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High severity7.8NVD Advisory· Published Mar 15, 2024· Updated Aug 4, 2026

CVE-2021-47123

CVE-2021-47123

Description

In the Linux kernel, the following vulnerability has been resolved:

io_uring: fix ltout double free on completion race

Always remove linked timeout on io_link_timeout_fn() from the master request link list, otherwise we may get use-after-free when first io_link_timeout_fn() puts linked timeout in the fail path, and then will be found and put on master's free.

Affected products

4
  • Linux/Kernel4 versions
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.11,<5.12.10
    • cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*
    • (no CPE)
    • (no CPE)range: 5.11

Patches

Vulnerability mechanics

References

2

News mentions

0

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