VulnerabilityPublished 18 Oct 2026

CVE-2026-98807: Linux kernel · net/mlx5: Fix slab-out-of-bounds when handling team device events

Source GCVE Database

Authoritative record:CVE-2026-98807· High

Not known to be exploited · fixed in 8117cbc504cb01980258d8a8c9be8f57cf0aaceb : patch Linux kernel soon.

Data as of 26 Oct 2026, 17:16 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 8117cbc504cb01980258d8a8c9be8f57cf0aaceb, 16ca0e79f31ea810346a79dda545ba344ede1d47, 04c824940d52871c49866a4ac67b504146f7cf35 +1

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.

ghsa-7rpx-hg5j-v22f

What to do

Upgrade Linux kernel to 8117cbc504cb01980258d8a8c9be8f57cf0aaceb, 16ca0e79f31ea810346a79dda545ba344ede1d47, 04c824940d52871c49866a4ac67b504146f7cf35 or 3a6e67ff267af2053a793825c3b7844741fed461.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 54493a08e21f46446b3b24577c5a6f229d049757, < 8117cbc504cb01980258d8a8c9be8f57cf0aaceb	Fixed in 8117cbc504cb01980258d8a8c9be8f57cf0aaceb
LinuxLinux	Affected ≥ 54493a08e21f46446b3b24577c5a6f229d049757, < 16ca0e79f31ea810346a79dda545ba344ede1d47	Fixed in 16ca0e79f31ea810346a79dda545ba344ede1d47
LinuxLinux	Affected ≥ 54493a08e21f46446b3b24577c5a6f229d049757, < 04c824940d52871c49866a4ac67b504146f7cf35	Fixed in 04c824940d52871c49866a4ac67b504146f7cf35
LinuxLinux	Affected ≥ 54493a08e21f46446b3b24577c5a6f229d049757, < 3a6e67ff267af2053a793825c3b7844741fed461	Fixed in 3a6e67ff267af2053a793825c3b7844741fed461
LinuxLinux	Affected =5.18	Fixed in–

AI-suggested

A fix is available that adds proper checks to ensure bonding-specific APIs are only called for bonding devices, preventing out-of-bounds memory access. Users should update to a Linux kernel version that includes this patch. Since this is a kernel-level fix, applying the official kernel update is the recommended remediation.

Description

A vulnerability in the Linux kernel's mlx5 driver related to handling team device events has been fixed. The issue involved out-of-bounds memory access triggered by calling bonding-specific APIs on team device structures, which are smaller and incompatible. This was detected by KASAN during event processing. The fix adds checks to ensure bonding-specific functions are only called for bonding devices, preventing invalid memory access. Testing confirmed no regressions and resolved KASAN errors.

References

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