nvme-multipath: fix underflow in ANA log bounds checks
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.
CVE-2026-98726
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98726
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
"lessThan": "3045128294d347fd38542ad6e174b1b34d9c0751",
"versionType": "git"
},
{
"status": "affected",
"version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
"lessThan": "03a0c21f0fd7a872953aae5714303d8f38d1e567",
"versionType": "git"
},
{
"status": "affected",
"version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
"lessThan": "49e8a3224c91fd5fbf22f4adcca6c8209cfdd6fe",
"versionType": "git"
},
{
"status": "affected",
"version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
"lessThan": "e5cdb0c0a51e8ff49914ae16ef5360010c40cc85",
"versionType": "git"
},
{
"status": "affected",
"version": "0d0b660f214dc4905db7b6bc998bad0c16dfb1ba",
"lessThan": "63fa2d9c9c37020bd2703fe2a6a38027b5abeb15",
"versionType": "git"
}
],
"programFiles": [
"drivers/nvme/host/multipath.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/nvme/host/multipath.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98726
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48931 · Revision 1
- Added to Heist Feed
- Publisher date