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nfc: llcp: fix slab-out-of-bounds reads when logging service names

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: nfc: llcp: fix slab-out-of-bounds reads when logging service names nfc_llcp_wks_sap() and nfc_llcp_build_sdreq_tlv() pass non-null- terminated strings to pr_debug() using the %s format specifier. The buffers are allocated via kmemdup() or come from netlink attributes and are not guaranteed to be null-terminated, causing __dynamic_pr_debug() to read beyond the allocated region: KASAN: slab-out-of-bounds Read in __dynamic_pr_debug Fix both call sites by using %.*s with the explicit length to limit the output to the actual length of the string.

Announced Source revision 1
Original source ↗

CVE-2026-98576

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-2026-98576

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": "d9b8d8e19b073096d3609bbd60f82148d128b555",
        "lessThan": "75f7c5a42fa1483f5912279a749417c284ad708f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d9b8d8e19b073096d3609bbd60f82148d128b555",
        "lessThan": "6d4ca872830e46fcca9c086bf19fa9bd2faf09d2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d9b8d8e19b073096d3609bbd60f82148d128b555",
        "lessThan": "a143f7835faa4fe0178448289feea4f84eeee8d6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d9b8d8e19b073096d3609bbd60f82148d128b555",
        "lessThan": "75bfd9ef4da2fb49dac1f19880d2ac4ccd07b45b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d9b8d8e19b073096d3609bbd60f82148d128b555",
        "lessThan": "8afb6c194f5781798d3ab3edf243cf5a24a9d1f9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d9b8d8e19b073096d3609bbd60f82148d128b555",
        "lessThan": "8978dff632519712d1fa432991e1f2e857f90239",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d9b8d8e19b073096d3609bbd60f82148d128b555",
        "lessThan": "4262b12277a3e056c95fc49e9c4d7bd97035d16c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d9b8d8e19b073096d3609bbd60f82148d128b555",
        "lessThan": "7dcf371a35632f035baf77bcf2c129165f772ce4",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/nfc/llcp_commands.c",
      "net/nfc/llcp_core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.55",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/nfc/llcp_commands.c",
      "net/nfc/llcp_core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98576

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38596 · Revision 1
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Publisher date
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