{"cve":"CVE-2021-47056","nvd":{"published":"2024-02-29T23:15:07.530","modified":"2026-06-17T04:16:19.990","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - ADF_STATUS_PF_RUNNING should be set after adf_dev_init\n\nADF_STATUS_PF_RUNNING is (only) used and checked by adf_vf2pf_shutdown()\nbefore calling adf_iov_putmsg()->mutex_lock(vf2pf_lock), however the\nvf2pf_lock is initialized in adf_dev_init(), which can fail and when it\nfail, the vf2pf_lock is either not initialized or destroyed, a subsequent\nuse of vf2pf_lock will cause issue.\nTo fix this issue, only set this flag if adf_dev_init() returns 0.\n\n[    7.178404] BUG: KASAN: user-memory-access in __mutex_lock.isra.0+0x1ac/0x7c0\n[    7.180345] Call Trace:\n[    7.182576]  mutex_lock+0xc9/0xd0\n[    7.183257]  adf_iov_putmsg+0x118/0x1a0 [intel_qat]\n[    7.183541]  adf_vf2pf_shutdown+0x4d/0x7b [intel_qat]\n[    7.183834]  adf_dev_shutdown+0x172/0x2b0 [intel_qat]\n[    7.184127]  adf_probe+0x5e9/0x600 [qat_dh895xccvf]","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-908"],"references":["https://git.kernel.org/stable/c/05ec8192ee4bfdf2a8894a68350dac9f1a155fa6","https://git.kernel.org/stable/c/09d16cee6285d37cc76311c29add6d97a7e4acda","https://git.kernel.org/stable/c/1ea500ce6f7c9106e4a561d28e69215f3d451818","https://git.kernel.org/stable/c/1f50392650ae794a1aea41c213c6a3e1c824413c","https://git.kernel.org/stable/c/20fd40fc6f2c2b41dc6f637f88d494b14e9c21f1"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:46:54.846886191+00:00"},"epss":{"cve":"CVE-2021-47056","score":0.00226,"percentile":0.13354,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}