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CVE-2021-46952— NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds

EPSS 0.03% · P10
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I. Basic Information for CVE-2021-46952

Vulnerability Information
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Vulnerability Title
NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds Fix shift out-of-bounds in xprt_calc_majortimeo(). This is caused by a garbage timeout (retrans) mount option being passed to nfs mount, in this case from syzkaller. If the protocol is XPRT_TRANSPORT_UDP, then 'retrans' is a shift value for a 64-bit long integer, so 'retrans' cannot be >= 64. If it is >= 64, fail the mount and return an error.
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，该漏洞源于验证 UDP 重传以防止移位越界。
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 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 ~ 96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2 -
LinuxLinux 5.6 -

II. Public POCs for CVE-2021-46952

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III. Intelligence Information for CVE-2021-46952

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Same Patch Batch · Linux · 2024-02-27 · 67 CVEs total

CVE-2021-46950md/raid1: properly indicate failure when ending a failed write request
CVE-2021-46971perf/core: Fix unconditional security_locked_down() call
CVE-2021-46970bus: mhi: pci_generic: Remove WQ_MEM_RECLAIM flag from state workqueue
CVE-2021-46969bus: mhi: core: Fix invalid error returning in mhi_queue
CVE-2021-46957riscv/kprobe: fix kernel panic when invoking sys_read traced by kprobe
CVE-2021-46956virtiofs: fix memory leak in virtio_fs_probe()
CVE-2021-46955openvswitch: fix stack OOB read while fragmenting IPv4 packets
CVE-2021-46954net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets
CVE-2021-46953ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure
CVE-2021-46951tpm: efi: Use local variable for calculating final log size
CVE-2021-46958btrfs: fix race between transaction aborts and fsyncs leading to use-after-free
CVE-2021-46949sfc: farch: fix TX queue lookup in TX flush done handling
CVE-2021-46948sfc: farch: fix TX queue lookup in TX event handling
CVE-2021-46947sfc: adjust efx->xdp_tx_queue_count with the real number of initialized queues
CVE-2021-46945ext4: always panic when errors=panic is specified
CVE-2021-46944media: staging/intel-ipu3: Fix memory leak in imu_fmt
CVE-2021-46943media: staging/intel-ipu3: Fix set_fmt error handling
CVE-2021-46942io_uring: fix shared sqpoll cancellation hangs
CVE-2021-46941usb: dwc3: core: Do core softreset when switch mode
CVE-2021-46940tools/power turbostat: Fix offset overflow issue in index converting

Showing top 20 of 67 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-46952

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