CVE-2026-98900
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
xen/gntalloc: validate grant count before allocation
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | affected | git | e2806390aa1c4d5b3f7a68f10a56ae12c71c00d8 | Unavailable | None listed |
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | affected | git | 71a0cf87e19fb35c4292ca88985e376e613c900a | Unavailable | None listed |
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | affected | git | 641de086a05f349de7fc548612432bc2fed721ca | Unavailable | None listed |
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | affected | git | 720554c04acba80018ded069d3e0984bebaee891 | Unavailable | None listed |
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | affected | git | 84d5727cef8eb9c8a28210ad248f1c70b223b065 | Unavailable | None listed |
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | affected | git | 231542f4e43cf9837cb520664545e85fbe666b7b | Unavailable | None listed |
| 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 | affected | git | 2299822f3f466b5dcad2377bf63986199f881a6b | Unavailable | None listed |
| 0 | affected | semver | 5.10.271 | Unavailable | None listed |
| 0 | affected | semver | 5.15.222 | Unavailable | None listed |
| 0 | affected | semver | 6.1.189 | Unavailable | None listed |
| 0 | affected | semver | 6.6.158 | Unavailable | None listed |
| 0 | affected | semver | 6.12.111 | Unavailable | None listed |
| 0 | affected | semver | 6.18.53 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.10.271 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.222 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.189 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.111 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.53 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |