{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47540","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-05-24T15:02:54.828Z","datePublished":"2024-05-24T15:09:47.256Z","dateUpdated":"2025-05-04T07:13:08.646Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:13:08.646Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode\n\nFix the following NULL pointer dereference in mt7915_get_phy_mode\nroutine adding an ibss interface to the mt7915 driver.\n\n[  101.137097] wlan0: Trigger new scan to find an IBSS to join\n[  102.827039] wlan0: Creating new IBSS network, BSSID 26:a4:50:1a:6e:69\n[  103.064756] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[  103.073670] Mem abort info:\n[  103.076520]   ESR = 0x96000005\n[  103.079614]   EC = 0x25: DABT (current EL), IL = 32 bits\n[  103.084934]   SET = 0, FnV = 0\n[  103.088042]   EA = 0, S1PTW = 0\n[  103.091215] Data abort info:\n[  103.094104]   ISV = 0, ISS = 0x00000005\n[  103.098041]   CM = 0, WnR = 0\n[  103.101044] user pgtable: 4k pages, 39-bit VAs, pgdp=00000000460b1000\n[  103.107565] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000\n[  103.116590] Internal error: Oops: 96000005 [#1] SMP\n[  103.189066] CPU: 1 PID: 333 Comm: kworker/u4:3 Not tainted 5.10.75 #0\n[  103.195498] Hardware name: MediaTek MT7622 RFB1 board (DT)\n[  103.201124] Workqueue: phy0 ieee80211_iface_work [mac80211]\n[  103.206695] pstate: 20000005 (nzCv daif -PAN -UAO -TCO BTYPE=--)\n[  103.212705] pc : mt7915_get_phy_mode+0x68/0x120 [mt7915e]\n[  103.218103] lr : mt7915_mcu_add_bss_info+0x11c/0x760 [mt7915e]\n[  103.223927] sp : ffffffc011cdb9e0\n[  103.227235] x29: ffffffc011cdb9e0 x28: ffffff8006563098\n[  103.232545] x27: ffffff8005f4da22 x26: ffffff800685ac40\n[  103.237855] x25: 0000000000000001 x24: 000000000000011f\n[  103.243165] x23: ffffff8005f4e260 x22: ffffff8006567918\n[  103.248475] x21: ffffff8005f4df80 x20: ffffff800685ac58\n[  103.253785] x19: ffffff8006744400 x18: 0000000000000000\n[  103.259094] x17: 0000000000000000 x16: 0000000000000001\n[  103.264403] x15: 000899c3a2d9d2e4 x14: 000899bdc3c3a1c8\n[  103.269713] x13: 0000000000000000 x12: 0000000000000000\n[  103.275024] x11: ffffffc010e30c20 x10: 0000000000000000\n[  103.280333] x9 : 0000000000000050 x8 : ffffff8006567d88\n[  103.285642] x7 : ffffff8006563b5c x6 : ffffff8006563b44\n[  103.290952] x5 : 0000000000000002 x4 : 0000000000000001\n[  103.296262] x3 : 0000000000000001 x2 : 0000000000000001\n[  103.301572] x1 : 0000000000000000 x0 : 0000000000000011\n[  103.306882] Call trace:\n[  103.309328]  mt7915_get_phy_mode+0x68/0x120 [mt7915e]\n[  103.314378]  mt7915_bss_info_changed+0x198/0x200 [mt7915e]\n[  103.319941]  ieee80211_bss_info_change_notify+0x128/0x290 [mac80211]\n[  103.326360]  __ieee80211_sta_join_ibss+0x308/0x6c4 [mac80211]\n[  103.332171]  ieee80211_sta_create_ibss+0x8c/0x10c [mac80211]\n[  103.337895]  ieee80211_ibss_work+0x3dc/0x614 [mac80211]\n[  103.343185]  ieee80211_iface_work+0x388/0x3f0 [mac80211]\n[  103.348495]  process_one_work+0x288/0x690\n[  103.352499]  worker_thread+0x70/0x464\n[  103.356157]  kthread+0x144/0x150\n[  103.359380]  ret_from_fork+0x10/0x18\n[  103.362952] Code: 394008c3 52800220 394000e4 7100007f (39400023)"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/mediatek/mt76/mt7915/mcu.c"],"versions":[{"version":"e57b7901469fc0b021930b83a8094baaf3d81b09","lessThan":"932b338f4e5c4cb0c2ed640da3bced1e63620198","status":"affected","versionType":"git"},{"version":"e57b7901469fc0b021930b83a8094baaf3d81b09","lessThan":"14b03b8cebdf18ff13c39d58501b625411314de2","status":"affected","versionType":"git"},{"version":"e57b7901469fc0b021930b83a8094baaf3d81b09","lessThan":"6e53d6d26920d5221d3f4d4f5ffdd629ea69aa5c","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/net/wireless/mediatek/mt76/mt7915/mcu.c"],"versions":[{"version":"5.8","status":"affected"},{"version":"0","lessThan":"5.8","status":"unaffected","versionType":"semver"},{"version":"5.10.84","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.7","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.16","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":"5.10.84"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.15.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/932b338f4e5c4cb0c2ed640da3bced1e63620198"},{"url":"https://git.kernel.org/stable/c/14b03b8cebdf18ff13c39d58501b625411314de2"},{"url":"https://git.kernel.org/stable/c/6e53d6d26920d5221d3f4d4f5ffdd629ea69aa5c"}],"title":"mt76: mt7915: fix NULL pointer dereference in mt7915_get_phy_mode","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:39:59.621Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/932b338f4e5c4cb0c2ed640da3bced1e63620198","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/14b03b8cebdf18ff13c39d58501b625411314de2","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/6e53d6d26920d5221d3f4d4f5ffdd629ea69aa5c","tags":["x_transferred"]}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47540","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:35:20.346625Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-11T17:33:20.936Z"}}]}}