DEBIAN-CVE-2026-46323

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2026-46323
Published: 09 Jun 2026, 13:16
Last modified:05 Jul 2026, 20:00

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

09 Jun 2026, 13:16
Published
Vulnerability first disclosed
05 Jul 2026, 20:00
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Systems

  • debian•linux

    all | all | all | < 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

  • debian•linux-6.1

    < 6.1.176-1~deb11u1

References (1)