Answer in brief
CVE-2025-38595 records a High severity (CVSS 7.8) vulnerability in xen: fix UAF in dmabuf_exp_from_pages(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <e5907885260401bba300d4d18d79875c05b82651 || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <3edfd2353f301bfffd5ee41066e37320a59ccc2d || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <d59d49af4aeed9a81e673e37c26c6a3bacf1a181 || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <532c8b51b3a8676cbf533a291f8156774f30ea87 | e5907885260401bba300d4d18d79875c05b82651, 3edfd2353f301bfffd5ee41066e37320a59ccc2d, d59d49af4aeed9a81e673e37c26c6a3bacf1a181, 532c8b51b3a8676cbf533a291f8156774f30ea87 |
| Linux/Linuxgeneric | 4.19 | Not reported |
| Linux/Linuxgeneric | >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <ba8bc644f168509c16d48444991de7cfea3f12ec || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <e5907885260401bba300d4d18d79875c05b82651 || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <3edfd2353f301bfffd5ee41066e37320a59ccc2d || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <d59d49af4aeed9a81e673e37c26c6a3bacf1a181 || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <532c8b51b3a8676cbf533a291f8156774f30ea87 | ba8bc644f168509c16d48444991de7cfea3f12ec, e5907885260401bba300d4d18d79875c05b82651, 3edfd2353f301bfffd5ee41066e37320a59ccc2d, d59d49af4aeed9a81e673e37c26c6a3bacf1a181, 532c8b51b3a8676cbf533a291f8156774f30ea87 |
| Linux/Linuxgeneric | >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <2be49867e68abbeb52d7f5d15eb1216154e2c0a0 || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <ba8bc644f168509c16d48444991de7cfea3f12ec || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <e5907885260401bba300d4d18d79875c05b82651 || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <3edfd2353f301bfffd5ee41066e37320a59ccc2d || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <d59d49af4aeed9a81e673e37c26c6a3bacf1a181 || >=a240d6e42e28c34fdc34b3a98ca838a31c939901 <532c8b51b3a8676cbf533a291f8156774f30ea87 | 2be49867e68abbeb52d7f5d15eb1216154e2c0a0, ba8bc644f168509c16d48444991de7cfea3f12ec, e5907885260401bba300d4d18d79875c05b82651, 3edfd2353f301bfffd5ee41066e37320a59ccc2d, d59d49af4aeed9a81e673e37c26c6a3bacf1a181, 532c8b51b3a8676cbf533a291f8156774f30ea87 |
Published upstream
Aug 19, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: xen: fix UAF in dmabuf_exp_from_pages() [dma_buf_fd() fixes; no preferences regarding the tree it goes through - up to xen folks] As soon as we'd inserted a file reference into descriptor table, another thread could close it. That's fine for the case when all we are doing is returning that descriptor to userland (it's a race, but it's a userland race and there's nothing the kernel can do about it). However, if we follow fd_install() with any kind of access to objects that would be destroyed on close (be it the struct file itself or anything destroyed by its ->release()), we have a UAF. dma_buf_fd() is a combination of reserving a descriptor and fd_install(). gntdev dmabuf_exp_from_pages() calls it and then proceeds to access the objects destroyed on close - starting with gntdev_dmabuf itself. Fix that by doing reserving descriptor before anything else and do fd_install() only when everything had been set up.
Quoted source text, attributed separately from HOL analysis.