CVE-2023-54041io_uring: fix memory leak when removing provided buffers
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: io_uring: fix memory leak when removing provided buffers When removing provided buffers, io_buffer structs are not being disposed of, leading to a memory leak. They can't be freed individually, because they are allocated in page-sized groups. They need to be added to some free list instead, such as io_buffers_cache. All callers already hold the lock protecting it, apart from when destroying buffers, so had to extend the lock there.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 before ac48787f58d1068f4e06d627c1135784d64b4c72; from cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 before c117c15927772d1624c29c092b6bd3f47c7faa48; from cc3cec8367cba76a8ae4c271eba8450f3efc1ba3 before b4a72c0589fdea6259720375426179888969d6a2 | CNA record |
References
- https://git.kernel.org/stable/c/ac48787f58d1068f4e06d627c1135784d64b4c72
- https://git.kernel.org/stable/c/c117c15927772d1624c29c092b6bd3f47c7faa48
- https://git.kernel.org/stable/c/b4a72c0589fdea6259720375426179888969d6a2
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.