CVE-2021-47123
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.22% probability · 12th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415, CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1f64f5e903b9d1d157875721e02adadc9d6f0a5dPatch
- https://git.kernel.org/stable/c/447c19f3b5074409c794b350b10306e1da1ef4baPatch
- https://git.kernel.org/stable/c/1f64f5e903b9d1d157875721e02adadc9d6f0a5dPatch
- https://git.kernel.org/stable/c/447c19f3b5074409c794b350b10306e1da1ef4baPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.