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CVE-2021-47195— spi: fix use-after-free of the add_lock mutex

EPSS 0.02% · P5
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I. Basic Information for CVE-2021-47195

Vulnerability Information
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Vulnerability Title
spi: fix use-after-free of the add_lock mutex
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free of the add_lock mutex Commit 6098475d4cb4 ("spi: Fix deadlock when adding SPI controllers on SPI buses") introduced a per-controller mutex. But mutex_unlock() of said lock is called after the controller is already freed: spi_unregister_controller(ctlr) -> put_device(&ctlr->dev) -> spi_controller_release(dev) -> mutex_unlock(&ctrl->add_lock) Move the put_device() after the mutex_unlock().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于add_lock mutex存在释放后重用漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux aa3f3d7bef59583f2d3234173105a27ff61ef8fe ~ 54c2c96eafcfd242e52e932ab54ace4784efe1dd -
LinuxLinux 5.15 -

II. Public POCs for CVE-2021-47195

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III. Intelligence Information for CVE-2021-47195

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Same Patch Batch · Linux · 2024-04-10 · 39 CVEs total

CVE-2021-47210usb: typec: tipd: Remove WARN_ON in tps6598x_block_read
CVE-2021-47200drm/prime: Fix use after free in mmap with drm_gem_ttm_mmap
CVE-2021-47201iavf: free q_vectors before queues in iavf_disable_vf
CVE-2021-47202thermal: Fix NULL pointer dereferences in of_thermal_ functions
CVE-2021-47203scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()
CVE-2021-47204net: dpaa2-eth: fix use-after-free in dpaa2_eth_remove
CVE-2021-47205clk: sunxi-ng: Unregister clocks/resets when unbinding
CVE-2021-47206usb: host: ohci-tmio: check return value after calling platform_get_resource()
CVE-2021-47207ALSA: gus: fix null pointer dereference on pointer block
CVE-2021-47209sched/fair: Prevent dead task groups from regaining cfs_rq's
CVE-2021-47199net/mlx5e: CT, Fix multiple allocations and memleak of mod acts
CVE-2021-47211ALSA: usb-audio: fix null pointer dereference on pointer cs_desc
CVE-2021-47212net/mlx5: Update error handler for UCTX and UMEM
CVE-2021-47214hugetlb, userfaultfd: fix reservation restore on userfaultfd error
CVE-2021-47215net/mlx5e: kTLS, Fix crash in RX resync flow
CVE-2021-47216scsi: advansys: Fix kernel pointer leak
CVE-2021-47217x86/hyperv: Fix NULL deref in set_hv_tscchange_cb() if Hyper-V setup fails
CVE-2021-47218selinux: fix NULL-pointer dereference when hashtab allocation fails
CVE-2021-47219scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()
CVE-2021-47189btrfs: fix memory ordering between normal and ordered work functions

Showing top 20 of 39 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47195

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