{"api_version":"1","generated_at":"2026-08-22T17:47:11+00:00","cve":"CVE-2026-74641","urls":{"html":"https://cve.report/CVE-2026-74641","api":"https://cve.report/api/cve/CVE-2026-74641.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74641","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74641"},"summary":{"title":"ALSA: usx2y: bound the hwdep mmap fault offset","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usx2y: bound the hwdep mmap fault offset\n\nsnd_us428ctls_vm_fault() turns the faulting page offset into a kernel\naddress with no bound of any kind:\n\n\toffset = vmf->pgoff << PAGE_SHIFT;\n\tvaddr = (char *)(...)->us428ctls_sharedmem + offset;\n\tpage = virt_to_page(vaddr);\n\tget_page(page);\n\tvmf->page = page;\n\n\treturn 0;\n\nsnd_us428ctls_mmap() checks only the length of the mapping, never the\noffset, and us428ctls_sharedmem is a single page from\nalloc_pages_exact().  For a character device file_mmap_size_max()\nreturns ULONG_MAX, so the mm layer imposes no ceiling either.  Every page\noffset above zero resolves to a struct page outside the object, and the\nhandler installs it into the caller's address space read-write; the vma\nis not marked read-only.\n\nThe caller picks the page frame with a single mmap() argument and gets\nread-write access to a page of kernel memory it does not own; an offset\nthat lands in an unpopulated vmemmap region oopses instead.\n\nA process that can open the hwdep node of an attached US-X2Y reaches\nthis after loading the FPGA image through the same node; no capability\ncheck is involved.\n\nOn 7.2.0-rc5 (arm64), mmap() with a large offset:\n\n  Unable to handle kernel paging request at virtual address fffffdffc45d5ac8\n  pc : snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y]\n  Call trace:\n   snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y]\n   __do_fault\n   __handle_mm_fault\n   handle_mm_fault\n   el0_da\n\nReject any offset outside the shared region.  The pcm hwdep handler in\nusx2yhwdeppcm.c computes its address the same way and needs the same\nbound.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:37","updated_at":"2026-08-22 16:16:37"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/2ca1eea3cd17930daffe9e429a7c89232036ec24","name":"https://git.kernel.org/stable/c/2ca1eea3cd17930daffe9e429a7c89232036ec24","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/10a87401fb3148c388e55df0148295b3b137da07","name":"https://git.kernel.org/stable/c/10a87401fb3148c388e55df0148295b3b137da07","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f613b4a2d87247b51a1b2b330f2e083a454125f2","name":"https://git.kernel.org/stable/c/f613b4a2d87247b51a1b2b330f2e083a454125f2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5bf5ccddf00b59f1e3ea7e65d76a5f5b5c21cc2e","name":"https://git.kernel.org/stable/c/5bf5ccddf00b59f1e3ea7e65d76a5f5b5c21cc2e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f75d6f61f0d9c5c1ea725104014e10d26d1e3a00","name":"https://git.kernel.org/stable/c/f75d6f61f0d9c5c1ea725104014e10d26d1e3a00","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4208db2453e1ea71b8048a5b7802360cb29a53f1","name":"https://git.kernel.org/stable/c/4208db2453e1ea71b8048a5b7802360cb29a53f1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/34ab56ed854baa73a731cfd99af689f0b1bac444","name":"https://git.kernel.org/stable/c/34ab56ed854baa73a731cfd99af689f0b1bac444","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74641","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74641","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 10a87401fb3148c388e55df0148295b3b137da07 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 34ab56ed854baa73a731cfd99af689f0b1bac444 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 4208db2453e1ea71b8048a5b7802360cb29a53f1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 f613b4a2d87247b51a1b2b330f2e083a454125f2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 f75d6f61f0d9c5c1ea725104014e10d26d1e3a00 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 5bf5ccddf00b59f1e3ea7e65d76a5f5b5c21cc2e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2ca1eea3cd17930daffe9e429a7c89232036ec24 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["sound/usb/usx2y/usX2Yhwdep.c","sound/usb/usx2y/usx2yhwdeppcm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"10a87401fb3148c388e55df0148295b3b137da07","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"34ab56ed854baa73a731cfd99af689f0b1bac444","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"4208db2453e1ea71b8048a5b7802360cb29a53f1","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"f613b4a2d87247b51a1b2b330f2e083a454125f2","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"f75d6f61f0d9c5c1ea725104014e10d26d1e3a00","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"5bf5ccddf00b59f1e3ea7e65d76a5f5b5c21cc2e","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"2ca1eea3cd17930daffe9e429a7c89232036ec24","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["sound/usb/usx2y/usX2Yhwdep.c","sound/usb/usx2y/usx2yhwdeppcm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usx2y: bound the hwdep mmap fault offset\n\nsnd_us428ctls_vm_fault() turns the faulting page offset into a kernel\naddress with no bound of any kind:\n\n\toffset = vmf->pgoff << PAGE_SHIFT;\n\tvaddr = (char *)(...)->us428ctls_sharedmem + offset;\n\tpage = virt_to_page(vaddr);\n\tget_page(page);\n\tvmf->page = page;\n\n\treturn 0;\n\nsnd_us428ctls_mmap() checks only the length of the mapping, never the\noffset, and us428ctls_sharedmem is a single page from\nalloc_pages_exact().  For a character device file_mmap_size_max()\nreturns ULONG_MAX, so the mm layer imposes no ceiling either.  Every page\noffset above zero resolves to a struct page outside the object, and the\nhandler installs it into the caller's address space read-write; the vma\nis not marked read-only.\n\nThe caller picks the page frame with a single mmap() argument and gets\nread-write access to a page of kernel memory it does not own; an offset\nthat lands in an unpopulated vmemmap region oopses instead.\n\nA process that can open the hwdep node of an attached US-X2Y reaches\nthis after loading the FPGA image through the same node; no capability\ncheck is involved.\n\nOn 7.2.0-rc5 (arm64), mmap() with a large offset:\n\n  Unable to handle kernel paging request at virtual address fffffdffc45d5ac8\n  pc : snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y]\n  Call trace:\n   snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y]\n   __do_fault\n   __handle_mm_fault\n   handle_mm_fault\n   el0_da\n\nReject any offset outside the shared region.  The pcm hwdep handler in\nusx2yhwdeppcm.c computes its address the same way and needs the same\nbound.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>"}],"providerMetadata":{"dateUpdated":"2026-08-22T15:32:19.696Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/10a87401fb3148c388e55df0148295b3b137da07"},{"url":"https://git.kernel.org/stable/c/34ab56ed854baa73a731cfd99af689f0b1bac444"},{"url":"https://git.kernel.org/stable/c/4208db2453e1ea71b8048a5b7802360cb29a53f1"},{"url":"https://git.kernel.org/stable/c/f613b4a2d87247b51a1b2b330f2e083a454125f2"},{"url":"https://git.kernel.org/stable/c/f75d6f61f0d9c5c1ea725104014e10d26d1e3a00"},{"url":"https://git.kernel.org/stable/c/5bf5ccddf00b59f1e3ea7e65d76a5f5b5c21cc2e"},{"url":"https://git.kernel.org/stable/c/2ca1eea3cd17930daffe9e429a7c89232036ec24"}],"title":"ALSA: usx2y: bound the hwdep mmap fault offset","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74641","datePublished":"2026-08-22T15:32:19.696Z","dateReserved":"2026-08-15T05:44:03.922Z","dateUpdated":"2026-08-22T15:32:19.696Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:37","lastModifiedDate":"2026-08-22 16:16:37","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74641","Ordinal":"1","Title":"ALSA: usx2y: bound the hwdep mmap fault offset","CVE":"CVE-2026-74641","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74641","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usx2y: bound the hwdep mmap fault offset\n\nsnd_us428ctls_vm_fault() turns the faulting page offset into a kernel\naddress with no bound of any kind:\n\n\toffset = vmf->pgoff << PAGE_SHIFT;\n\tvaddr = (char *)(...)->us428ctls_sharedmem + offset;\n\tpage = virt_to_page(vaddr);\n\tget_page(page);\n\tvmf->page = page;\n\n\treturn 0;\n\nsnd_us428ctls_mmap() checks only the length of the mapping, never the\noffset, and us428ctls_sharedmem is a single page from\nalloc_pages_exact().  For a character device file_mmap_size_max()\nreturns ULONG_MAX, so the mm layer imposes no ceiling either.  Every page\noffset above zero resolves to a struct page outside the object, and the\nhandler installs it into the caller's address space read-write; the vma\nis not marked read-only.\n\nThe caller picks the page frame with a single mmap() argument and gets\nread-write access to a page of kernel memory it does not own; an offset\nthat lands in an unpopulated vmemmap region oopses instead.\n\nA process that can open the hwdep node of an attached US-X2Y reaches\nthis after loading the FPGA image through the same node; no capability\ncheck is involved.\n\nOn 7.2.0-rc5 (arm64), mmap() with a large offset:\n\n  Unable to handle kernel paging request at virtual address fffffdffc45d5ac8\n  pc : snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y]\n  Call trace:\n   snd_us428ctls_vm_fault+0x68/0x140 [snd_usb_usx2y]\n   __do_fault\n   __handle_mm_fault\n   handle_mm_fault\n   el0_da\n\nReject any offset outside the shared region.  The pcm hwdep handler in\nusx2yhwdeppcm.c computes its address the same way and needs the same\nbound.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>","Type":"Description","Title":"ALSA: usx2y: bound the hwdep mmap fault offset"}]}}}