What is CVE-2026-46323?

CVE-2026-46323 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.0 onward and patched in 6.6.142, 6.12.92, 6.18.34 and others. CVE-2026-46323 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46323?

CVE-2026-46323 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-46323?

Yes, CVE-2026-46323 has been patched. Fixed versions include 6.6.142, 6.12.92, 6.18.34 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46323 actively exploited?

CVE-2026-46323 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46323

In the Linux kernel, the following vulnerability has been resolved: net: gro: don't merge zcopy skbs skb_gro_receive() can currently copy frags between the source and GRO skb, without checking the zerocopy status, and in particular the SKBFL_MANAGED_FRAG_REFS flag. When SKBFL_MANAGED_FRAG_REFS is set, the skb doesn't hold a reference on the pages in shinfo->frags. Appending those frags to another skb's frags without fixing up the page refcount can lead to UAF. When either the last skb in the GRO chain (the one we would append frags to) or the source skb is zerocopy, don't merge the skbs.

Package Linux Kernel

Published 2026-06-09

Last modified 2026-06-09

Patch available

Yes

Affected versions

Linux kernel versions 6.0 and later are affected. Fixed in 6.6.142, 6.12.92, 6.18.34, 7.0.11, 7.1-rc5 and their respective stable series.

Affected from

≥ 6.0

Fixed in

✓ 6.6.142 6.6.x ✓ 6.12.92 6.12.x ✓ 6.18.34 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1-rc5

References

The following references provide additional information about CVE-2026-46323 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/1f9c828556416fbe3f49386708ce999fc4d4da06
Patch
Kernel patch commit
https://git.kernel.org/stable/c/44bea2032af0425e4ce6d26a8af0ede79db49ec1
Patch
Kernel patch commit
https://git.kernel.org/stable/c/479084ae0e1d9cb7929cb4298d35623de189f80a
Patch

5 patch commits total View all on NVD

Frequently asked questions

What is CVE-2026-46323?

CVE-2026-46323 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.0 onward and has been patched in 6.6.142, 6.12.92, 6.18.34 and others. CVE-2026-46323 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-46323?

Yes — CVE-2026-46323 has been patched. Fixed versions include 6.6.142, 6.12.92, 6.18.34 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46323 actively exploited?

No — CVE-2026-46323 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.