Security readout for executives and security teams
Plain-English summary
A Linux network-driver flaw can corrupt a transmit descriptor when a packet uses an unusually high number of fragments. The resulting transmission timeout may disrupt network availability. The supplied CVSS score is 8.6, but the sources do not establish a practical remote attack path or observed exploitation.
Executive priority
Treat as a high-priority availability risk for network-critical Linux hosts using bnxt_en. Confirm exposure promptly and patch through supported distribution channels. Systems not using this driver are unlikely to be affected by the described flaw.
Technical view
The bnxt_en driver writes the packet’s total buffer-descriptor count into a five-bit bd_cnt field, where 32 must be encoded as zero. Without proper masking, an out-of-range fragment count can corrupt the transmit buffer descriptor and cause a TX timeout. The supplied commits correct the masking behavior.
Likely exposure
Exposure is limited to Linux systems using the bnxt_en driver where CONFIG_MAX_SKB_FRAGS and packet fragmentation can approach or exceed the hardware limit. The supplied affected-version data is ambiguous, so distribution kernels and backports require vendor-specific confirmation.
Exploitation context
The CVE is not listed as CISA KEV in the supplied bundle, and no cited source reports active exploitation. Although the CVSS vector uses network attack complexity, the available evidence does not demonstrate that an unauthenticated remote attacker can reliably trigger the condition.
Researcher notes
The supplied version entries are internally unclear, including isolated values and a duplicated commit identifier marked unaffected. Researchers should rely on kernel commit ancestry and distribution backport records rather than version strings alone. A subsequent bounds check is mentioned, but its availability and relationship to complete remediation are not established here.
Mitigation direction
- Install a vendor-supported kernel containing the referenced fix or an equivalent backport.
- Check Linux distribution security guidance for exact fixed package versions.
- Review non-default CONFIG_MAX_SKB_FRAGS settings that may increase exposure.
- Prioritize network-critical systems using bnxt_en until their fix status is confirmed.
Validation and detection
- Inventory systems actively using the bnxt_en network driver.
- Record kernel and distribution package versions for affected hosts.
- Confirm the referenced correction or an equivalent vendor backport is present.
- Review logs and interface telemetry for TX timeouts or transmission stalls.
- Re-test network transmission stability after updating the kernel.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2025-22108 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H3.94.7LinuxVulnerability scoring details
Base CVSS 3.1 score
8.6HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/f60b41b815826f15c4d0323f923f398c423178d0CVE reference, Linux
- https://git.kernel.org/stable/c/107b25db61122d8f990987895c2912927b8b6e3fCVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.