fd9d2dca475b82d00ffbcaf97879d77e (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/e134f3aba98e6c801a693f540912c2d493718ddf (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/372636debe852913529b1716f44addd94fff2d28 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/8f4f68e788c3a7a696546291258bfa5fdb215523 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2023-52813)Record last updated .