VulnerabilityPublished 13 Jan 2026Updated 19 Oct 2026

CVE-2025-68770: Linux kernel · bnxt_en: Fix XDP_TX path

Affects Linux kernelSource CVE Database V5

Not known to be exploited · CVSS 7.5 High · fixed in f17e0c1208485b24d61271bc1ddc8f2087e71561 : patch Linux kernel soon.

Data as of 26 Oct 2026, 14:18 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS

0.3% chance of exploitation in 30 days – higher than 32% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers can reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-10-16.

Patch

Available – fixed in f17e0c1208485b24d61271bc1ddc8f2087e71561, 0373d5c387f24de749cc22e694a14b3a7c7eb515, 4b83902a1e67ff327ab5c6c65021a03e72c081d6

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 13 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to f17e0c1208485b24d61271bc1ddc8f2087e71561, 0373d5c387f24de749cc22e694a14b3a7c7eb515 or 4b83902a1e67ff327ab5c6c65021a03e72c081d6.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 7f0a168b0441ef7fd6b46563efb2706c58ac2a4c, < f17e0c1208485b24d61271bc1ddc8f2087e71561	Fixed in f17e0c1208485b24d61271bc1ddc8f2087e71561
LinuxLinux	Affected ≥ 7f0a168b0441ef7fd6b46563efb2706c58ac2a4c, < 0373d5c387f24de749cc22e694a14b3a7c7eb515	Fixed in 0373d5c387f24de749cc22e694a14b3a7c7eb515
LinuxLinux	Affected ≥ 7f0a168b0441ef7fd6b46563efb2706c58ac2a4c, < 4b83902a1e67ff327ab5c6c65021a03e72c081d6	Fixed in 4b83902a1e67ff327ab5c6c65021a03e72c081d6
LinuxLinux	Affected =6.8	Fixed in–

AI-suggested

A fix is available and has been applied in the Linux kernel source code commits identified by hashes f17e0c1208485b24d61271bc1ddc8f2087e71561, 0373d5c387f24de749cc22e694a14b3a7c7eb515, and 4b83902a1e67ff327ab5c6c65021a03e72c081d6. Users should update to a Linux kernel version that includes these fixes to remediate the vulnerability.

Description

CVE-2025-68770 is a high-severity vulnerability in the Linux kernel's bnxt_en network driver affecting version 6.8. The flaw involves incorrect clearing of event flags in the XDP_TX path, which can cause the TX producer to advance without notifying the hardware, leading to dropped packets and an empty RX ring. This disrupts normal packet processing and network traffic flow. The issue has been fixed in specific Linux kernel commits.

Impact

This vulnerability causes a denial of service condition where network packets are dropped due to the RX ring becoming empty and the TX ring having pending packets that are not processed. This impacts network availability and reliability on affected systems running Linux kernel version 6.8 with the bnxt_en driver.

Summary

The vulnerability in the Linux kernel bnxt_en driver concerns improper handling of event flags during the XDP_TX action in the bnxt_rx_xdp() function. Specifically, the BNXT_TX_EVENT flag may be cleared incorrectly if the TX ring is full and cannot accept more packets, causing the driver to fail to ring the TX doorbell. This results in the RX ring not being refilled and packets being dropped. The fix ensures that BNXT_RX_EVENT is only cleared after a successful call to __bnxt_xmit_xdp(), preventing the described packet loss and ring starvation.

CWE-667Improper Locking (opens in a new tab)
Class weakness
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.
Implementation · Libraries or Frameworks
Use industry standard APIs to implement locking mechanism.
Attack patterns
Leveraging Race Conditions via Symbolic Links (opens in a new tab)
Forced Deadlock (opens in a new tab)
Leveraging Race Conditions (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 12:27 UTC

WeaknessesCWE-667

Technical details

References

Community reviews

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