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scsi: qla2xxx: Fix soft lockup polling continuation IOCB signature

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix soft lockup polling continuation IOCB signature qla27xx_copy_multiple_pkt() and qla27xx_copy_fpin_pkt() poll rsp_q->ring_ptr->signature for RESPONSE_PROCESSED (0xDEADDEAD) to decide whether the next continuation IOCB has arrived, spinning on cpu_relax() without advancing the ring or decrementing the entry count while it has not. response_t::signature lives at byte offset 60, but a continuation IOCB (sts_cont_entry_t / struct sts_cont_entry_ext) carries raw FC frame payload at that offset (data[56..59]). A received frame whose payload bytes happen to equal 0xDEADDEAD is therefore misread as "not yet arrived", and the loop spins forever in interrupt/DPC context, causing a CPU soft lockup. The poll is also unnecessary: callers of qla27xx_copy_multiple_pkt() (PT_LS4_UNSOL and the NVMe purls path) already gate on qla_chk_cont_iocb_avail(), which guarantees all entry_count IOCBs are present before copying begins. The sibling helper __qla_copy_purex_to_buffer() already drops the signature poll and relies on the entry_type == STATUS_CONT_TYPE guard instead. Remove the signature busy-wait from both helpers, keeping the entry_type guard, and gate the FPIN path with qla_chk_cont_iocb_avail() so it defers and re-processes on the next interrupt once all continuation IOCBs have arrived, mirroring the ELS_AUTH_ELS and PT_LS4_UNSOL arms. With this the signature field is never read on a continuation IOCB, e

Announced Source revision 1
Original source ↗

CVE-2026-97530

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-2026-97530

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
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Prerequisites
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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": "9f2475fe7406b8ef5f97099c4980021344872d9f",
        "lessThan": "428e244dd4066abd40ca1ec525b7aab9a9db8296",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9f2475fe7406b8ef5f97099c4980021344872d9f",
        "lessThan": "3e58eb888ebf265af937f636d05997c60d2f197c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9f2475fe7406b8ef5f97099c4980021344872d9f",
        "lessThan": "6e6c2ba9022eb8f9b062c81bdc6fd24c7b4c4c16",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9f2475fe7406b8ef5f97099c4980021344872d9f",
        "lessThan": "6aa722fca9d2aa1f64094101587f8f4a2f83f6aa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9f2475fe7406b8ef5f97099c4980021344872d9f",
        "lessThan": "d7e3fa7d06bf7fcaac186d3c4d635caac166d36c",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/scsi/qla2xxx/qla_isr.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/scsi/qla2xxx/qla_isr.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-97530

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#48775 · Revision 1
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