CVE-2023-54197 — Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"
In the Linux kernel, the following vulnerability has been resolved: Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work" This reverts commit 1e9ac114c4428fdb7ff4635b45d4f46017e8916f. This patch introduces a possible null-ptr-def problem. Revert it. And the fixed bug by this patch have resolved by commit 73f7b171b7c0 ("Bluetooth: btsdio: fix use after free bug in btsdio_remove due to race condition").
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.2% (30-day exploitation probability)+2
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- Search available logs for exploit probes, errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ 1e9ac114c4428fdb7ff4635b45d4f46017e8916f and < db2bf510bd5d57f064d9e1db395ed86a08320c54version 6.3≥ 6.2.9 and < 6.2.15≥ 6.1.22 and < 6.1.28≥ 5.15.105 and < 5.15.111≥ 5.10.177 and < 5.10.180≥ 5.4.240 and < 5.4.243≥ 4.19.280 and < 4.19.283 and 9 more≥ 4.14.312 and < 4.14.315≥ 95eacef5692545f199fae4e52abfbfa273acb351 and < 3b4ed52009723f7dfca7a8ca95163bfb441bfb76≥ 1e9ac114c4428fdb7ff4635b45d4f46017e8916f and < d8d7ce037d9a8f1f0714ece268c4c2c50845bbc3≥ c59c65a14e8f7d738429648833f3bb3f9df0513f and < 8f83fa62614c282dd5d1211a0dd99c6a0a515b81≥ cbf8deacb7053ce3e3fed64b277c6c6989e65bba and < 952030c914b5f2288609efe868537afcff7a3f51≥ 8efae2112d910d8e5166dd0a836791b08721eef1 and < a789192f366147a0fbb395650079906d1d04e0b9≥ da3d3fdfb4d523c5da30e35a8dd90e04f0fd8962 and < 0837d10f6c37a47a0c73bccf1e39513613a2fcc2≥ a18fb433ceb56e0787546a9d77056dd0f215e762 and < de0ffb5145c9f418ad76f00e58d4b91c680410b2≥ af4d48754d5517d33bac5e504ff1f1de0808e29e and < 70a104588e3131415e559c06deb834ce259a285a |
Vulnerable | CVE Program (cve.org) e CISA ADP |
EPSS over time FIRST
Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.23%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Not enough vector or weakness data: use the affected application’s logs as a starting point.
Timeline
What happened to this CVE, newest first.
- 2026
- Record published
- Affected products added · linux/linux
- Source status changed · → Deferred
- Record created in this database
- 2025
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 13, 2026 – Oct 13, 2026
References
9 on the record
- git.kernel.org/stable/c/8f83fa62614c282dd5d1211a0dd99c6a0a515b81
- git.kernel.org/stable/c/db2bf510bd5d57f064d9e1db395ed86a08320c54
- git.kernel.org/stable/c/952030c914b5f2288609efe868537afcff7a3f51
- git.kernel.org/stable/c/3b4ed52009723f7dfca7a8ca95163bfb441bfb76
- git.kernel.org/stable/c/d8d7ce037d9a8f1f0714ece268c4c2c50845bbc3
- git.kernel.org/stable/c/70a104588e3131415e559c06deb834ce259a285a
- git.kernel.org/stable/c/de0ffb5145c9f418ad76f00e58d4b91c680410b2
- git.kernel.org/stable/c/a789192f366147a0fbb395650079906d1d04e0b9
- git.kernel.org/stable/c/0837d10f6c37a47a0c73bccf1e39513613a2fcc2
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 22h
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 22h
- Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
- Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
- Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
- Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No CVSS score published by NVD, the CNA, CISA or GitHub so far.
- No fixed version, patch or mitigation documented.
- No CISA SSVC assessment.
- No CWE classification.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2023-54197 is "Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.23% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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