CVE-2022-48759

HIGHNVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2024-06-20. NVD baseline CVSS 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.0Exploit: 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:

rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev

struct rpmsg_ctrldev contains a struct cdev. The current code frees the rpmsg_ctrldev struct in rpmsg_ctrldev_release_device(), but the cdev is a managed object, therefore its release is not predictable and the rpmsg_ctrldev could be freed before the cdev is entirely released, as in the backtrace below.

[ 93.625603] ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x7c [ 93.636115] WARNING: CPU: 0 PID: 12 at lib/debugobjects.c:488 debug_print_object+0x13c/0x1b0 [ 93.644799] Modules linked in: veth xt_cgroup xt_MASQUERADE rfcomm algif_hash algif_skcipher af_alg uinput ip6table_nat fuse uvcvideo videobuf2_vmalloc venus_enc venus_dec videobuf2_dma_contig hci_uart btandroid btqca snd_soc_rt5682_i2c bluetooth qcom_spmi_temp_alarm snd_soc_rt5682v [ 93.715175] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.4.163-lockdep #26 [ 93.723855] Hardware name: Google Lazor (rev3 - 8) with LTE (DT) [ 93.730055] Workqueue: events kobject_delayed_cleanup [ 93.735271] pstate: 60c00009 (nZCv daif +PAN +UAO) [ 93.740216] pc : debug_print_object+0x13c/0x1b0 [ 93.744890] lr : debug_print_object+0x13c/0x1b0 [ 93.749555] sp : ffffffacf5bc7940 [ 93.752978] x29: ffffffacf5bc7940 x28: dfffffd000000000 [ 93.758448] x27: ffffffacdb11a800 x26: dfffffd000000000 [ 93.763916] x25: ffffffd0734f856c x24: dfffffd000000000 [ 93.769389] x23: 0000000000000000 x22: ffffffd0733c35b0 [ 93.774860] x21: ffffffd0751994a0 x20: ffffffd075ec27c0 [ 93.780338] x19: ffffffd075199100 x18: 00000000000276e0 [ 93.785814] x17: 0000000000000000 x16: dfffffd000000000 [ 93.791291] x15: ffffffffffffffff x14: 6e6968207473696c [ 93.796768] x13: 0000000000000000 x12: ffffffd075e2b000 [ 93.802244] x11: 0000000000000001 x10: 0000000000000000 [ 93.807723] x9 : d13400dff1921900 x8 : d13400dff1921900 [ 93.813200] x7 : 0000000000000000 x6 : 0000000000000000 [ 93.818676] x5 : 0000000000000080 x4 : 0000000000000000 [ 93.824152] x3 : ffffffd0732a0fa4 x2 : 0000000000000001 [ 93.829628] x1 : ffffffacf5bc7580 x0 : 0000000000000061 [ 93.835104] Call trace: [ 93.837644] debug_print_object+0x13c/0x1b0 [ 93.841963] __debug_check_no_obj_freed+0x25c/0x3c0 [ 93.846987] debug_check_no_obj_freed+0x18/0x20 [ 93.851669] slab_free_freelist_hook+0xbc/0x1e4 [ 93.856346] kfree+0xfc/0x2f4 [ 93.859416] rpmsg_ctrldev_release_device+0x78/0xb8 [ 93.864445] device_release+0x84/0x168 [ 93.868310] kobject_cleanup+0x12c/0x298 [ 93.872356] kobject_delayed_cleanup+0x10/0x18 [ 93.876948] process_one_work+0x578/0x92c [ 93.881086] worker_thread+0x804/0xcf8 [ 93.884963] kthread+0x2a8/0x314 [ 93.888303] ret_from_fork+0x10/0x18

The cdev_device_add/del() API was created to address this issue (see commit '233ed09d7fda ("chardev: add helper function to register char devs with a struct device")'), use it instead of cdev add/del().

CVSS v3
7.0
EG Score
7.0(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity70% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

June 20, 2024

Last Modified

August 5, 2026

Advisory Details (7)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b7fb2dad571d1e21173c06cef0bced77b323990a
generic

rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d6cdc6ae542845d4d0ac8b6d99362bde7042a3c7
generic

rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/85aba11a8ea92a8eef2de95ebbe063086fd62d9c
generic

rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1dbb206730f3e5ce90014ad569ddf8167ec4124a
generic

rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/da27b834c1e0222e149e06caddf7718478086d1b
generic

rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/70cb4295ec806b663665e1d2ed15caab6159880e
generic

rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/74d85e9fbc7022a4011102c7474a9c7aeb704a35

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 4.14.265—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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1~bpo10+1 ... 5.10.92-2 (9 versions)5.10.103-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—5.16.7-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—5.16.7-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—5.16.7-1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 22× 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 163 total refreshes for this CVE.

  1. 2026-09-16 14:05 UTCEPSS rescore
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  3. 2026-09-15 03:07 UTCEPSS rescore
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  9. 2026-09-07 04:18 UTCOSV refresh
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  24. 2026-08-20 14:31 UTCOSV refresh
  25. 2026-08-19 17:01 UTCEPSS rescore
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  1. 2026-08-17 13:44 UTCEPSS rescore
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  13. 2026-08-05 09:39 UTCEG score recompute
  14. 2026-08-05 09:39 UTCGHSA enrichment
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  17. 2026-08-04 12:04 UTCGHSA enrichment
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  20. 2026-08-04 09:49 UTCGHSA enrichment
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  25. 2026-07-31 20:42 UTCOSV refresh
  26. 2026-07-30 16:25 UTCEPSS rescore
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  35. 2026-07-23 02:16 UTCEG score recompute
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  54. 2026-07-13 22:28 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2022-48759?
CVE-2022-48759 is a high vulnerability published on June 20, 2024. In the Linux kernel, the following vulnerability has been resolved: rpmsg: char: Fix race between the release of rpmsg_ctrldev and cdev struct rpmsg_ctrldev contains a struct cdev. The current code frees the rpmsgctrldev struct in rpmsgctrldevreleasedevice(), but the cdev is a managed object,…
When was CVE-2022-48759 disclosed?
CVE-2022-48759 was first published in the National Vulnerability Database on June 20, 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-2022-48759 actively exploited?
CVE-2022-48759 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 92.9% of all scored CVEs.
What is the CVSS score of CVE-2022-48759?
CVE-2022-48759 has a CVSS v3 base score of 7.0 (NVD).
How do I remediate CVE-2022-48759?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-48759, 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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