ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-74631

net: smc: fix splice entry lifetime imbalance in smc_rx_splice

Published Aug 22, 2026 · catalog updated Oct 14, 2026 · net: smc: fix splice

Check if you run it

No confirmed exploitation is on record for CVE-2026-74631. EPSS is 0.14%. Act only if a listed version of net: smc: fix splice is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (net: smc: fix splice).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.14%
Remediation
Not established
Affected products
Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover the lifetime of each splice entry. In the VM-backed RMB path, splice_to_pipe() may drop unqueued entries through smc_rx_spd_release(), while queued entries are released later via the pipe buffer callback. The old post-splice accounting also derives the number of queued VM pages from an offset mutated while building the descriptor, and a multi-page splice pairs one sock_hold() with multiple sock_put() calls. Take the page and socket references for every candidate entry before splice_to_pipe(), and drop the matching private state, page reference, and socket reference from smc_rx_spd_release() for entries that never get queued. This fixes a refcount imbalance that can underflow page refcounts and trigger a use-after-free.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Linux Kernel4.18.0 → 5.10.266

How to fix CVE-2026-74631

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-74631. EPSS is 0.14%. Act only if a listed version of net: smc: fix splice is installed.

Which versions are affected?

Compare what you have installed with Kernel 4.18.0 → 5.10.266. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.14%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 22, 2026 · NIST NVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover the lifetime of each splice entry. In the VM-backed RMB path, splice_to_pipe() may drop unqueued entries through smc_rx_spd_release(), while queued entries are released later via t

  2. Oct 14, 2026 · NIST NVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover the lifetime of each splice entry. In the VM-backed RMB path, splice_to_pipe() may drop unqueued entries through smc_rx_spd_release(), while queued entries are released later via t

  3. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 5.10.266

  4. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 5.10.266

  5. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover the lifetime of each splice entry. In the VM-backed RMB path, splice_to_pipe() may drop unqueued entries through smc_rx_spd_release(), while queued entries are released later via t

Sources

  • CVE.orgVulnerability recordCVE-2026-74631

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-74631

    30-day exploitation probability 0.1%

    first.org
  • NIST NVDVulnerability recordCVE-2026-74631

    In the Linux kernel, the following vulnerability has been resolved: net: smc: fix splice entry lifetime imbalance in smc_rx_splice smc_rx_splice() passes pages to splice_to_pipe() before taking the references that cover the lifetime of each splice entry. In the VM-backed RMB pa

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryCVE-2026-74631

    net: smc: fix splice entry lifetime imbalance in smc_rx_splice

    osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.