138 lines
7.7 KiB
JSON
138 lines
7.7 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-39740",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-04-16T07:20:57.120Z",
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"datePublished": "2025-09-11T16:52:14.638Z",
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"dateUpdated": "2026-08-05T12:04:57.846Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:04:57.846Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/migrate: prevent potential UAF\n\nIf we hit the error path, the previous fence (if there is one) has\nalready been put() prior to this, so doing a fence_wait could lead to\nUAF. Tweak the flow to do to the put() until after we do the wait.\n\n(cherry picked from commit 9b7ca35ed28fe5fad86e9d9c24ebd1271e4c9c3e)"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable loop is reached only through a local userspace mapping of an Intel Xe VRAM buffer object accessed via ptrace//proc/pid/mem/process_vm_readv, or via the local devcoredump snapshot path after a GPU hang. There is no network or adjacent-network exposure.\nAC:L - The attacker deterministically forces multiple loop iterations by choosing the access offset/length against a fragmented VRAM BO (or a large VM snapshot), and forces the error path by saturating the fixed-size kernel_bb_pool and signalling the waiting thread, since drm_suballoc_insert waits interruptibly and returns -ERESTARTSYS. Concurrent migrate traffic that replaces m->fence and drops the last reference is likewise generated by the attacker's own GPU submissions.\nPR:L - Only an unprivileged local user with DRM render-node access (render group, logged-in desktop user, or Android graphics group) is needed to create and mmap a VRAM BO and ptrace its own process. No root, capability, or namespace escalation is required.\nUI:N - The attacker performs the BO creation, mapping, GPU load generation, and the triggering remote-memory access entirely within its own processes. No action by any other user is required.\nS:U - The freed dma_fence and any resulting corruption stay within the host kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - dma_fence_wait() on the freed fence dereferences fence->ops, fence->lock and fence->seqno from reclaimed slab memory, and the attacker can refill that slot with objects of its choosing by submitting more scheduler jobs, yielding an arbitrary kernel-memory read primitive.\nI:H - The same wait path writes into the freed object (list_add on cb_list, setting the ENABLE_SIGNAL flag) and performs an indirect call through fence->ops, so a heap-sprayed replacement gives both a write primitive and control-flow hijack leading to privilege escalation.\nA:H - Even without successful exploitation the use-after-free reliably produces a KASAN splat/oops, and waiting on a fence that will never signal hangs the calling task while holding the BO reservation, denying service."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/xe/xe_migrate.c"
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],
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"versions": [
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{
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"version": "270172f64b114451876c1b68912653e72ab99f38",
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"lessThan": "7e46fa64a4b94208563c3a5bf1d7f4346f94abea",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "270172f64b114451876c1b68912653e72ab99f38",
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"lessThan": "145832fbdd17b1d77ffd6cdd1642259e101d1b7e",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/xe/xe_migrate.c"
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],
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"versions": [
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{
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"version": "6.16",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.16",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.16.2",
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"lessThanOrEqual": "6.16.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.17",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.16.2"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.17"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7e46fa64a4b94208563c3a5bf1d7f4346f94abea"
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},
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{
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"url": "https://git.kernel.org/stable/c/145832fbdd17b1d77ffd6cdd1642259e101d1b7e"
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}
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],
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"title": "drm/xe/migrate: prevent potential UAF",
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"x_generator": {
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