VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98726: Linux kernel · nvme-multipath: fix underflow in ANA log bounds checks

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e5cdb0c0a51e8ff49914ae16ef5360010c40cc85 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e5cdb0c0a51e8ff49914ae16ef5360010c40cc85, 3045128294d347fd38542ad6e174b1b34d9c0751, 63fa2d9c9c37020bd2703fe2a6a38027b5abeb15 +2

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 ≥ 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba, < e5cdb0c0a51e8ff49914ae16ef5360010c40cc85	Fixed in e5cdb0c0a51e8ff49914ae16ef5360010c40cc85
LinuxLinux	Affected ≥ 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba, < 3045128294d347fd38542ad6e174b1b34d9c0751	Fixed in 3045128294d347fd38542ad6e174b1b34d9c0751
LinuxLinux	Affected ≥ 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba, < 63fa2d9c9c37020bd2703fe2a6a38027b5abeb15	Fixed in 63fa2d9c9c37020bd2703fe2a6a38027b5abeb15
LinuxLinux	Affected ≥ 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba, < 49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe	Fixed in 49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe
LinuxLinux	Affected ≥ 0d0b660f214dc4905db7b6bc998bad0c16dfb1ba, < 03a0c21f0fd7a872953aae5714303d8f38d1e567	Fixed in 03a0c21f0fd7a872953aae5714303d8f38d1e567
LinuxLinux	Affected =4.19	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: nvme-multipath: fix underflow in ANA log bounds checks The number of ANA groups advertised through Identify Controller sizes the ANA log buffer. The ANA log header and group descriptors independently supply the number of groups and namespace IDs to parse. Both bounds checks subtract an untrusted object size from ana_log_size before comparing the current offset. If the object is larger than the buffer, the size_t subtraction underflows and lets the parser read beyond ana_log_buf. Check the current offset before the first subtraction and compare each object size with the remaining buffer instead. This rejects inconsistent ANA data before dereferencing a truncated group descriptor or walking an oversized namespace ID array.

References

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