CVE-2022-48918 Vulnerability Analysis & Exploit Details

CVE-2022-48918
Vulnerability Scoring

5.5

/10

Significant Risk

Security assessments indicate that CVE-2022-48918 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

Attack Complexity: Low
Exploits can be performed without significant complexity or special conditions.
Attack Vector: Local
Vulnerability requires local system access.
Privileges Required: Low
Some privileges are necessary to exploit the vulnerability.
Scope: Unchanged
Exploit remains within the originally vulnerable component.
User Interaction: None
No user interaction is necessary for exploitation.

CVE-2022-48918 Details

Status: Analyzed

Last updated: 🕓 27 Aug 2024, 16:07 UTC
Originally published on: 🕑 22 Aug 2024, 02:15 UTC

Time between publication and last update: 5 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVE-2022-48918 Vulnerability Summary

CVE-2022-48918: In the Linux kernel, the following vulnerability has been resolved: iwlwifi: mvm: check debugfs_dir ptr before use When "debugfs=off" is used on the kernel command line, iwiwifi's mvm module uses an invalid/unchecked debugfs_dir pointer and causes a BUG: BUG: kernel NULL pointer dereference, address: 000000000000004f #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP CPU: 1 PID: 503 Comm: modprobe Tainted: G W 5.17.0-rc5 #7 Hardware name: Dell Inc. Inspiron 15 5510/076F7Y, BIOS 2.4.1 11/05/2021 RIP: 0010:iwl_mvm_dbgfs_register+0x692/0x700 [iwlmvm] Code: 69 a0 be 80 01 00 00 48 c7 c7 50 73 6a a0 e8 95 cf ee e0 48 8b 83 b0 1e 00 00 48 c7 c2 54 73 6a a0 be 64 00 00 00 48 8d 7d 8c <48> 8b 48 50 e8 15 22 07 e1 48 8b 43 28 48 8d 55 8c 48 c7 c7 5f 73 RSP: 0018:ffffc90000a0ba68 EFLAGS: 00010246 RAX: ffffffffffffffff RBX: ffff88817d6e3328 RCX: ffff88817d6e3328 RDX: ffffffffa06a7354 RSI: 0000000000000064 RDI: ffffc90000a0ba6c RBP: ffffc90000a0bae0 R08: ffffffff824e4880 R09: ffffffffa069d620 R10: ffffc90000a0ba00 R11: ffffffffffffffff R12: 0000000000000000 R13: ffffc90000a0bb28 R14: ffff88817d6e3328 R15: ffff88817d6e3320 FS: 00007f64dd92d740(0000) GS:ffff88847f640000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000004f CR3: 000000016fc79001 CR4: 0000000000770ee0 PKRU: 55555554 Call Trace: <TASK> ? iwl_mvm_mac_setup_register+0xbdc/0xda0 [iwlmvm] iwl_mvm_start_post_nvm+0x71/0x100 [iwlmvm] iwl_op_mode_mvm_start+0xab8/0xb30 [iwlmvm] _iwl_op_mode_start+0x6f/0xd0 [iwlwifi] iwl_opmode_register+0x6a/0xe0 [iwlwifi] ? 0xffffffffa0231000 iwl_mvm_init+0x35/0x1000 [iwlmvm] ? 0xffffffffa0231000 do_one_initcall+0x5a/0x1b0 ? kmem_cache_alloc+0x1e5/0x2f0 ? do_init_module+0x1e/0x220 do_init_module+0x48/0x220 load_module+0x2602/0x2bc0 ? __kernel_read+0x145/0x2e0 ? kernel_read_file+0x229/0x290 __do_sys_finit_module+0xc5/0x130 ? __do_sys_finit_module+0xc5/0x130 __x64_sys_finit_module+0x13/0x20 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f64dda564dd Code: 5b 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1b 29 0f 00 f7 d8 64 89 01 48 RSP: 002b:00007ffdba393f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f64dda564dd RDX: 0000000000000000 RSI: 00005575399e2ab2 RDI: 0000000000000001 RBP: 000055753a91c5e0 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000001 R11: 0000000000000246 R12: 00005575399e2ab2 R13: 000055753a91ceb0 R14: 0000000000000000 R15: 000055753a923018 </TASK> Modules linked in: btintel(+) btmtk bluetooth vfat snd_hda_codec_hdmi fat snd_hda_codec_realtek snd_hda_codec_generic iwlmvm(+) snd_sof_pci_intel_tgl mac80211 snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence soundwire_bus snd_sof_intel_hda snd_sof_pci snd_sof snd_sof_xtensa_dsp snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core btrfs snd_compress snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec raid6_pq iwlwifi snd_hda_core snd_pcm snd_timer snd soundcore cfg80211 intel_ish_ipc(+) thunderbolt rfkill intel_ishtp ucsi_acpi wmi i2c_hid_acpi i2c_hid evdev CR2: 000000000000004f ---[ end trace 0000000000000000 ]--- Check the debugfs_dir pointer for an error before using it. [change to make both conditional]

Assessing the Risk of CVE-2022-48918

Access Complexity Graph

The exploitability of CVE-2022-48918 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2022-48918

CVE-2022-48918 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2022-48918, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2022-48918, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: None
CVE-2022-48918 has no significant impact on data confidentiality.
Integrity: None
CVE-2022-48918 poses no threat to data integrity.
Availability: High
CVE-2022-48918 can disrupt system operations, potentially causing complete denial of service (DoS).

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.042% (probability of exploit)

EPSS Percentile: 5.07% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 94.93% of others.

CVE-2022-48918 References

External References

CWE Common Weakness Enumeration

CWE-476

Vulnerable Configurations

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cpe:2.3:o:linux:linux_kernel:5.15.10:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.10:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.11:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.11:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.12:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.12:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.13:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.13:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.14:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.14:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.15:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.15:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.16:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.16:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.17:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.17:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.18:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.18:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.19:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.19:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.20:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.20:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.21:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.21:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.22:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.22:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.23:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.23:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.24:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.24:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.25:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.25:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.26:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15.26:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.1:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.1:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.2:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.2:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.3:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.3:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.4:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.4:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.5:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.5:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.6:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.7:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.7:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.8:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.8:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.9:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.9:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.10:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.10:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.11:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.11:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.12:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16.12:*:*:*:*:*:*:*

Protect Your Infrastructure against CVE-2022-48918: Combat Critical CVE Threats

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