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Review reviewHigh

CVE-2026-64026

Linux

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix DATA decrypt vs splice() by copying data to buffer in recvmsg This improves the fix for CVE-2026-43500. Fix the pagecache corruption from in-place decryption of a DATA packet transmitted locally by splice() by getting rid of the packet sharing in the I/O thread and unconditionally extracting the packet content into a bounce buffer in which the buffer is decrypted. recvmsg() (or the kernel equivalent) then copies the data from the bounce buffer to the destination buffer. The sk_buff then remains unmodified. This h...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.20
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix DATA decrypt vs splice() by copying data to buffer in recvmsg This improves the fix for CVE-2026-43500. Fix the pagecache corruption from in-place decryption of a DATA packet transmitted locally by splice() by getting rid of the packet sharing in the I/O thread and unconditionally extracting the packet content into a bounce buffer in which the buffer is decrypted. recvmsg() (or the kernel equivalent) then copies the data from the bounce buffer to the destination buffer. The sk_buff then remains unmodified. This h...

Affected product and versions

Product
Linux
Affected versions
>= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < a05bf6d9e621fa71e89ccebe3047ba45218d7b38, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < b94a6ccbaf1104dd980150a65fdeb2f69d17d2f5, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < 46cb765e2e5ad52303ea157e10d370bb6b7acbbf, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < c580087743712112778a06d65a4074053072d7bf, >= d0d5c0cd1e711c98703f3544c1e6fc1372898de5 < d2bc90cf6c75cb96d2ce549be6c35efa3099d25b, >= 5.3
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:H/A:H
CWE
Not available