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Review reviewHigh

CVE-2026-64496

Linux

In the Linux kernel, the following vulnerability has been resolved: iio: event: Fix event FIFO reset race `iio_event_getfd()` creates the event file descriptor with `anon_inode_getfd()`, which allocates a new fd, creates the anonymous file and installs it in the process fd table before returning to the caller. The IIO code resets the event FIFO after `anon_inode_getfd()` has returned, but before `IIO_GET_EVENT_FD_IOCTL` has copied the fd number to userspace. But since fd tables are shared between threads, another thread can guess the newly allocated fd number and issue a `read()` on it as s...

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: iio: event: Fix event FIFO reset race `iio_event_getfd()` creates the event file descriptor with `anon_inode_getfd()`, which allocates a new fd, creates the anonymous file and installs it in the process fd table before returning to the caller. The IIO code resets the event FIFO after `anon_inode_getfd()` has returned, but before `IIO_GET_EVENT_FD_IOCTL` has copied the fd number to userspace. But since fd tables are shared between threads, another thread can guess the newly allocated fd number and issue a `read()` on it as s...

Affected product and versions

Product
Linux
Affected versions
>= b91accafbb1031b80d22ad83576877ff2f8b4774 < 9dc84ba4be5bbeb29ee49efe6cea2cb32c461424, >= b91accafbb1031b80d22ad83576877ff2f8b4774 < d16a702ca7d29c0b7a9b509339d1b044a1cadb32, >= b91accafbb1031b80d22ad83576877ff2f8b4774 < a13ef1adbc62085b21b546b07b0be7e2fbf52150, >= b91accafbb1031b80d22ad83576877ff2f8b4774 < 0d4a646d7f87ea3625fafe387043fddc6a2f5e7f, >= b91accafbb1031b80d22ad83576877ff2f8b4774 < 72c6aa8e0d74eab91b8694cde97dec088c248fee, >= b91accafbb1031b80d22ad83576877ff2f8b4774 < 9edefd4c56bee3fe331e0355d1f10a533134999d, >= b91accafbb1031b80d22ad83576877ff2f8b4774 < f187dc5a4c4846ffa07d9bda6e760837ed005574, >= b91accafbb1031b80d22ad83576877ff2f8b4774 < af791d295737ea6b6ff2c8d8488462a49c14af01, >= 3.15
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
Not available