{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-49740", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49740", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-03-27T16:42:52.222Z", "updatedAt": "2026-05-11T19:05:50.080Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "wifi: brcmfmac: Check the count value of channel spec to prevent out-of-bounds reads", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmfmac: Check the count value of channel spec to prevent out-of-bounds reads\n\nThis patch fixes slab-out-of-bounds reads in brcmfmac that occur in\nbrcmf_construct_chaninfo() and brcmf_enable_bw40_2g() when the count\nvalue of channel specifications provided by the device is greater than\nthe length of 'list->element[]', decided by the size of the 'list'\nallocated with kzalloc(). The patch adds checks that make the functions\nfree the buffer and return -EINVAL if that is the case. Note that the\nnegative return is handled by the caller, brcmf_setup_wiphybands() or\nbrcmf_cfg80211_attach().\n\nFound by a modified version of syzkaller.\n\nCrash Report from brcmf_construct_chaninfo():\n==================================================================\nBUG: KASAN: slab-out-of-bounds in brcmf_setup_wiphybands+0x1238/0x1430\nRead of size 4 at addr ffff888115f24600 by task kworker/0:2/1896\n\nCPU: 0 PID: 1896 Comm: kworker/0:2 Tainted: G W O 5.14.0+ #132\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014\nWorkqueue: usb_hub_wq hub_event\nCall Trace:\n dump_stack_lvl+0x57/0x7d\n print_address_description.constprop.0.cold+0x93/0x334\n kasan_report.cold+0x83/0xdf\n brcmf_setup_wiphybands+0x1238/0x1430\n brcmf_cfg80211_attach+0x2118/0x3fd0\n brcmf_attach+0x389/0xd40\n brcmf_usb_probe+0x12de/0x1690\n usb_probe_interface+0x25f/0x710\n really_probe+0x1be/0xa90\n __driver_probe_device+0x2ab/0x460\n driver_probe_device+0x49/0x120\n __device_attach_driver+0x18a/0x250\n bus_for_each_drv+0x123/0x1a0\n __device_attach+0x207/0x330\n bus_probe_device+0x1a2/0x260\n device_add+0xa61/0x1ce0\n usb_set_configuration+0x984/0x1770\n usb_generic_driver_probe+0x69/0x90\n usb_probe_device+0x9c/0x220\n really_probe+0x1be/0xa90\n __driver_probe_device+0x2ab/0x460\n driver_probe_device+0x49/0x120\n __device_attach_driver+0x18a/0x250\n bus_for_each_drv+0x123/0x1a0\n __device_attach+0x207/0x330\n bus_probe_device+0x1a2/0x260\n device_add+0xa61/0x1ce0\n usb_new_device.cold+0x463/0xf66\n hub_event+0x10d5/0x3330\n process_one_work+0x873/0x13e0\n worker_thread+0x8b/0xd10\n kthread+0x379/0x450\n ret_from_fork+0x1f/0x30\n\nAllocated by task 1896:\n kasan_save_stack+0x1b/0x40\n __kasan_kmalloc+0x7c/0x90\n kmem_cache_alloc_trace+0x19e/0x330\n brcmf_setup_wiphybands+0x290/0x1430\n brcmf_cfg80211_attach+0x2118/0x3fd0\n brcmf_attach+0x389/0xd40\n brcmf_usb_probe+0x12de/0x1690\n usb_probe_interface+0x25f/0x710\n really_probe+0x1be/0xa90\n __driver_probe_device+0x2ab/0x460\n driver_probe_device+0x49/0x120\n __device_attach_driver+0x18a/0x250\n bus_for_each_drv+0x123/0x1a0\n __device_attach+0x207/0x330\n bus_probe_device+0x1a2/0x260\n device_add+0xa61/0x1ce0\n usb_set_configuration+0x984/0x1770\n usb_generic_driver_probe+0x69/0x90\n usb_probe_device+0x9c/0x220\n really_probe+0x1be/0xa90\n __driver_probe_device+0x2ab/0x460\n driver_probe_device+0x49/0x120\n __device_attach_driver+0x18a/0x250\n bus_for_each_drv+0x123/0x1a0\n __device_attach+0x207/0x330\n bus_probe_device+0x1a2/0x260\n device_add+0xa61/0x1ce0\n usb_new_device.cold+0x463/0xf66\n hub_event+0x10d5/0x3330\n process_one_work+0x873/0x13e0\n worker_thread+0x8b/0xd10\n kthread+0x379/0x450\n ret_from_fork+0x1f/0x30\n\nThe buggy address belongs to the object at ffff888115f24000\n which belongs to the cache kmalloc-2k of size 2048\nThe buggy address is located 1536 bytes inside of\n 2048-byte region [ffff888115f24000, ffff888115f24800)\n\nMemory state around the buggy address:\n ffff888115f24500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff888115f24580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n>ffff888115f24600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ^\n ffff888115f24680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n ffff888115f24700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n==================================================================\n\nCrash Report from brcmf_enable_bw40_2g():\n==========\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "d48200ba45dd2edfe6286abfc783a81a4a492e98", "status": "affected", "versionType": "git", "lessThan": "9cf5e99c1ae1a85286a76c9a970202750538394c" }, { "version": "d48200ba45dd2edfe6286abfc783a81a4a492e98", "status": "affected", "versionType": "git", "lessThan": "b2e412879595821ff1b5545cbed5f108fba7f5b6" }, { "version": "d48200ba45dd2edfe6286abfc783a81a4a492e98", "status": "affected", "versionType": "git", "lessThan": "e4991910f15013db72f6ec0db7038ea67a57052e" }, { "version": "d48200ba45dd2edfe6286abfc783a81a4a492e98", "status": "affected", "versionType": "git", "lessThan": "f06de1bb6d61f0c18b0213bbc6298960037f9d42" }, { "version": "d48200ba45dd2edfe6286abfc783a81a4a492e98", "status": "affected", "versionType": "git", "lessThan": "4920ab131b2dbae7464b72bdcac465d070254209" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.10", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.10" }, { "version": "5.4.232", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.168", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.93", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }