{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49261", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.296Z", "datePublished": "2025-02-26T01:56:13.077Z", "dateUpdated": "2026-08-05T08:54:29.551Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:29.551Z" }, "descriptions": [ { "lang": "en", "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] \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)" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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)." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/i915/gem/i915_gem_mman.c" ], "versions": [ { "version": "9f909e215fea0652023b9ed09d3d7bfe10386423", "lessThan": "89ddcc81914ab58cc203acc844f27d55ada8ec0e", "status": "affected", "versionType": "git" }, { "version": "9f909e215fea0652023b9ed09d3d7bfe10386423", "lessThan": "312d3d4f49e12f97260bcf972c848c3562126a18", "status": "affected", "versionType": "git" }, { "version": "9f909e215fea0652023b9ed09d3d7bfe10386423", "lessThan": "5f6e560e3e86ac053447524224e411034f41f5c7", "status": "affected", "versionType": "git" }, { "version": "9f909e215fea0652023b9ed09d3d7bfe10386423", "lessThan": "8f0ebea8f6e8c474264ed97d7a64c9c09ed4f5aa", "status": "affected", "versionType": "git" }, { "version": "9f909e215fea0652023b9ed09d3d7bfe10386423", "lessThan": "3886a86e7e6cc6ce2ce93c440fecd8f42aed0ce7", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/i915/gem/i915_gem_mman.c" ], "versions": [ { "version": "5.8", "status": "affected" }, { "version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.110", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.33", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.19", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.2", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.10.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.16.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.17.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/89ddcc81914ab58cc203acc844f27d55ada8ec0e" }, { "url": "https://git.kernel.org/stable/c/312d3d4f49e12f97260bcf972c848c3562126a18" }, { "url": "https://git.kernel.org/stable/c/5f6e560e3e86ac053447524224e411034f41f5c7" }, { "url": "https://git.kernel.org/stable/c/8f0ebea8f6e8c474264ed97d7a64c9c09ed4f5aa" }, { "url": "https://git.kernel.org/stable/c/3886a86e7e6cc6ce2ce93c440fecd8f42aed0ce7" } ], "title": "drm/i915/gem: add missing boundary check in vm_access", "x_generator": { "engine": "bippy-1.2.0" } } } }