CVE-2023-53658 — spi: bcm-qspi: return error if neither hif_mspi nor mspi is available
In the Linux kernel, the following vulnerability has been resolved: spi: bcm-qspi: return error if neither hif_mspi nor mspi is available If neither a "hif_mspi" nor "mspi" resource is present, the driver will just early exit in probe but still return success. Apart from not doing anything meaningful, this would then also lead to a null pointer access on removal, as platform_get_drvdata() would return NULL, which it would then try to dereference when trying to unregister the spi master. Fix this by unconditionally calling devm_ioremap_resource(), as it can handle a NULL res and will then return a viable ERR_PTR() if we get one. The "return 0;" was previously a "goto qspi_resource_err;" where then ret was returned, but since ret was still initialized to 0 at this place this was a valid conversion in 63c5395bb7a9 ("spi: bcm-qspi: Fix use-after-free on unbind"). The issue was not introduced by this commit, only made more obvious.
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)+1
- Technical severity (medium)+3
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.
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
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, Linux Linux Kernel).
- Apply the fixed version or the patch documented under Remediation.
- Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ fa236a7ef24048bafaeed13f68df35a819794758 and < a91c34357afcfaa5307e254f22a8452550a07b34≥ fa236a7ef24048bafaeed13f68df35a819794758 and < d20db3c58a7f9361e370a7850ceb60dbdf62eea3≥ fa236a7ef24048bafaeed13f68df35a819794758 and < 398e6a015877d44327f754aeb48ff3354945c78c≥ fa236a7ef24048bafaeed13f68df35a819794758 and < 32b9c8f7892c19f7f5c9fed5fb410b9fd5990bb6≥ fa236a7ef24048bafaeed13f68df35a819794758 and < 217b6ea8cf7b819477bca597a6ae2d43d38ba283≥ fa236a7ef24048bafaeed13f68df35a819794758 and < d3dcdb43c872a3b967345144151a2c9bb9124c9b≥ fa236a7ef24048bafaeed13f68df35a819794758 and < 22ae32d80ef590d12a2364e4621f90f7c58445c7≥ fa236a7ef24048bafaeed13f68df35a819794758 and < 7c1f23ad34fcdace50275a6aa1e1969b41c6233f and 1 moreversion 4.9 |
Vulnerable | CVE Program (cve.org) e CISA ADP |
| Linux | Linux Kernel | ≥ 4.9 and < 4.14.322≥ 4.15 and < 4.19.291≥ 4.20 and < 5.4.251≥ 5.5 and < 5.10.188≥ 5.11 and < 5.15.121≥ 5.16 and < 6.1.39≥ 6.2 and < 6.4.4 | Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 5.5 | CVSS 3.1 | Medium | 1.8 | 3.6 | nvd@nist.gov via NIST National Vulnerability Database |
| 5.5 | CVSS 3.1 | Medium | — | — | GitHub, Inc. via GitHub Security Advisories |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (score shown at the top: nvd@nist.gov) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
EPSS over time FIRST
Oct 28, 2026 → Oct 29, 2026 · 2 reading(s) · max 0.16%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
- Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · linux/linux
- Record published
- Fix documented
- Affected products added · linux/linux kernel
- CVSS changed · 5.5
- Source status changed · → Analyzed
- Record created in this database
- 2025
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 2× References added · Oct 28, 2026 – Oct 28, 2026
- 1× Official description updated · Oct 28, 2026 – Oct 28, 2026
References
10 on the record
- git.kernel.org/stable/c/398e6a015877d44327f754aeb48ff3354945c78c
- git.kernel.org/stable/c/22ae32d80ef590d12a2364e4621f90f7c58445c7
- git.kernel.org/stable/c/a91c34357afcfaa5307e254f22a8452550a07b34
- git.kernel.org/stable/c/d20db3c58a7f9361e370a7850ceb60dbdf62eea3
- git.kernel.org/stable/c/d3dcdb43c872a3b967345144151a2c9bb9124c9b
- git.kernel.org/stable/c/32b9c8f7892c19f7f5c9fed5fb410b9fd5990bb6
- git.kernel.org/stable/c/217b6ea8cf7b819477bca597a6ae2d43d38ba283
- git.kernel.org/stable/c/7c1f23ad34fcdace50275a6aa1e1969b41c6233f
- nvd.nist.gov/vuln/detail/CVE-2023-53658
- github.com/advisories/GHSA-f5pr-pcc8-pgcp
Elsewhere on this site
Related CVEs (same products)
- Unknown CVE-2026-99216 Drivers: hv: Don't reset VMBus connection state on error/exit paths 2d
- Unknown CVE-2026-99215 power: supply: core: prevent unregistering a power supply while a callback runs 2d
- Unknown CVE-2026-99207 scsi: target: Disable interrupts while holding delayed_cmd_lock 2d
- Unknown CVE-2026-99208 drm/xe/oa: Zero OA buffer at allocation 2d
- Unknown CVE-2026-99209 drm/xe: skip eviction of a BO with no resource 2d
- Unknown CVE-2026-99210 accel/rocket: clear rdev on device init failure 2d
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 CISA SSVC assessment.
- 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-2023-53658 is "spi: bcm-qspi: return error if neither hif_mspi nor mspi is available", rated Medium. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. EPSS 0.16% 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.
Comments
Moderated technical discussion. Read the community guidelines.
No comments yet.
Sign in or create an account to comment and suggest corrections.