RHSA-2026:49661
Vulnerability from csaf_redhat - Published: 2026-08-03 11:00 - Updated: 2026-09-01 14:53Summary
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-5.4.1-1.hum1 (aarch64, x86_64)
* gawk-all-langpacks-5.4.1-1.hum1 (aarch64, x86_64)
* gawk-devel-5.4.1-1.hum1 (aarch64, x86_64)
* gawk-doc-5.4.1-1.hum1 (noarch)
* gawk-5.4.1-1.hum1.src (src)
Security Fix(es):
gawk:
* CVE-2026-40467
* CVE-2026-40468
* CVE-2026-40469
* 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
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. 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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"scope": "UNCHANGED",
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"Red Hat Hardened Images:gawk-main@noarch",
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"Red Hat Hardened Images:gawk-main@x86_64"
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"details": "Moderate"
}
],
"title": "gawk: gawk: Denial of Service due to Use After Free vulnerability in io.c"
},
{
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"ids": [
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"notes": [
{
"category": "description",
"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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"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"
}
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"Red Hat Hardened Images:gawk-main@noarch",
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"Red Hat Hardened Images:gawk-main@x86_64"
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"product_ids": [
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"scores": [
{
"cvss_v3": {
"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": [
"Red Hat Hardened Images:gawk-main@aarch64",
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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": "2026-08-03T11:00:01+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-2026:49661"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"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": "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": "2026-08-03T11:00:01+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-2026:49661"
},
{
"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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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