VulnerabilityPublished 18 Oct 2026

CVE-2026-98597: Linux kernel · net: usb: sr9700: include receive overhead in the length check

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e1f5b74edccf4c9b671b6bce4435a98746fe5167 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e1f5b74edccf4c9b671b6bce4435a98746fe5167, c06bde80ae7a7b595732f7cabcb92cf08db9d56a, baf07d5153d3af8f98e65e2d3566bc0d50c4e3ac +5

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ c9b37458e95629b1d1171457afdcc1bf1eb7881d, < e1f5b74edccf4c9b671b6bce4435a98746fe5167	Fixed in e1f5b74edccf4c9b671b6bce4435a98746fe5167
LinuxLinux	Affected ≥ c9b37458e95629b1d1171457afdcc1bf1eb7881d, < c06bde80ae7a7b595732f7cabcb92cf08db9d56a	Fixed in c06bde80ae7a7b595732f7cabcb92cf08db9d56a
LinuxLinux	Affected ≥ c9b37458e95629b1d1171457afdcc1bf1eb7881d, < baf07d5153d3af8f98e65e2d3566bc0d50c4e3ac	Fixed in baf07d5153d3af8f98e65e2d3566bc0d50c4e3ac
LinuxLinux	Affected ≥ c9b37458e95629b1d1171457afdcc1bf1eb7881d, < 8488779d9bddbdb33588c9fc2c0657a3da773f61	Fixed in 8488779d9bddbdb33588c9fc2c0657a3da773f61
LinuxLinux	Affected ≥ c9b37458e95629b1d1171457afdcc1bf1eb7881d, < 92d88c88390fc62444c00a1a22078f838e03891f	Fixed in 92d88c88390fc62444c00a1a22078f838e03891f
LinuxLinux	Affected ≥ c9b37458e95629b1d1171457afdcc1bf1eb7881d, < 9b59b00890c5dea355b4cc8795ab8eeafc044e48	Fixed in 9b59b00890c5dea355b4cc8795ab8eeafc044e48

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

The vulnerability has been fixed in the Linux kernel in the commits identified by the fixedVersions hashes. Users and administrators should update their Linux kernel to a version including these fixes to remediate the issue. Since this is a kernel-level fix, applying the updated kernel is the recommended mitigation.

Description

A vulnerability in the Linux kernel's USB network driver for the sr9700 device involves improper length checking during packet reception. The flaw relates to how the driver subtracts the Ethernet CRC from the packet length but compares the payload length against the entire remaining receive buffer, potentially causing incorrect handling of packet data. This issue was identified through static analysis and has been fixed in subsequent kernel commits.

Impact

The vulnerability could cause incorrect handling of received USB network packets in the sr9700 driver, potentially leading to buffer mismanagement or data corruption during packet processing. No public exploits or in-the-wild exploitation are known. The impact is limited to the Linux kernel versions affected by this driver code.

Summary

The Linux kernel's net: usb: sr9700 driver had a vulnerability where the receive length check did not properly account for the receive overhead. Specifically, the payload length was compared against the whole remaining receive buffer without considering the SR_RX_OVERHEAD, which includes a three-byte header and a four-byte CRC. This could lead to incorrect packet processing. The fix requires the payload to fit after the SR_RX_OVERHEAD before copying or advancing the buffer cursor. The issue was discovered by static analysis and resolved in multiple kernel commits.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 10:10 UTC

Technical details

References

Community reviews

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