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CVE-2026-72155 (GCVE-0-2026-72155)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:53 – Updated: 2026-08-23 12:46
VLAI
Title
mtd: spi-nor: swp: Improve locking user experience
Summary
In the Linux kernel, the following vulnerability has been resolved: mtd: spi-nor: swp: Improve locking user experience In the case of the first block being locked (or the few first blocks), if the user want to fully unlock the device it has two possibilities: - either it asks to unlock the entire device, and this works; - or it asks to unlock just the block(s) that are currently locked, which fails. It fails because the conditions "can_be_top" and "can_be_bottom" are true. Indeed, in this case, we unlock everything, so the TB bit does not matter. However in the current implementation, use_top would be true (as this is the favourite option) and lock_len, which in practice should be reduced down to 0, is set to "nor->params->size - (ofs + len)" which is a positive number. This is wrong. An easy way is to simply add an extra condition. In the unlock() path, if we can achieve the same result from both sides, it means we unlock everything and lock_len must simply be 0. A comment is added to clarify that logic.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3dd8012a8eeb3702fa17450ec1a16a3f38af138d , < 23c285be8f6fcde9088fe12bb69c701d46696be1 (git)
Affected: 3dd8012a8eeb3702fa17450ec1a16a3f38af138d , < a6fd2145c73b80bb6a5eed7355a4f63597d712d9 (git)
Affected: 3dd8012a8eeb3702fa17450ec1a16a3f38af138d , < 9a0d8dec3d11ca95d67537ea8fa6ee2730a5038a (git)
Affected: 3dd8012a8eeb3702fa17450ec1a16a3f38af138d , < dc341272cf8e15a2c511db3c4df5dab8adf70ad0 (git)
Affected: 3dd8012a8eeb3702fa17450ec1a16a3f38af138d , < 6110ab5ffd84e8daa654652446a03ce2f77580a7 (git)
Affected: 3dd8012a8eeb3702fa17450ec1a16a3f38af138d , < c0806df5cf806545160f3fdac3c888926ceac557 (git)
Affected: 3dd8012a8eeb3702fa17450ec1a16a3f38af138d , < 12d4d69221159e6d0e72400ec81195d691169b53 (git)
Affected: 3dd8012a8eeb3702fa17450ec1a16a3f38af138d , < e1d456b26bf23e30db305a6184e8abd9ab68bbf2 (git)
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Linux Linux Affected: 4.6
Unaffected: 0 , < 4.6 (semver)
Unaffected: 5.10.266 , ≤ 5.10.* (semver)
Unaffected: 5.15.217 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "dateReserved": "2026-08-09T03:40:39.909Z",
    "dateUpdated": "2026-08-23T12:46:54.916Z",
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However in the current implementation, use_top would be true (as\\nthis is the favourite option) and lock_len, which in practice should be\\nreduced down to 0, is set to \\\"nor-\u003eparams-\u003esize - (ofs + len)\\\" which is\\na positive number. This is wrong.\\n\\nAn easy way is to simply add an extra condition. In the unlock() path,\\nif we can achieve the same result from both sides, it means we unlock\\neverything and lock_len must simply be 0. 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-19T05:26:34+00:00",
      "cve": "CVE-2026-72155",
      "id": "CVE-2026-72155",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mtd: spi-nor: swp: Improve locking user experience",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72155.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.