CVE-2026-98900None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: xen/gntalloc: validate grant count before allocation gntalloc_ioctl_alloc() allocates the grant-id array before checking whether the requested count fits within the gl…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 25.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
In the Linux kernel, the following vulnerability has been resolved:
xen/gntalloc: validate grant count before allocation
gntalloc_ioctl_alloc() allocates the grant-id array before checking whether the requested count fits within the global grant limit. Counts above that limit cannot succeed, so reject them before the user-controlled allocation reaches kcalloc().
Use a subtraction-based check while holding gref_mutex so adding the requested count cannot wrap. Also cast the count before advancing the per-file index so the page-size multiplication is performed in 64-bit arithmetic.
Linux >= dd3140588d9551235ebc2a0dacdca098e7677573 < e2806390aa1c4d5b3f7a68f10a56ae12c71c00d8Linux >= dd3140588d9551235ebc2a0dacdca098e7677573 < 71a0cf87e19fb35c4292ca88985e376e613c900aLinux >= dd3140588d9551235ebc2a0dacdca098e7677573 < 641de086a05f349de7fc548612432bc2fed721caLinux >= dd3140588d9551235ebc2a0dacdca098e7677573 < 720554c04acba80018ded069d3e0984bebaee891Linux >= dd3140588d9551235ebc2a0dacdca098e7677573 < 84d5727cef8eb9c8a28210ad248f1c70b223b065Linux >= dd3140588d9551235ebc2a0dacdca098e7677573 < 231542f4e43cf9837cb520664545e85fbe666b7bLinux >= dd3140588d9551235ebc2a0dacdca098e7677573 < 2299822f3f466b5dcad2377bf63986199f881a6bLinux 2.6.39Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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