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7.8 High

CVE-2026-46323 In the Linux kernel, the following vulnerability has been resolved: net: gro: don't merge zcopy skbs skb_gro_receive()…

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.

Affected products and versions

Product Affected versions Fixed in
Linux 7.1 earliest → < 7.1 7.1
Linux 7.0 earliest → < 7.0.11 7.0.11
Linux 6.18 earliest → < 6.18.34 6.18.34
Linux 6.12 earliest → < 6.12.92 6.12.92
Linux 6.6 earliest → < 6.6.142 6.6.142
Linux 6.1 earliest → < 6.1.176 6.1.176
Linux 6.0 No fix stated
Red Hat Enterprise Linux AppStream EUS (v. 10.0) Versions not published
Red Hat Enterprise Linux AppStream E4S (v.9.4) Versions not published
Show the 36 other branches
Product Affected versions Fixed in
Red Hat Enterprise Linux AppStream EUS (v.9.6) Versions not published
Red Hat Enterprise Linux BaseOS EUS (v. 10.0) Versions not published
Red Hat Enterprise Linux BaseOS E4S (v.9.4) Versions not published
Red Hat Enterprise Linux BaseOS EUS (v.9.6) Versions not published
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) Versions not published
Red Hat CodeReady Linux Builder EUS (v.9.6) Versions not published
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) Versions not published
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) Versions not published
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) Versions not published
Red Hat Enterprise Linux Real Time EUS (v. 10.0) Versions not published
Red Hat Enterprise Linux Real Time E4S (v.9.4) Versions not published
Red Hat Enterprise Linux Real Time EUS (v.9.6) Versions not published
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat Enterprise Linux for NVIDIA 26 Versions not published
Red Hat OpenShift Container Platform 4 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux AppStream (v. 9) Versions not published
Red Hat Enterprise Linux BaseOS (v. 9) Versions not published
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) Versions not published
Red Hat Enterprise Linux Real Time for NFV (v. 9) Versions not published
Red Hat Enterprise Linux Real Time (v. 9) Versions not published
Red Hat Enterprise Linux 10.0 Extended Update Support Versions not published
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.6 Extended Update Support Versions not published
Red Hat OpenShift Container Platform 4.20 4.20 earliest → < 4.20.9.6.202607221038-0 4.20.9.6.202607221038-0
Red Hat OpenShift Container Platform 4.21 4.21 earliest → < 4.21.9.6.202607221317-0 4.21.9.6.202607221317-0
Red Hat OpenShift Container Platform 4.18 418.94 earliest → < 418.94.202607211754-0 418.94.202607211754-0
Red Hat OpenShift Container Platform 4.19 4.19 earliest → < 4.19.9.6.202607220857-0 4.19.9.6.202607220857-0
Red Hat OpenShift Container Platform 4.17 417.94 earliest → < 417.94.202607240132-0 417.94.202607240132-0
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Versions not published

References

Timeline

  1. Published
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