What’s Vulnerable › Vulnerabilities

CVE-2026-68474: powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access() spufs_mem_mmap_access() computes the local store offset as address - vma->vm_start, but bounds-checks it against vma->vm_end instead of the local store size. On 64-bit, offset is always well below vma->vm_end, so the clamp never fires and len stays unbounded against the LS_SIZE buffer returned by ctx->ops->get_ls(). Reject offsets at or beyond LS_SIZE and clamp len to the remaining space, mirroring the guard already used by spufs_mem_mmap_fault() and spufs_ps_fault().

Affected products

• Linux kernel: 2.6.27 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3c1e92f75e11a11492b8cb901fceeb9f16ae6415
• https://git.kernel.org/stable/c/47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6
• https://git.kernel.org/stable/c/4efa313b15925bdd864784865d6585174979294b
• https://git.kernel.org/stable/c/913feef74354c653f10ecd4631df7618a95c49c2
• https://git.kernel.org/stable/c/9d3569bfdceda69d5ffd5148901e57b69954d9ef
• https://git.kernel.org/stable/c/aa7aa8ba40c089762d821e3987aaae19e1f5705c
• https://git.kernel.org/stable/c/d479a7711f8ff127946467b910d947bd971b94ed
• https://git.kernel.org/stable/c/d97a8f3668949a8a9d1f6202f8c53446f2d89aa7

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