CVE-2022-48878

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-08-21. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_qca: Fix driver shutdown on closed serdev

The driver shutdown callback (which sends EDL_SOC_RESET to the device over serdev) should not be invoked when HCI device is not open (e.g. if hci_dev_open_sync() failed), because the serdev and its TTY are not open either. Also skip this step if device is powered off (qca_power_shutdown()).

The shutdown callback causes use-after-free during system reboot with Qualcomm Atheros Bluetooth:

Unable to handle kernel paging request at virtual address 0072662f67726fd7 ... CPU: 6 PID: 1 Comm: systemd-shutdow Tainted: G W 6.1.0-rt5-00325-g8a5f56bcfcca #8 Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) Call trace: tty_driver_flush_buffer+0x4/0x30 serdev_device_write_flush+0x24/0x34 qca_serdev_shutdown+0x80/0x130 [hci_uart] device_shutdown+0x15c/0x260 kernel_restart+0x48/0xac

KASAN report:

BUG: KASAN: use-after-free in tty_driver_flush_buffer+0x1c/0x50 Read of size 8 at addr ffff16270c2e0018 by task systemd-shutdow/1

CPU: 7 PID: 1 Comm: systemd-shutdow Not tainted 6.1.0-next-20221220-00014-gb85aaf97fb01-dirty #28 Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT) Call trace: dump_backtrace.part.0+0xdc/0xf0 show_stack+0x18/0x30 dump_stack_lvl+0x68/0x84 print_report+0x188/0x488 kasan_report+0xa4/0xf0 __asan_load8+0x80/0xac tty_driver_flush_buffer+0x1c/0x50 ttyport_write_flush+0x34/0x44 serdev_device_write_flush+0x48/0x60 qca_serdev_shutdown+0x124/0x274 device_shutdown+0x1e8/0x350 kernel_restart+0x48/0xb0 __do_sys_reboot+0x244/0x2d0 __arm64_sys_reboot+0x54/0x70 invoke_syscall+0x60/0x190 el0_svc_common.constprop.0+0x7c/0x160 do_el0_svc+0x44/0xf0 el0_svc+0x2c/0x6c el0t_64_sync_handler+0xbc/0x140 el0t_64_sync+0x190/0x194

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

August 21, 2024

Last Modified

August 5, 2026

Advisory Details (4)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

Bluetooth: hci_qca: Fix driver shutdown on closed serdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ea3ebda47dd56f6e1c62f2e0e1b6e1b0a973e447
generic

Bluetooth: hci_qca: Fix driver shutdown on closed serdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e84ec6e25df9bb0968599e92eacedaf3a0a5b587
generic

Bluetooth: hci_qca: Fix driver shutdown on closed serdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/908d1742b6e694e84ead5c62e4b7c1bfbb8b46a3
generic

Bluetooth: hci_qca: Fix driver shutdown on closed serdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/272970be3dabd24cbe50e393ffee8f04aec3b9a8

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.165—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 52× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 129 total refreshes for this CVE.

  1. 2026-08-07 16:24 UTCEPSS rescore
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  1. 2026-07-23 02:16 UTCEG score recompute
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  74. 2026-06-07 23:28 UTCOSV refresh
  75. 2026-06-07 15:23 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2022-48878?
CVE-2022-48878 is a high vulnerability published on August 21, 2024. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: Fix driver shutdown on closed serdev The driver shutdown callback (which sends EDLSOCRESET to the device over serdev) should not be invoked when HCI device is not open (e.g. if hcidevopen_sync() failed), because…
When was CVE-2022-48878 disclosed?
CVE-2022-48878 was first published in the National Vulnerability Database on August 21, 2024, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-48878 actively exploited?
CVE-2022-48878 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 84.7% of all scored CVEs.
What is the CVSS score of CVE-2022-48878?
CVE-2022-48878 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2022-48878?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-48878, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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