CVE - CVE-2024-46755

CVE-ID
CVE-2024-46755	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: Do not return unused priv in mwifiex_get_priv_by_id() mwifiex_get_priv_by_id() returns the priv pointer corresponding to the bss_num and bss_type, but without checking if the priv is actually currently in use. Unused priv pointers do not have a wiphy attached to them which can lead to NULL pointer dereferences further down the callstack. Fix this by returning only used priv pointers which have priv->bss_mode set to something else than NL80211_IFTYPE_UNSPECIFIED. Said NULL pointer dereference happened when an Accesspoint was started with wpa_supplicant -i mlan0 with this config: network={ ssid="somessid" mode=2 frequency=2412 key_mgmt=WPA-PSK WPA-PSK-SHA256 proto=RSN group=CCMP pairwise=CCMP psk="12345678" } When waiting for the AP to be established, interrupting wpa_supplicant with <ctrl-c> and starting it again this happens: \| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000140 \| Mem abort info: \| ESR = 0x0000000096000004 \| EC = 0x25: DABT (current EL), IL = 32 bits \| SET = 0, FnV = 0 \| EA = 0, S1PTW = 0 \| FSC = 0x04: level 0 translation fault \| Data abort info: \| ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 \| CM = 0, WnR = 0, TnD = 0, TagAccess = 0 \| GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 \| user pgtable: 4k pages, 48-bit VAs, pgdp=0000000046d96000 \| [0000000000000140] pgd=0000000000000000, p4d=0000000000000000 \| Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP \| Modules linked in: caam_jr caamhash_desc spidev caamalg_desc crypto_engine authenc libdes mwifiex_sdio +mwifiex crct10dif_ce cdc_acm onboard_usb_hub fsl_imx8_ddr_perf imx8m_ddrc rtc_ds1307 lm75 rtc_snvs +imx_sdma caam imx8mm_thermal spi_imx error imx_cpufreq_dt fuse ip_tables x_tables ipv6 \| CPU: 0 PID: 8 Comm: kworker/0:1 Not tainted 6.9.0-00007-g937242013fce-dirty #18 \| Hardware name: somemachine (DT) \| Workqueue: events sdio_irq_work \| pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) \| pc : mwifiex_get_cfp+0xd8/0x15c [mwifiex] \| lr : mwifiex_get_cfp+0x34/0x15c [mwifiex] \| sp : ffff8000818b3a70 \| x29: ffff8000818b3a70 x28: ffff000006bfd8a5 x27: 0000000000000004 \| x26: 000000000000002c x25: 0000000000001511 x24: 0000000002e86bc9 \| x23: ffff000006bfd996 x22: 0000000000000004 x21: ffff000007bec000 \| x20: 000000000000002c x19: 0000000000000000 x18: 0000000000000000 \| x17: 000000040044ffff x16: 00500072b5503510 x15: ccc283740681e517 \| x14: 0201000101006d15 x13: 0000000002e8ff43 x12: 002c01000000ffb1 \| x11: 0100000000000000 x10: 02e8ff43002c0100 x9 : 0000ffb100100157 \| x8 : ffff000003d20000 x7 : 00000000000002f1 x6 : 00000000ffffe124 \| x5 : 0000000000000001 x4 : 0000000000000003 x3 : 0000000000000000 \| x2 : 0000000000000000 x1 : 0001000000011001 x0 : 0000000000000000 \| Call trace: \| mwifiex_get_cfp+0xd8/0x15c [mwifiex] \| mwifiex_parse_single_response_buf+0x1d0/0x504 [mwifiex] \| mwifiex_handle_event_ext_scan_report+0x19c/0x2f8 [mwifiex] \| mwifiex_process_sta_event+0x298/0xf0c [mwifiex] \| mwifiex_process_event+0x110/0x238 [mwifiex] \| mwifiex_main_process+0x428/0xa44 [mwifiex] \| mwifiex_sdio_interrupt+0x64/0x12c [mwifiex_sdio] \| process_sdio_pending_irqs+0x64/0x1b8 \| sdio_irq_work+0x4c/0x7c \| process_one_work+0x148/0x2a0 \| worker_thread+0x2fc/0x40c \| kthread+0x110/0x114 \| ret_from_fork+0x10/0x20 \| Code: a94153f3 a8c37bfd d50323bf d65f03c0 (f940a000) \| ---[ end trace 0000000000000000 ]---
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1a05d8d02cfa3540ea5dbd6b39446bd3f515521f URL:https://git.kernel.org/stable/c/1a05d8d02cfa3540ea5dbd6b39446bd3f515521f MISC:https://git.kernel.org/stable/c/9813770f25855b866b8ead8155b8806b2db70f6d URL:https://git.kernel.org/stable/c/9813770f25855b866b8ead8155b8806b2db70f6d MISC:https://git.kernel.org/stable/c/a12cf97cbefa139ef8d95081f2ea047cbbd74b7a URL:https://git.kernel.org/stable/c/a12cf97cbefa139ef8d95081f2ea047cbbd74b7a MISC:https://git.kernel.org/stable/c/c145eea2f75ff7949392aebecf7ef0a81c1f6c14 URL:https://git.kernel.org/stable/c/c145eea2f75ff7949392aebecf7ef0a81c1f6c14 MISC:https://git.kernel.org/stable/c/c16916dd6c16fa7e13ca3923eb6b9f50d848ad03 URL:https://git.kernel.org/stable/c/c16916dd6c16fa7e13ca3923eb6b9f50d848ad03 MISC:https://git.kernel.org/stable/c/c2618dcb26c7211342b54520b5b148c0d3471c8a URL:https://git.kernel.org/stable/c/c2618dcb26c7211342b54520b5b148c0d3471c8a MISC:https://git.kernel.org/stable/c/cb67b2e51b75f1a17bee7599c8161b96e1808a70 URL:https://git.kernel.org/stable/c/cb67b2e51b75f1a17bee7599c8161b96e1808a70 MISC:https://git.kernel.org/stable/c/d834433ff313838a259bb6607055ece87b895b66 URL:https://git.kernel.org/stable/c/d834433ff313838a259bb6607055ece87b895b66
Assigning CNA
kernel.org
Date Record Created
20240911	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240911)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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