crypto: pcrypt - restore callback for non-parallel fallback
Priority LOW 39CWE-662Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - restore callback for non-parallel fallback pcrypt installs pcrypt_aead_done() on the child AEAD request before trying to submit it through padata. If padata_do_parallel() returns -EBUSY, pcrypt falls back to calling the child AEAD directly. That fallback must not keep the padata completion callback. Otherwise an asynchronous completion runs pcrypt_aead_done() even though the request was never enrolled in padata. Restore the original request callback and callback data before calling the child AEAD directly. This keeps the fallback path aligned with a direct AEAD request while leaving the parallel path unchanged.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00501 43rd percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.261, 5.15.212, 6.1.178 +8Red Hat: 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.10.231 to before 5.10.261; 5.15.174 to before 5.15.212; 6.1.120 to before 6.1.178; 6.6.64 to before 6.6.145; 6.12.2 to before 6.12.96; 4.19.325 to before 4.20; 5.4.287 to before 5.5; 6.11.11 to before 6.12 | 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 4.20, 5.5, 6.12 | Patch available | CNA |
| Linux | Linux | 6.13 and later | 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 5.10.231 to before 5.10.261; 5.15.174 to before 5.15.212; 6.1.120 to before 6.1.178; 6.6.64 to before 6.6.145; 6.12.2 to before 6.12.96; 4.19.325 to before 4.20; 5.4.287 to before 5.5; 6.11.11 to before 6.12 Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 4.20, 5.5, 6.12 Patch available CNA
- Linux VendorLinux Affected 6.13 and later Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4, 7.2 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.19.325 to before 4.20; 5.4.287 to before 5.5; 5.10.231 to before 5.10.261; 5.15.174 to before 5.15.212; 6.1.120 to before 6.1.178; 6.6.64 to before 6.6.145; 6.11.11 to before 6.12; 6.12.2 to before 6.12.96; 6.13 to before 6.18.39; 6.19 to before 7.1.4 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.19.325 to before 4.20; 5.4.287 to before 5.5; 5.10.231 to before 5.10.261; 5.15.174 to before 5.15.212; 6.1.120 to before 6.1.178; 6.6.64 to before 6.6.145; 6.11.11 to before 6.12; 6.12.2 to before 6.12.96; 6.13 to before 6.18.39; 6.19 to before 7.1.4 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 4.20, 5.5, 6.12
- Fix · CNA Linux (Linux) Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2026-64312
- 2026-10-03 Alias added: GHSA-5wjw-79g3-g2x9
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-20 Weakness changed · CISA ADP
- 2026-10-27 CVSS score changed · Red Hat
- 2026-10-29 Affected versions changed · Red Hat
- 2026-11-06 Affected versions changed · Red Hat
References
Patch 8
- https://git.kernel.org/stable/c/81ce16d938db9b88cdc231522c0358395ae8c6b5
- https://git.kernel.org/stable/c/3920c5f6edc341729d20d0507e466c6d3b11f372
- https://git.kernel.org/stable/c/ae93c5b3e2a2968b56d772ca1d06615927b7cc36
- https://git.kernel.org/stable/c/82789a44415e3e31168229421b138278dfb16412
- https://git.kernel.org/stable/c/4711ca06bd169a2cbc9cc59a6de2ed512c41a880
- https://git.kernel.org/stable/c/c4bd2f4c35b0e15b6040c2f7e7e7986780c066cf
- https://git.kernel.org/stable/c/83fa1397d5853de1e27dd52ec44b068ff358ca18
- https://git.kernel.org/stable/c/ed459fe319376e876de433d12b6c6772e612ca36
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- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-64312 · CVE Program
- CVE-2026-64312 · NVD
- FIRST EPSS
- GHSA-5wjw-79g3-g2x9 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-64312 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences