IRQ resource corruption via uninitialized cleanup
Published Dec 23, 2025 · Updated Dec 23, 2025
Improper cleanup in Linux from 6.3 allows attackers to cause unspecified impact via a failed Microchip DSA switch setup. In drivers/net/dsa/microchip/ksz_common.c, the error path calls ksz_irq_free() for ports whose ksz_irq values were never initialized instead of limiting cleanup to fully initialized ports. Reachability requires the Microchip KSZ DSA driver and a setup failure such as ksz_ptp_irq_setup() failing; the public record does not establish attacker control or a resulting crash.
Summary
What happened
Improper cleanup in Linux from 6.3 allows attackers to cause unspecified impact via a failed Microchip DSA switch setup. In drivers/net/dsa/microchip/ksz_common.c, the error path calls ksz_irq_free() for ports whose ksz_irq values were never initialized instead of limiting cleanup to fully initialized ports. Reachability requires the Microchip KSZ DSA driver and a setup failure such as ksz_ptp_irq_setup() failing; the public record does not establish attacker control or a resulting crash.
The record
- CVE
- CVE-2025-68338
- Published
- Dec 23, 2025
- Updated
- Dec 23, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Dec 23, 2025CVE publishedPublication date reported by the CVE source.
- Dec 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.3
- Affected versionversion=cc13ab18b201ab630f03511060ba289b70052959 <25b62cc5b22c45face094ae3e8717258e46d1d19
- Affected versionversion=cc13ab18b201ab630f03511060ba289b70052959 <32abbcf4379a0f851d7eb9d4389e7bf5c64bf6c0
- Affected versionversion=cc13ab18b201ab630f03511060ba289b70052959 <9428654c827fa8d38b898135d26d39ee2d544246
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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