FKIE_CVE-2024-35880

Vulnerability from fkie_nvd - Published: 2024-05-19 09:15 - Updated: 2025-09-24 21:09
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: hold io_buffer_list reference over mmap If we look up the kbuf, ensure that it doesn't get unregistered until after we're done with it. Since we're inside mmap, we cannot safely use the io_uring lock. Rely on the fact that we can lookup the buffer list under RCU now and grab a reference to it, preventing it from being unregistered until we're done with it. The lookup returns the io_buffer_list directly with it referenced.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/561e4f9451d65fc2f7eef564e0064373e3019793Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5fd8e2359498043e0b5329a05f02d10a9eb91eb9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/65938e81df2197203bda4b9a0c477e7987218d66Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/561e4f9451d65fc2f7eef564e0064373e3019793Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5fd8e2359498043e0b5329a05f02d10a9eb91eb9Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/65938e81df2197203bda4b9a0c477e7987218d66Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.7
linux linux_kernel 6.7
linux linux_kernel 6.7
linux linux_kernel 6.7
linux linux_kernel 6.7
linux linux_kernel 6.7
linux linux_kernel 6.9
linux linux_kernel 6.9
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/kbuf: hold io_buffer_list reference over mmap\n\nIf we look up the kbuf, ensure that it doesn\u0027t get unregistered until\nafter we\u0027re done with it. Since we\u0027re inside mmap, we cannot safely use\nthe io_uring lock. Rely on the fact that we can lookup the buffer list\nunder RCU now and grab a reference to it, preventing it from being\nunregistered until we\u0027re done with it. The lookup returns the\nio_buffer_list directly with it referenced."
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  "id": "CVE-2024-35880",
  "lastModified": "2025-09-24T21:09:03.843",
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          "baseScore": 5.5,
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          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
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          "scope": "UNCHANGED",
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