CVE-2026-98726

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.

Is your site exposed to CVE-2026-98726?

Run a free security scan — no signup, results in seconds.

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/03a0c21f0fd7a872953aae5714303d8f38d1e567 https://git.kernel.org/stable/c/3045128294d347fd38542ad6e174b1b34d9c0751 https://git.kernel.org/stable/c/49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe https://git.kernel.org/stable/c/63fa2d9c9c37020bd2703fe2a6a38027b5abeb15 https://git.kernel.org/stable/c/e5cdb0c0a51e8ff49914ae16ef5360010c40cc85

Frequently Asked Questions

What is CVE-2026-98726? +

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.

How do I check if I'm vulnerable to CVE-2026-98726? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.