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CVE-2022-48821— misc: fastrpc: avoid double fput() on failed usercopy

EPSS 0.05% · P14
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I. Basic Information for CVE-2022-48821

Vulnerability Information
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Vulnerability Title
misc: fastrpc: avoid double fput() on failed usercopy
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: avoid double fput() on failed usercopy If the copy back to userland fails for the FASTRPC_IOCTL_ALLOC_DMA_BUFF ioctl(), we shouldn't assume that 'buf->dmabuf' is still valid. In fact, dma_buf_fd() called fd_install() before, i.e. "consumed" one reference, leaving us with none. Calling dma_buf_put() will therefore put a reference we no longer own, leading to a valid file descritor table entry for an already released 'file' object which is a straight use-after-free. Simply avoid calling dma_buf_put() and rely on the process exit code to do the necessary cleanup, if needed, i.e. if the file descriptor is still valid.
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misc模块中发现双重文件描述符释放问题。在FASTRPC_IOCTL_ALLOC_DMA_BUFFioctl函数失败时，不应假设buf->dmabuf仍然有效。
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 6cffd79504ce040f460831030d3069fa1c99bb71 ~ 4e6fd2b5fcf8e7119305a6042bd92e7f2b9ed215 -
LinuxLinux 5.1 -

II. Public POCs for CVE-2022-48821

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III. Intelligence Information for CVE-2022-48821

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Same Patch Batch · Linux · 2024-07-16 · 98 CVEs total

CVE-2022-48832audit: don't deref the syscall args when checking the openat2 open_how::flags
CVE-2022-48826drm/vc4: Fix deadlock on DSI device attach error
CVE-2022-48822usb: f_fs: Fix use-after-free for epfile
CVE-2022-48819tcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case
CVE-2022-48820phy: stm32: fix a refcount leak in stm32_usbphyc_pll_enable()
CVE-2022-48818net: dsa: mv88e6xxx: don't use devres for mdiobus
CVE-2022-48817net: dsa: ar9331: register the mdiobus under devres
CVE-2022-48823scsi: qedf: Fix refcount issue when LOGO is received during TMF
CVE-2022-48830can: isotp: fix potential CAN frame reception race in isotp_rcv()
CVE-2022-48831ima: fix reference leak in asymmetric_verify()
CVE-2022-48828NFSD: Fix ia_size underflow
CVE-2022-48834usb: usbtmc: Fix bug in pipe direction for control transfers
CVE-2022-48833btrfs: skip reserved bytes warning on unmount after log cleanup failure
CVE-2022-48835scsi: mpt3sas: Page fault in reply q processing
CVE-2022-48837usb: gadget: rndis: prevent integer overflow in rndis_set_response()
CVE-2022-48836Input: aiptek - properly check endpoint type
CVE-2022-48838usb: gadget: Fix use-after-free bug by not setting udc->dev.driver
CVE-2022-48839net/packet: fix slab-out-of-bounds access in packet_recvmsg()
CVE-2022-48840iavf: Fix hang during reboot/shutdown
CVE-2022-48842ice: Fix race condition during interface enslave

Showing top 20 of 98 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-48821

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