nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing
In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix use of uninitialized memory in CORE_INIT_RSP parsing nci_core_init_rsp_packet_v1() and nci_core_init_rsp_packet_v2() parse the CORE_INIT_RSP packet without validating that the skb contains enough data. A malformed response (e.g. injected via virtual_ncidev) can declare a large num_supported_rf_interfaces while providing insufficient data, causing reads of uninitialized slab memory. This is later used in nci_init_complete_req(), triggering a KMSAN uninit-value warning. Add skb length checks before accessing packet fields: - Validate the skb has at least 1 byte for the status field. - Validate the skb can hold the fixed-size header before parsing. - In v2, bounds-check each variable-length rf_interface entry and its extension parameters within the parsing loop. - In v1, verify the skb is large enough for both the variable-length rf_interfaces array and the trailing rsp_2 structure.
CVE-2026-90221
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-2026-90221
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": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
"lessThan": "baed3fdf6ed2195c56f25ae18a086b938dcd3983",
"versionType": "git"
},
{
"status": "affected",
"version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
"lessThan": "2f434478771a4ebdd535033561c0590bcde39753",
"versionType": "git"
},
{
"status": "affected",
"version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
"lessThan": "5487f04c1ccbfa15aa6e531eb1ec9c9ec9c7bf31",
"versionType": "git"
},
{
"status": "affected",
"version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
"lessThan": "bbe68e8249e2c76d65adfd9224fa95f1ca0fbe4e",
"versionType": "git"
},
{
"status": "affected",
"version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
"lessThan": "4f0483bbcdaccc9d4aee30df7351863334cecfa7",
"versionType": "git"
},
{
"status": "affected",
"version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
"lessThan": "7d44b897bff84edcd4814899314d661ad4956a8e",
"versionType": "git"
},
{
"status": "affected",
"version": "bcd684aace34fedbd473fbd9b21ed06b0c2d2212",
"lessThan": "d56575a2595ee1f597f39e8a1cfb67ed3501678d",
"versionType": "git"
}
],
"programFiles": [
"net/nfc/nci/rsp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/nfc/nci/rsp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90221
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36592 · Revision 1
- Added to Heist Feed
- Publisher date