crypto: pcrypt - Fix hungtask for PADATA_RESET
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.
- Published
- May 21, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.3% · 19th percentile
- CWE
- —
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Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel2.6.34 and later · before 4.14.331
- linux linux kernel4.15 and later · before 4.19.300
- linux linux kernel4.20 and later · before 5.4.262
- linux linux kernel5.5 and later · before 5.10.202
- linux linux kernel5.11 and later · before 5.15.140
- linux linux kernel5.16 and later · before 6.1.64
- linux linux kernel6.2 and later · before 6.5.13
- linux linux kernel6.6 and later · before 6.6.3
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 2.6.34affected
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before fb2d3a50a8f29a3c66682bb426144f40e32ab818affected · git
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before 039fec48e062504f14845124a1a25eb199b2ddc0affected · git
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before c9c1334697301c10e6918d747ed38abfbc0c96e7affected · git
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before e97bf4ada7dddacd184c3e196bd063b0dc71b41daffected · git
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before 546c1796ad1ed0d87dab3c4b5156d75819be2316affected · git
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before c55fc098fd9d2dca475b82d00ffbcaf97879d77eaffected · git
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before e134f3aba98e6c801a693f540912c2d493718ddfaffected · git
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before 372636debe852913529b1716f44addd94fff2d28affected · git
- 16295bec6398a3eedc9377e1af6ff4c71b98c300 and later · before 8f4f68e788c3a7a696546291258bfa5fdb215523affected · git
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.64-1 | 6.1.64-1 |
| Debian:13 | linux | before 6.6.8-1 | 6.6.8-1 |
| Red Hat:rhel_eus:9.4::appstream | bpftool-debuginfo | before 0:7.3.0-427.68.1.el9_4 | 0:7.3.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-64k-debug-debuginfo | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-64k-debug-devel | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-64k-debug-devel-matched | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-64k-debuginfo | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-64k-devel | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-64k-devel-matched | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-debug-debuginfo | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-debug-devel | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-debug-devel-matched | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-debuginfo | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-debuginfo-common-aarch64 | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-debuginfo-common-ppc64le | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-debuginfo-common-s390x | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-debuginfo-common-x86_64 | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-devel | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-devel-matched | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-doc | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-rt-debug-debuginfo | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-rt-debuginfo | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-tools-debuginfo | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
| Red Hat:rhel_eus:9.4::appstream | kernel-zfcpdump-debuginfo | before 0:5.14.0-427.68.1.el9_4 | 0:5.14.0-427.68.1.el9_4 |
+60
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
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Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 039fec48e062504f14845124a1a25eb199b2ddc0 | Vendor (CNA) |
| Linux Linux | 372636debe852913529b1716f44addd94fff2d28 | Vendor (CNA) |
| Linux Linux | 546c1796ad1ed0d87dab3c4b5156d75819be2316 | Vendor (CNA) |
| Linux Linux | 8f4f68e788c3a7a696546291258bfa5fdb215523 | Vendor (CNA) |
| Linux Linux | c55fc098fd9d2dca475b82d00ffbcaf97879d77e | Vendor (CNA) |
| Linux Linux | c9c1334697301c10e6918d747ed38abfbc0c96e7 | Vendor (CNA) |
| Linux Linux | e134f3aba98e6c801a693f540912c2d493718ddf | Vendor (CNA) |
| Linux Linux | e97bf4ada7dddacd184c3e196bd063b0dc71b41d | Vendor (CNA) |
| Linux Linux | fb2d3a50a8f29a3c66682bb426144f40e32ab818 | Vendor (CNA) |
| debian:linux | 6.1.64-1 · Debian:12 | Package registry (OSV) |
| red hat:bpftool-debuginfo | 0:7.3.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-debuginfo | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-64k-debug-devel-matched | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-64k-debuginfo | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-64k-devel-matched | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-debug-debuginfo | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-debug-devel-matched | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-debuginfo | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| red hat:kernel-debuginfo-common-aarch64 | 0:5.14.0-427.68.1.el9_4 · Red Hat:rhel_eus:9.4::appstream | Package registry (OSV) |
| suse:kernel-default | 4.12.14-122.272.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | Package registry (OSV) |
| suse:kernel-source | 4.12.14-122.272.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-122.272.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kgraft-patch-SLE12-SP5_Update_72 | 1-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/039fec48e062504f14845124a1a25eb199b2ddc0
- git.kernel.org/stable/c/372636debe852913529b1716f44addd94fff2d28
- git.kernel.org/stable/c/546c1796ad1ed0d87dab3c4b5156d75819be2316
- git.kernel.org/stable/c/8f4f68e788c3a7a696546291258bfa5fdb215523
- git.kernel.org/stable/c/c55fc098fd9d2dca475b82d00ffbcaf97879d77e
- git.kernel.org/stable/c/c9c1334697301c10e6918d747ed38abfbc0c96e7
- git.kernel.org/stable/c/e134f3aba98e6c801a693f540912c2d493718ddf
- git.kernel.org/stable/c/e97bf4ada7dddacd184c3e196bd063b0dc71b41d
- git.kernel.org/stable/c/fb2d3a50a8f29a3c66682bb426144f40e32ab818
Vendor advisories and official records. Exploit/PoC links are deliberately left out.