CVE-2026-100080

UNKNOWN 0.0

xen-netback: Fix UAF when reading statistics data

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

In the Linux kernel, the following vulnerability has been resolved: xen-netback: Fix UAF when reading statistics data The network statistic data in the driver is protected by RCU. Unfortunately when tearing down the queues after an error during connecting to the frontend (e.g. due to illegal Xenstore data filled in by the guest), the statistic data is being freed without synchronizing the RCU state. In case the data is being read via sysfs in this phase, access to already freed memory or memory being in new use is possible. Fix that by calling synchronize_net() before freeing the queue data. This is XSA-526 / CVE-2026-100080

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Nov 6, 2026
Last Updated	Nov 6, 2026

Stay Ahead of the Next One

Get instant alerts for linux linux

Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

Linux / Linux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4223b33be49ee09acb6f1d26beb4a36dd3b8d63a 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ab9cdf1291be551da999510b30216a2886074d7a 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 36f858f228e3f955b9336af7f94634747c221518 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 89e534265b62c94749639350200b10370564bb3a 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6cd611d2abdd8623a554e14145f82c1cb4e4467a 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 37d5a73170579b30e67cc8b19ec69715eea3a6b6 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4867687b6ad28ab84bc0811d8f8f9972e769da02 0 < 5.10.274 0 < 5.15.225 0 < 6.1.192 0 < 6.6.162 0 < 6.12.116 0 < 6.18.62 0 < 7.3.3

Linux / Linux

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

git.kernel.org: https://git.kernel.org/stable/c/4223b33be49ee09acb6f1d26beb4a36dd3b8d63a git.kernel.org: https://git.kernel.org/stable/c/ab9cdf1291be551da999510b30216a2886074d7a git.kernel.org: https://git.kernel.org/stable/c/36f858f228e3f955b9336af7f94634747c221518 git.kernel.org: https://git.kernel.org/stable/c/89e534265b62c94749639350200b10370564bb3a git.kernel.org: https://git.kernel.org/stable/c/6cd611d2abdd8623a554e14145f82c1cb4e4467a git.kernel.org: https://git.kernel.org/stable/c/37d5a73170579b30e67cc8b19ec69715eea3a6b6 git.kernel.org: https://git.kernel.org/stable/c/4867687b6ad28ab84bc0811d8f8f9972e769da02 openwall.com: http://www.openwall.com/lists/oss-security/2026/11/06/9 xenbits.xen.org: http://xenbits.xen.org/xsa/advisory-526.html