201 lines
13 KiB
JSON
201 lines
13 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-2022-49261",
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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": "2025-02-26T01:49:39.296Z",
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"datePublished": "2025-02-26T01:56:13.077Z",
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"dateUpdated": "2026-08-05T08:54:29.551Z"
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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": "2026-08-05T08:54:29.551Z"
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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/i915/gem: add missing boundary check in vm_access\n\nA missing bounds check in vm_access() can lead to an out-of-bounds read\nor write in the adjacent memory area, since the len attribute is not\nvalidated before the memcpy later in the function, potentially hitting:\n\n[ 183.637831] BUG: unable to handle page fault for address: ffffc90000c86000\n[ 183.637934] #PF: supervisor read access in kernel mode\n[ 183.637997] #PF: error_code(0x0000) - not-present page\n[ 183.638059] PGD 100000067 P4D 100000067 PUD 100258067 PMD 106341067 PTE 0\n[ 183.638144] Oops: 0000 [#2] PREEMPT SMP NOPTI\n[ 183.638201] CPU: 3 PID: 1790 Comm: poc Tainted: G D 5.17.0-rc6-ci-drm-11296+ #1\n[ 183.638298] Hardware name: Intel Corporation CoffeeLake Client Platform/CoffeeLake H DDR4 RVP, BIOS CNLSFWR1.R00.X208.B00.1905301319 05/30/2019\n[ 183.638430] RIP: 0010:memcpy_erms+0x6/0x10\n[ 183.640213] RSP: 0018:ffffc90001763d48 EFLAGS: 00010246\n[ 183.641117] RAX: ffff888109c14000 RBX: ffff888111bece40 RCX: 0000000000000ffc\n[ 183.642029] RDX: 0000000000001000 RSI: ffffc90000c86000 RDI: ffff888109c14004\n[ 183.642946] RBP: 0000000000000ffc R08: 800000000000016b R09: 0000000000000000\n[ 183.643848] R10: ffffc90000c85000 R11: 0000000000000048 R12: 0000000000001000\n[ 183.644742] R13: ffff888111bed190 R14: ffff888109c14000 R15: 0000000000001000\n[ 183.645653] FS: 00007fe5ef807540(0000) GS:ffff88845b380000(0000) knlGS:0000000000000000\n[ 183.646570] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 183.647481] CR2: ffffc90000c86000 CR3: 000000010ff02006 CR4: 00000000003706e0\n[ 183.648384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 183.649271] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 183.650142] Call Trace:\n[ 183.650988] <TASK>\n[ 183.651793] vm_access+0x1f0/0x2a0 [i915]\n[ 183.652726] __access_remote_vm+0x224/0x380\n[ 183.653561] mem_rw.isra.0+0xf9/0x190\n[ 183.654402] vfs_read+0x9d/0x1b0\n[ 183.655238] ksys_read+0x63/0xe0\n[ 183.656065] do_syscall_64+0x38/0xc0\n[ 183.656882] entry_SYSCALL_64_after_hwframe+0x44/0xae\n[ 183.657663] RIP: 0033:0x7fe5ef725142\n[ 183.659351] RSP: 002b:00007ffe1e81c7e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\n[ 183.660227] RAX: ffffffffffffffda RBX: 0000557055dfb780 RCX: 00007fe5ef725142\n[ 183.661104] RDX: 0000000000001000 RSI: 00007ffe1e81d880 RDI: 0000000000000005\n[ 183.661972] RBP: 00007ffe1e81e890 R08: 0000000000000030 R09: 0000000000000046\n[ 183.662832] R10: 0000557055dfc2e0 R11: 0000000000000246 R12: 0000557055dfb1c0\n[ 183.663691] R13: 00007ffe1e81e980 R14: 0000000000000000 R15: 0000000000000000\n\nChanges since v1:\n - Updated if condition with range_overflows_t [Chris Wilson]\n\n[mauld: tidy up the commit message and add Cc: stable]\n(cherry picked from commit 661412e301e2ca86799aa4f400d1cf0bd38c57c6)"
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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 - Triggered locally via DRM render ioctls (GEM create/mmap) plus read/write of /proc/self/mem (or ptrace), which reaches vm_ops->access on the VM_PFNMAP i915 VMA; not reachable over the network.\nAC:L - The attacker fully controls object size, mmap offset, and access length; the buggy check only validates addr against obj->base.size, so overflowing with a large len is reliable with no race or external conditions.\nPR:L - An unprivileged user can open the render node and use DRM_RENDER_ALLOW ioctls (I915_GEM_CREATE/MMAP_OFFSET), then access /proc/self/mem because same_thread_group bypasses ptrace checks; no root or init-namespace capability is required.\nUI:N - The attacker performs all steps themselves (create object, mmap, self /proc/pid/mem access) with no action required from another user.\nS:U - Impact is kernel memory corruption and potential privilege escalation within the same host OS security authority; this is not a VM/IOMMU/sandbox boundary escape.\nC:H - The read path does memcpy from vaddr+addr for attacker-chosen len past the GEM mapping, enabling out-of-bounds disclosure of adjacent vmalloc/kernel memory (CWE-125); guidance treats such OOB reads as High.\nI:H - The write path memcpy's attacker-controlled buffer past the object end into adjacent mapped memory (CWE-787), providing a kernel out-of-bounds write primitive usable for further corruption/control-flow hijacking.\nA:H - The PoC demonstrates a kernel oops/page fault in memcpy when the OOB access hits unmapped adjacent addresses, so availability impact is High (crash/DoS)."
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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/i915/gem/i915_gem_mman.c"
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],
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"versions": [
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{
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"version": "9f909e215fea0652023b9ed09d3d7bfe10386423",
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"lessThan": "89ddcc81914ab58cc203acc844f27d55ada8ec0e",
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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": "9f909e215fea0652023b9ed09d3d7bfe10386423",
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"lessThan": "312d3d4f49e12f97260bcf972c848c3562126a18",
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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": "9f909e215fea0652023b9ed09d3d7bfe10386423",
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"lessThan": "5f6e560e3e86ac053447524224e411034f41f5c7",
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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": "9f909e215fea0652023b9ed09d3d7bfe10386423",
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"lessThan": "8f0ebea8f6e8c474264ed97d7a64c9c09ed4f5aa",
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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": "9f909e215fea0652023b9ed09d3d7bfe10386423",
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"lessThan": "3886a86e7e6cc6ce2ce93c440fecd8f42aed0ce7",
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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/i915/gem/i915_gem_mman.c"
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],
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"versions": [
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{
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"version": "5.8",
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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": "5.8",
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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": "5.10.110",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.33",
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"lessThanOrEqual": "5.15.*",
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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": "5.16.19",
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"lessThanOrEqual": "5.16.*",
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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": "5.17.2",
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"lessThanOrEqual": "5.17.*",
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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": "5.18",
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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": "5.8",
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"versionEndExcluding": "5.10.110"
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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": "5.8",
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"versionEndExcluding": "5.17.2"
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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": "5.8",
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"versionEndExcluding": "5.18"
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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/89ddcc81914ab58cc203acc844f27d55ada8ec0e"
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},
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{
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"url": "https://git.kernel.org/stable/c/312d3d4f49e12f97260bcf972c848c3562126a18"
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},
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{
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"url": "https://git.kernel.org/stable/c/5f6e560e3e86ac053447524224e411034f41f5c7"
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},
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{
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"url": "https://git.kernel.org/stable/c/8f0ebea8f6e8c474264ed97d7a64c9c09ed4f5aa"
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},
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{
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"url": "https://git.kernel.org/stable/c/3886a86e7e6cc6ce2ce93c440fecd8f42aed0ce7"
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}
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],
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"title": "drm/i915/gem: add missing boundary check in vm_access",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |