# CVE-2021-47056: linux: In the Linux kernel, the following vulnerability has been resolved:  crypto: qat - ADF_STATUS_PF_RUNNING should be se...

CVE-2021-47056 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47056, released February 29, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47056
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 29, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  crypto: qat - ADF_STATUS_PF_RUNNING should be set after adf_dev_init  ADF_STATUS_PF_RUNNING is (only) used and checked by adf_vf2pf_shutdown() before calling adf_iov_putmsg()->mutex_lock(vf2pf_lock), however the vf2pf_lock is initialized in adf_dev_init(), which can fail and when it fail, the vf2pf_lock is either not initialized or destroyed, a subsequent use of vf2pf_lock will cause issue. To fix this issue, only set this flag if adf_dev_init() returns 0.  [    7.178404] BUG: KASAN: user-memory-access in __mutex_lock.isra.0+0x1ac/0x7c0 [    7.180345] Call Trace: [    7.182576]  mutex_lock+0xc9/0xd0 [    7.183257]  adf_iov_putmsg+0x118/0x1a0 [intel_qat] [    7.183541]  adf_vf2pf_shutdown+0x4d/0x7b [intel_qat] [    7.183834]  adf_dev_shutdown+0x172/0x2b0 [intel_qat] [    7.184127]  adf_probe+0x5e9/0x600 [qat_dh895xccvf]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.10.38-1 | [DEBIAN-CVE-2021-47056](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47056.md) | Feb 29, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.10.38-1 | [DEBIAN-CVE-2021-47056](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47056.md) | Feb 29, 2024 |
| Linux | linux Debian 14 | 5.10.38-1 | [DEBIAN-CVE-2021-47056](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47056.md) | Feb 29, 2024 |

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