RHSA-2026:40041
Vulnerability from csaf_redhat - Published: 2026-07-15 14:28 - Updated: 2026-08-05 06:41Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Moderate
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
gawk:
* gawk-5.4.0-3.1.hum1 (aarch64, x86_64)
* gawk-all-langpacks-5.4.0-3.1.hum1 (aarch64, x86_64)
* gawk-devel-5.4.0-3.1.hum1 (aarch64, x86_64)
* gawk-doc-5.4.0-3.1.hum1 (noarch)
* gawk-5.4.0-3.1.hum1.src (src)
Security Fix(es):
gawk:
* CVE-2026-40553
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in gawk. A Use After Free vulnerability exists in the do_getline_redir() routine within the io.c program file. This vulnerability can be triggered by an attacker, potentially leading to a system crash and causing a Denial of Service (DoS).
4.0 (Medium)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:gawk-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in gawk. An integer overflow vulnerability could allow a local attacker to cause memory exhaustion, leading to a denial of service. This flaw may also enable an attacker to corrupt gawk's internal memory, potentially leading to system instability.
4.4 (Medium)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:gawk-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in gawk. An integer overflow vulnerability exists in the `do_sub()` routine, which could allow an attacker to overwrite internal program data. This can lead to a denial of service (DoS) by causing the gawk program to crash. This issue affects 32-bit builds of gawk.
CWE-190 - Integer Overflow or WraparoundAffected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:gawk-main@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@src | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Moderate
A flaw was found in gawk. A buffer overflow vulnerability exists in the `ftype()` routine, located in the `extension/readdir.c` program file. This vulnerability could allow an attacker to crash the program, resulting in a denial of service. It may also potentially lead to arbitrary code execution, though this has not been definitively confirmed.
6.2 (Medium)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:gawk-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:gawk-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
References
29 references
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"title": "Vulnerability description"
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"title": "gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c"
},
{
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},
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"ids": [
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}
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"notes": [
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"text": "A flaw was found in gawk. An integer overflow vulnerability could allow a local attacker to cause memory exhaustion, leading to a denial of service. This flaw may also enable an attacker to corrupt gawk\u0027s internal memory, potentially leading to system instability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "gawk: gawk: Memory corruption via integer overflow",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Moderate: An integer overflow vulnerability in gawk\u0027s builtin.c could allow a local attacker to cause memory exhaustion and overwrite heap metadata. This could lead to system instability or a denial of service on affected Red Hat products, requiring local access to execute a malicious gawk script.",
"title": "Statement"
},
{
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"title": "CVSS score applicability"
}
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"product_ids": [
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"scores": [
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"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 4.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L",
"version": "3.1"
},
"products": [
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"Red Hat Hardened Images:gawk-main@noarch",
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"Red Hat Hardened Images:gawk-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "gawk: gawk: Memory corruption via integer overflow"
},
{
"cve": "CVE-2026-40469",
"cwe": {
"id": "CWE-190",
"name": "Integer Overflow or Wraparound"
},
"discovery_date": "2026-07-13T13:01:26.529702+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
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"notes": [
{
"category": "description",
"text": "A flaw was found in gawk. An integer overflow vulnerability exists in the `do_sub()` routine, which could allow an attacker to overwrite internal program data. This can lead to a denial of service (DoS) by causing the gawk program to crash. This issue affects 32-bit builds of gawk.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "gawk: gawk: Denial of Service due to integer overflow",
"title": "Vulnerability summary"
},
{
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"text": "This vulnerability is only present in 32-bit builds of gawk, which are not provided for Red Hat CoreOS, Red Hat Enterprise Linux versions 7 and later.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat Hardened Images:gawk-main@aarch64",
"Red Hat Hardened Images:gawk-main@noarch",
"Red Hat Hardened Images:gawk-main@src",
"Red Hat Hardened Images:gawk-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-40469"
},
{
"category": "external",
"summary": "RHBZ#2499656",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2499656"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-40469",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40469"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-40469",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40469"
},
{
"category": "external",
"summary": "https://cert.pl/en/posts/2026/07/CVE-2026-40467",
"url": "https://cert.pl/en/posts/2026/07/CVE-2026-40467"
},
{
"category": "external",
"summary": "https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=ae1b2d508f46913269a9e62aceda3636afe8147b",
"url": "https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=ae1b2d508f46913269a9e62aceda3636afe8147b"
}
],
"release_date": "2026-07-13T12:07:55.692000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-15T14:28:58+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
"Red Hat Hardened Images:gawk-main@aarch64",
"Red Hat Hardened Images:gawk-main@noarch",
"Red Hat Hardened Images:gawk-main@src",
"Red Hat Hardened Images:gawk-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:40041"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 2.8,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:gawk-main@aarch64",
"Red Hat Hardened Images:gawk-main@noarch",
"Red Hat Hardened Images:gawk-main@src",
"Red Hat Hardened Images:gawk-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "gawk: gawk: Denial of Service due to integer overflow"
},
{
"cve": "CVE-2026-40553",
"cwe": {
"id": "CWE-121",
"name": "Stack-based Buffer Overflow"
},
"discovery_date": "2026-07-13T13:01:32.299484+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2499657"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in gawk. A buffer overflow vulnerability exists in the `ftype()` routine, located in the `extension/readdir.c` program file. This vulnerability could allow an attacker to crash the program, resulting in a denial of service. It may also potentially lead to arbitrary code execution, though this has not been definitively confirmed.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "gawk: Gawk: Buffer overflow in ftype() routine may lead to code execution or denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Moderate: A buffer overflow in gawk\u0027s `ftype()` routine, when processing untrusted input, could lead to a denial of service or potentially arbitrary code execution. This is rated Moderate as successful exploitation requires user interaction, such as processing a specially crafted file.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat Hardened Images:gawk-main@aarch64",
"Red Hat Hardened Images:gawk-main@noarch",
"Red Hat Hardened Images:gawk-main@src",
"Red Hat Hardened Images:gawk-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-40553"
},
{
"category": "external",
"summary": "RHBZ#2499657",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2499657"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-40553",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40553"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-40553",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40553"
},
{
"category": "external",
"summary": "https://cert.pl/en/posts/2026/07/CVE-2026-40467",
"url": "https://cert.pl/en/posts/2026/07/CVE-2026-40467"
},
{
"category": "external",
"summary": "https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=cca0366144336b49aaa7d5d949966ce8e2c70843",
"url": "https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=cca0366144336b49aaa7d5d949966ce8e2c70843"
}
],
"release_date": "2026-07-13T12:07:56.611000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-15T14:28:58+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
"Red Hat Hardened Images:gawk-main@aarch64",
"Red Hat Hardened Images:gawk-main@noarch",
"Red Hat Hardened Images:gawk-main@src",
"Red Hat Hardened Images:gawk-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:40041"
},
{
"category": "workaround",
"details": "Do not run gawk against untrusted scripts, files, or directories to prevent triggering these vulnerabilities. If an attack is attempted, Red Hat\u0027s built-in memory protections will safely crash the program, preventing malicious code execution.",
"product_ids": [
"Red Hat Hardened Images:gawk-main@aarch64",
"Red Hat Hardened Images:gawk-main@noarch",
"Red Hat Hardened Images:gawk-main@src",
"Red Hat Hardened Images:gawk-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 6.2,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:gawk-main@aarch64",
"Red Hat Hardened Images:gawk-main@noarch",
"Red Hat Hardened Images:gawk-main@src",
"Red Hat Hardened Images:gawk-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "gawk: Gawk: Buffer overflow in ftype() routine may lead to code execution or denial of service"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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