CVE-2026-19499VulnerabilityPublished 29 Aug 2026Updated 8 Oct 2026

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

Authoritative record:CVE-2026-19499· High 7.7

Not known to be exploited · CVSS 7.7 High.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 3.1 base score

7.7High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:H

Attack Vector: Network
Attack Complexity: High
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: Low
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 14 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
The GNU C Libraryglibc	Affected >=2.38 <=2.44	Fixed in–

Description

This update includes the following RPMs: glibc: * compat-libpthread-nonshared-2.43-8.3.hum1 (aarch64, x86_64) * glibc-2.43-8.3.hum1 (aarch64, x86_64) * glibc-all-langpacks-2.43-8.3.hum1 (aarch64, x86_64) * glibc-benchtests-2.43-8.3.hum1 (aarch64, x86_64) * glibc-common-2.43-8.3.hum1 (aarch64, x86_64) * glibc-devel-2.43-8.3.hum1 (aarch64, x86_64) * glibc-doc-2.43-8.3.hum1 (noarch) * glibc-gconv-extra-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-aa-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-af-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-agr-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ak-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-am-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-an-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-anp-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ar-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-as-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ast-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ayc-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-az-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-be-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-bem-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ber-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-bg-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-bhb-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-bho-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-bi-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-bn-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-bo-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-br-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-brx-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-bs-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-byn-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ca-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ce-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-chr-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ckb-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-cmn-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-crh-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-cs-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-csb-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-cv-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-cy-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-da-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-de-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-doi-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-dsb-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-dv-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-dz-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-el-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-en-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-eo-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-es-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-et-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-eu-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-fa-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ff-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-fi-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-fil-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-fo-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-fr-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-fur-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-fy-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ga-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-gbm-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-gd-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-gez-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-gl-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-gu-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-gv-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ha-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-hak-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-he-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-hi-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-hif-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-hne-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-hr-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-hsb-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ht-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-hu-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-hy-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ia-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-id-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ig-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ik-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-is-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-it-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-iu-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ja-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-ka-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-kab-2.43-8.3.hum1 (aarch64, x86_64) * glibc-langpack-kk-2.43-8.3.hum1 (aar

CWE-122Heap-based Buffer Overflow (opens in a new tab)
Variant weaknessLikelihood of exploit: HighCWE Top 25 (2025): #16
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Pre-design: Use a language or compiler that performs automatic bounds checking.
Architecture and Design
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Forced Integer Overflow (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

WeaknessesCWE-122

Technical details

References

Community reviews

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