CWE-367
AllowedTime-of-check Time-of-use (TOCTOU) Race Condition
Abstraction: Base · Status: Incomplete
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.
1286 vulnerabilities reference this CWE, most recent first.
GHSA-6FX5-5CW5-4897
Vulnerability from github – Published: 2026-02-23 22:16 – Updated: 2026-02-24 16:08A Time-of-Check-Time-of-Use (TOCTOU) race condition exists in Craft CMS’s token validation service for tokens that explicitly set a limited usage. The getTokenRoute() method reads a token’s usage count, checks if it’s within limits, then updates the database in separate non-atomic operations. By sending concurrent requests, an attacker can use a single-use impersonation token multiple times before the database update completes.
To make this work, an attacker needs to obtain a valid user account impersonation URL with a non-expired token via some other means and exploit a race condition while bypassing any rate-limiting rules in place.
For this to be a privilege escalation, the impersonation URL must include a token for a user account with more permissions than the current user.
References
https://github.com/craftcms/cms/commit/3e4afe18279951c024c64896aa2b93cda6d95fdf
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 4.16.18"
},
"package": {
"ecosystem": "Packagist",
"name": "craftcms/cms"
},
"ranges": [
{
"events": [
{
"introduced": "4.5.0-RC1"
},
{
"fixed": "4.16.19"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 5.8.22"
},
"package": {
"ecosystem": "Packagist",
"name": "craftcms/cms"
},
"ranges": [
{
"events": [
{
"introduced": "5.0.0-RC1"
},
{
"fixed": "5.8.23"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-27128"
],
"database_specific": {
"cwe_ids": [
"CWE-367"
],
"github_reviewed": true,
"github_reviewed_at": "2026-02-23T22:16:22Z",
"nvd_published_at": "2026-02-24T03:16:02Z",
"severity": "MODERATE"
},
"details": "A Time-of-Check-Time-of-Use (TOCTOU) race condition exists in Craft CMS\u2019s token validation service for tokens that explicitly set a limited usage. The `getTokenRoute()` method reads a token\u2019s usage count, checks if it\u2019s within limits, then updates the database in separate non-atomic operations. By sending concurrent requests, an attacker can use a single-use impersonation token multiple times before the database update completes.\n\nTo make this work, an attacker needs to obtain a valid user account impersonation URL with a non-expired token via some other means and exploit a race condition while bypassing any rate-limiting rules in place.\n\nFor this to be a privilege escalation, the impersonation URL must include a token for a user account with more permissions than the current user.\n\n## References\n\nhttps://github.com/craftcms/cms/commit/3e4afe18279951c024c64896aa2b93cda6d95fdf",
"id": "GHSA-6fx5-5cw5-4897",
"modified": "2026-02-24T16:08:48Z",
"published": "2026-02-23T22:16:22Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/craftcms/cms/security/advisories/GHSA-6fx5-5cw5-4897"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27128"
},
{
"type": "WEB",
"url": "https://github.com/craftcms/cms/commit/3e4afe18279951c024c64896aa2b93cda6d95fdf"
},
{
"type": "PACKAGE",
"url": "https://github.com/craftcms/cms"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Craft CMS Race condition in Token Service potentially allows for token usage greater than the token limit"
}
GHSA-6G8R-74QP-6859
Vulnerability from github – Published: 2026-04-22 18:31 – Updated: 2026-04-30 17:59A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the chcon utility of uutils coreutils during recursive operations. The implementation resolves recursive targets using a fresh path lookup (via fts_accpath) rather than binding the traversal and label application to the specific directory state encountered during traversal. Because these operations are not anchored to file descriptors, a local attacker with write access to a directory tree can exploit timing-sensitive rename or symbolic link races to redirect a privileged recursive relabeling operation to unintended files or directories. This vulnerability breaks the hardening expectations for SELinux administration workflows and can lead to the unauthorized modification of security labels on sensitive system objects.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "coreutils"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.8.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-35376"
],
"database_specific": {
"cwe_ids": [
"CWE-367"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-30T17:59:49Z",
"nvd_published_at": "2026-04-22T17:16:42Z",
"severity": "MODERATE"
},
"details": "A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the chcon utility of uutils coreutils during recursive operations. The implementation resolves recursive targets using a fresh path lookup (via fts_accpath) rather than binding the traversal and label application to the specific directory state encountered during traversal. Because these operations are not anchored to file descriptors, a local attacker with write access to a directory tree can exploit timing-sensitive rename or symbolic link races to redirect a privileged recursive relabeling operation to unintended files or directories. This vulnerability breaks the hardening expectations for SELinux administration workflows and can lead to the unauthorized modification of security labels on sensitive system objects.",
"id": "GHSA-6g8r-74qp-6859",
"modified": "2026-04-30T17:59:49Z",
"published": "2026-04-22T18:31:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35376"
},
{
"type": "WEB",
"url": "https://github.com/uutils/coreutils/pull/11402"
},
{
"type": "PACKAGE",
"url": "https://github.com/uutils/coreutils"
},
{
"type": "WEB",
"url": "https://github.com/uutils/coreutils/releases/tag/0.8.0"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
],
"summary": "uutils coreutils has a Time-of-check Time-of-use (TOCTOU) Race Condition"
}
GHSA-6GQR-HQJV-RG9M
Vulnerability from github – Published: 2024-03-13 21:31 – Updated: 2024-03-13 21:31Race condition in the installer for Zoom Rooms Client for Windows before version 5.17.5 may allow an authenticated user to conduct a denial of service via local access.
{
"affected": [],
"aliases": [
"CVE-2024-24692"
],
"database_specific": {
"cwe_ids": [
"CWE-367"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-13T20:15:07Z",
"severity": "MODERATE"
},
"details": "Race condition in the installer for Zoom Rooms Client for Windows before version 5.17.5 may allow an authenticated user to conduct a denial of service via local access.",
"id": "GHSA-6gqr-hqjv-rg9m",
"modified": "2024-03-13T21:31:02Z",
"published": "2024-03-13T21:31:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-24692"
},
{
"type": "WEB",
"url": "https://www.zoom.com/en/trust/security-bulletin/zsb-24009"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6HCP-X8FR-RWCV
Vulnerability from github – Published: 2025-04-03 09:32 – Updated: 2025-04-10 18:32In the Linux kernel, the following vulnerability has been resolved:
firmware: qcom: uefisecapp: fix efivars registration race
Since the conversion to using the TZ allocator, the efivars service is registered before the memory pool has been allocated, something which can lead to a NULL-pointer dereference in case of a racing EFI variable access.
Make sure that all resources have been set up before registering the efivars.
{
"affected": [],
"aliases": [
"CVE-2025-21998"
],
"database_specific": {
"cwe_ids": [
"CWE-367",
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-03T08:15:15Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: qcom: uefisecapp: fix efivars registration race\n\nSince the conversion to using the TZ allocator, the efivars service is\nregistered before the memory pool has been allocated, something which\ncan lead to a NULL-pointer dereference in case of a racing EFI variable\naccess.\n\nMake sure that all resources have been set up before registering the\nefivars.",
"id": "GHSA-6hcp-x8fr-rwcv",
"modified": "2025-04-10T18:32:01Z",
"published": "2025-04-03T09:32:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21998"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c4e37b381a7a243c298a4858fc0a5a74e737c79a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/da8d493a80993972c427002684d0742560f3be4a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f15a2b96a0e41c426c63a932d0e63cde7b9784aa"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6JGM-J7H2-2FQG
Vulnerability from github – Published: 2025-04-28 20:27 – Updated: 2025-05-05 21:58Issue
Snowflake discovered and remediated a vulnerability in the Go Snowflake Driver (“Driver”). When using the Easy Logging feature on Linux and macOS, the Driver didn’t correctly verify the permissions of the logging configuration file, potentially allowing an attacker with local access to overwrite the configuration and gain control over logging level and output location.
This vulnerability affects Driver versions from 1.7.0 up to, but not including, 1.13.3. Snowflake fixed the issue in version 1.13.3.
Vulnerability Details
When using the Easy Logging feature on Linux and macOS, the Driver reads logging configuration from a user-provided file. On Linux and macOS the Driver verifies that the configuration file can be written to only by its owner. That check was vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition and failed to verify that the file owner matches the user running the Driver. This could allow a local attacker with write access to the configuration file or the directory containing it to overwrite the configuration and gain control over logging level and output location.
Solution
Snowflake released version 1.13.3 of the Go Snowflake Driver, which fixes this issue. We recommend users upgrade to version 1.13.3.
Additional Information
If you discover a security vulnerability in one of our products or websites, please report the issue to Snowflake through our Vulnerability Disclosure Program hosted at HackerOne. For more information, please see our Vulnerability Disclosure Policy.
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/snowflakedb/gosnowflake"
},
"ranges": [
{
"events": [
{
"introduced": "1.7.0"
},
{
"fixed": "1.13.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-46327"
],
"database_specific": {
"cwe_ids": [
"CWE-367"
],
"github_reviewed": true,
"github_reviewed_at": "2025-04-28T20:27:29Z",
"nvd_published_at": "2025-04-28T23:15:44Z",
"severity": "LOW"
},
"details": "# Issue\nSnowflake discovered and remediated a vulnerability in the Go Snowflake Driver (\u201cDriver\u201d). When using the Easy Logging feature on Linux and macOS, the Driver didn\u2019t correctly verify the permissions of the logging configuration file, potentially allowing an attacker with local access to overwrite the configuration and gain control over logging level and output location.\n\nThis vulnerability affects Driver versions from 1.7.0 up to, but not including, 1.13.3. Snowflake fixed the issue in version 1.13.3.\n\n# Vulnerability Details\nWhen using the Easy Logging feature on Linux and macOS, the Driver reads logging configuration from a user-provided file. On Linux and macOS the Driver verifies that the configuration file can be written to only by its owner. That check was vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition and failed to verify that the file owner matches the user running the Driver. This could allow a local attacker with write access to the configuration file or the directory containing it to overwrite the configuration and gain control over logging level and output location.\n\n# Solution\nSnowflake released version 1.13.3 of the Go Snowflake Driver, which fixes this issue. We recommend users upgrade to version 1.13.3.\n\n# Additional Information\nIf you discover a security vulnerability in one of our products or websites, please report the issue to Snowflake through our Vulnerability Disclosure Program hosted at HackerOne. For more information, please see our [Vulnerability Disclosure Policy](https://hackerone.com/snowflake?type=team).",
"id": "GHSA-6jgm-j7h2-2fqg",
"modified": "2025-05-05T21:58:29Z",
"published": "2025-04-28T20:27:29Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/snowflakedb/gosnowflake/security/advisories/GHSA-6jgm-j7h2-2fqg"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-46327"
},
{
"type": "WEB",
"url": "https://github.com/snowflakedb/gosnowflake/commit/ba94a4800e23621eff558ef18ce4b96ec5489ff0"
},
{
"type": "PACKAGE",
"url": "https://github.com/snowflakedb/gosnowflake"
},
{
"type": "WEB",
"url": "https://pkg.go.dev/vuln/GO-2025-3650"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
],
"summary": "Go Snowflake Driver has race condition when checking access to Easy Logging configuration file"
}
GHSA-6JJ2-4Q5C-X8G6
Vulnerability from github – Published: 2026-06-19 20:46 – Updated: 2026-06-19 20:46Impact
CoreWCF NetNamedPipe transport accepts attach to a pre-existing named pipe instance, allowing local interception of NetNamedPipe traffic. NetNamedPipe creates a shared memory object based on the listening url, then generated a unique GUID for the named pipe it will be using and saves this to the shared memory object. Then it creates the named pipe to listen for clients. This requires an attacker to race the service and create the named pipe between the service publishing the GUID to the shared memory location (which the attacker needs to read) and the service creating the named pipe itself.
Patches
Fixed in CoreWCF v1.8.1 and v1.9.1
Workarounds
None
{
"affected": [
{
"package": {
"ecosystem": "NuGet",
"name": "CoreWCF.NetNamedPipe"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "NuGet",
"name": "CoreWCF.NetNamedPipe"
},
"ranges": [
{
"events": [
{
"introduced": "1.9.0"
},
{
"fixed": "1.9.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-54777"
],
"database_specific": {
"cwe_ids": [
"CWE-367",
"CWE-665"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-19T20:46:55Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "### Impact\nCoreWCF NetNamedPipe transport accepts attach to a pre-existing named pipe instance, allowing local interception of NetNamedPipe traffic. NetNamedPipe creates a shared memory object based on the listening url, then generated a unique GUID for the named pipe it will be using and saves this to the shared memory object. Then it creates the named pipe to listen for clients. This requires an attacker to race the service and create the named pipe between the service publishing the GUID to the shared memory location (which the attacker needs to read) and the service creating the named pipe itself.\n\n### Patches\nFixed in CoreWCF v1.8.1 and v1.9.1\n\n### Workarounds\nNone",
"id": "GHSA-6jj2-4q5c-x8g6",
"modified": "2026-06-19T20:46:55Z",
"published": "2026-06-19T20:46:55Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-6jj2-4q5c-x8g6"
},
{
"type": "PACKAGE",
"url": "https://github.com/CoreWCF/CoreWCF"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L",
"type": "CVSS_V3"
}
],
"summary": "CoreWCF NetNamedPipe transport accepts attach to a pre-existing named pipe instance"
}
GHSA-6JM2-4Q47-8GRP
Vulnerability from github – Published: 2026-08-25 21:31 – Updated: 2026-08-26 21:31Race condition in Editing in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to obtain sensitive information via a crafted HTML page. (Chromium security severity: Low)
{
"affected": [],
"aliases": [
"CVE-2026-79196"
],
"database_specific": {
"cwe_ids": [
"CWE-367"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-25T21:18:13Z",
"severity": "MODERATE"
},
"details": "Race condition in Editing in Google Chrome prior to 152.0.7977.65 allowed a remote attacker leveraging social engineering to obtain sensitive information via a crafted HTML page. (Chromium security severity: Low)",
"id": "GHSA-6jm2-4q47-8grp",
"modified": "2026-08-26T21:31:39Z",
"published": "2026-08-25T21:31:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79196"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/502252964"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6M3V-59WP-4J9Q
Vulnerability from github – Published: 2026-08-25 21:31 – Updated: 2026-08-26 21:31Race condition in Extensions in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass system access restrictions via a crafted Chrome extension. (Chromium security severity: Low)
{
"affected": [],
"aliases": [
"CVE-2026-79017"
],
"database_specific": {
"cwe_ids": [
"CWE-367"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-25T21:17:57Z",
"severity": "MODERATE"
},
"details": "Race condition in Extensions in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass system access restrictions via a crafted Chrome extension. (Chromium security severity: Low)",
"id": "GHSA-6m3v-59wp-4j9q",
"modified": "2026-08-26T21:31:33Z",
"published": "2026-08-25T21:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79017"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html"
},
{
"type": "WEB",
"url": "https://issues.chromium.org/issues/533021205"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-6MM6-M775-CHPM
Vulnerability from github – Published: 2026-05-20 15:35 – Updated: 2026-06-30 03:36Undefined behavior may result due to a race condition leading to a use-after-free violation. If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature. If, during that validation, the "recursive-clients" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.
{
"affected": [],
"aliases": [
"CVE-2026-5947"
],
"database_specific": {
"cwe_ids": [
"CWE-362",
"CWE-367"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-20T13:16:40Z",
"severity": "HIGH"
},
"details": "Undefined behavior may result due to a race condition leading to a use-after-free violation. If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature. If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.",
"id": "GHSA-6mm6-m775-chpm",
"modified": "2026-06-30T03:36:45Z",
"published": "2026-05-20T15:35:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5947"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:7412"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-5947"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479772"
},
{
"type": "WEB",
"url": "https://downloads.isc.org/isc/bind9/9.20.23"
},
{
"type": "WEB",
"url": "https://downloads.isc.org/isc/bind9/9.21.22"
},
{
"type": "WEB",
"url": "https://kb.isc.org/docs/cve-2026-5947"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5947.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-6PJG-WMM6-R8RP
Vulnerability from github – Published: 2026-06-13 03:30 – Updated: 2026-08-12 18:30A time-of-check time-of-use (TOCTOU) race condition was found in the abrt-dbus D-Bus service's SetElement method. Between dump directory creation and post-create event execution, any local user can call SetElement to write arbitrary text files into the root-owned dump directory, bypassing package validation and allowing crashes of unpackaged binaries to survive post-create processing.
{
"affected": [],
"aliases": [
"CVE-2026-54228"
],
"database_specific": {
"cwe_ids": [
"CWE-367"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-13T03:16:21Z",
"severity": "HIGH"
},
"details": "A time-of-check time-of-use (TOCTOU) race condition was found in the abrt-dbus D-Bus service\u0027s SetElement method. Between dump directory creation and post-create event execution, any local user can call SetElement to write arbitrary text files into the root-owned dump directory, bypassing package validation and allowing crashes of unpackaged binaries to survive post-create processing.",
"id": "GHSA-6pjg-wmm6-r8rp",
"modified": "2026-08-12T18:30:59Z",
"published": "2026-06-13T03:30:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54228"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:48819"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:48864"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:48865"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:48866"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:54272"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-54228"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488531"
},
{
"type": "WEB",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54228.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
The most basic advice for TOCTOU vulnerabilities is to not perform a check before the use. This does not resolve the underlying issue of the execution of a function on a resource whose state and identity cannot be assured, but it does help to limit the false sense of security given by the check.
Mitigation
When the file being altered is owned by the current user and group, set the effective gid and uid to that of the current user and group when executing this statement.
Mitigation
Limit the interleaving of operations on files from multiple processes.
Mitigation
If you cannot perform operations atomically and you must share access to the resource between multiple processes or threads, then try to limit the amount of time (CPU cycles) between the check and use of the resource. This will not fix the problem, but it could make it more difficult for an attack to succeed.
Mitigation
Recheck the resource after the use call to verify that the action was taken appropriately.
Mitigation
Ensure that some environmental locking mechanism can be used to protect resources effectively.
Mitigation
Ensure that locking occurs before the check, as opposed to afterwards, such that the resource, as checked, is the same as it is when in use.
CAPEC-27: Leveraging Race Conditions via Symbolic Links
This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to them. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file they will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.
CAPEC-29: Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.