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lib: cpu_rmap: Avoid use after free on rmap->obj array entries

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: lib: cpu_rmap: Avoid use after free on rmap->obj array entries When calling irq_set_affinity_notifier() with NULL at the notify argument, it will cause freeing of the glue pointer in the corresponding array entry but will leave the pointer in the array. A subsequent call to free_irq_cpu_rmap() will try to free this entry again leading to possible use after free. Fix that by setting NULL to the array entry and checking that we have non-zero at the array entry when iterating over the array in free_irq_cpu_rmap(). The current code does not suffer from this since there are no cases where irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the notify arg) is called, followed by a call to free_irq_cpu_rmap() so we don't hit and issue. Subsequent patches in this series excersize this flow, hence the required fix.

Announced Source revision 1
Original source ↗

CVE-2023-53484

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-2023-53484

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": "896f97ea95c1d29c0520ee0766b66b7f64cb967c",
        "lessThan": "981f339d2905b6a92ef59358158b326493aecac5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "896f97ea95c1d29c0520ee0766b66b7f64cb967c",
        "lessThan": "d1308bd0b24cb1d78fa2747d5fa3e055cc628a48",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "896f97ea95c1d29c0520ee0766b66b7f64cb967c",
        "lessThan": "cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "896f97ea95c1d29c0520ee0766b66b7f64cb967c",
        "lessThan": "f748e15253833b771acbede14ea98f50831ac289",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "c6ed54dd90698dc0744d669524cc1c122ded8a16",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "896f97ea95c1d29c0520ee0766b66b7f64cb967c",
        "lessThan": "c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "67bca5f1d644f4e79b694abd8052a177de81c37f",
        "versionType": "git"
      },
      {
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        "lessThan": "4e0473f1060aa49621d40a113afde24818101d37",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "lib/cpu_rmap.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.8"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.8",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "4.14.316",
        "versionType": "semver",
        "lessThanOrEqual": "4.14.*"
      },
      {
        "status": "unaffected",
        "version": "4.19.284",
        "versionType": "semver",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.244",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.181",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.113",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.30",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.3.4",
        "versionType": "semver",
        "lessThanOrEqual": "6.3.*"
      },
      {
        "status": "unaffected",
        "version": "6.4",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "lib/cpu_rmap.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2023-53484

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#30271 · Revision 1
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Publisher date
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