CVE-2026-99287
xen-netback: Zero out sring pointers on unmap
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: xen-netback: Zero out sring pointers on unmap If xenvif_map_frontend_data_rings() fails when a ring is already mapped, it unmaps them via xenvif_unmap_frontend_data_rings() which keeps the ring pointers unchanged. xenvif_connect_data()'s cleanup path calls xenvif_disconnect_queue() which in turn calls xenvif_unmap_frontend_data_rings() again, which will attempt to unmap the pointers a second time. Zero out the ring pointers after they are unmapped to avoid this issue. This is XSA-532
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 10, 2026 |
| Last Updated | Nov 10, 2026 |
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Affected Versions
Linux / Linux
2ac061ce97f413bfbbdd768f7d2e0fda2e8170df < 87fd475dc4e354088f6534285388e7b061f54b35 2ac061ce97f413bfbbdd768f7d2e0fda2e8170df < c5f54af611ff6fe1d53fa05d8e87b469dc56122b 2ac061ce97f413bfbbdd768f7d2e0fda2e8170df < e7ba61734d6ad6adfd5bf617052e590743211669
Linux / Linux
5.5
References
git.kernel.org: https://git.kernel.org/stable/c/87fd475dc4e354088f6534285388e7b061f54b35 git.kernel.org: https://git.kernel.org/stable/c/c5f54af611ff6fe1d53fa05d8e87b469dc56122b git.kernel.org: https://git.kernel.org/stable/c/e7ba61734d6ad6adfd5bf617052e590743211669 openwall.com: http://www.openwall.com/lists/oss-security/2026/11/10/26 xenbits.xen.org: http://xenbits.xen.org/xsa/advisory-532.html