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CVE-2026-45914 (GCVE-0-2026-45914)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:17 – Updated: 2026-05-27 12:17
VLAI
Title
Revert "hwmon: (ibmpex) fix use-after-free in high/low store"
Summary
In the Linux kernel, the following vulnerability has been resolved: Revert "hwmon: (ibmpex) fix use-after-free in high/low store" This reverts commit 6946c726c3f4c36f0f049e6f97e88c510b15f65d. Jean Delvare points out that the patch does not completely fix the reported problem, that it in fact introduces a (new) race condition, and that it may actually not be needed in the first place. Various AI reviews agree. Specific and relevant AI feedback: " This reordering sets the driver data to NULL before removing the sensor attributes in the loop below. ibmpex_show_sensor() retrieves this driver data via dev_get_drvdata() but does not check if it is NULL before dereferencing it to access data->sensors[]. If a userspace process reads a sensor file (like temp1_input) while this delete function is running, could it race with the dev_set_drvdata(..., NULL) call here and crash in ibmpex_show_sensor()? Would it be safer to keep the original order where device_remove_file() is called before clearing the driver data? device_remove_file() should wait for any active sysfs callbacks to complete, which might already prevent the use-after-free this patch intends to fix. " Revert the offending patch. If it can be shown that the originally reported alleged race condition does indeed exist, it can always be re-introduced with a complete fix.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3ce9b7ae9d4d148672b35147aaf7987a4f82bb94 , < 05112ba67c824ab416cd54307c0b50aba9f0047a (git)
Affected: 533ead425f8109b02fecc7e72d612b8898ec347a , < efd68429f23fb4015b0ebc2392334059e06fad18 (git)
Affected: fa37adcf1d564ef58b9dfb01b6c36d35c5294bad , < f448acd86835a650f9ea83460b9ca347d3aafba5 (git)
Affected: 68d62e5bebbd118b763e8bb210d5cf2198ef450c , < 914b47c9b824d3d74f31c764163edf93302100b1 (git)
Affected: 5aa2139201667c1f644601e4529c4acd6bf8db5a , < 14a38784e09aebc21207dc32fffa05247fc3dd64 (git)
Affected: 6946c726c3f4c36f0f049e6f97e88c510b15f65d , < 894d9c7aab68fd0c70c78b1d03c8fa589fb0f67d (git)
Affected: 6946c726c3f4c36f0f049e6f97e88c510b15f65d , < 8bde3e395a85017f12af2b0ba5c3684f5af9c006 (git)
Affected: 5.10.248 , < 5.10.252 (semver)
Affected: 6.1.160 , < 6.1.165 (semver)
Affected: 6.6.120 , < 6.6.128 (semver)
Affected: 6.12.64 , < 6.12.75 (semver)
Affected: 6.18.3 , < 6.18.14 (semver)
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Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-27T06:51:06+00:00",
      "cve": "CVE-2026-45914",
      "id": "CVE-2026-45914",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Revert \"hwmon: (ibmpex) fix use-after-free in high/low store\"",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45914.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T16:59:15Z",
      "cve": "CVE-2026-45914",
      "id": "CVE-2026-45914",
      "initial_release_date": "2026-05-28T03:56:18Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "326",
      "product_status:recommended": "105",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-45914",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45914.json",
      "version": "11"
    }
  }
}