RHSA-2026:36004
Vulnerability from csaf_redhat - Published: 2026-07-06 16:43 - Updated: 2026-07-07 18:57A flaw was found in giflib. A remote attacker can exploit a buffer overflow vulnerability in the EGifGCBToExtension function by providing a specially crafted Graphics Control Extension (GCE) block. This allows overwriting an existing GCE block without proper size validation, leading to a denial of service (DoS) on the system.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:28c99b2d96643b256e60bd76161d416a83ce0b2c2416ff4b0a2097f956f4a2bc_arm64 | — |
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| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:3ae4e369286f3cabc844fc3c37155b89bbe6d34e1a37d93559f0e221e911e197_amd64 | — |
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A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:28c99b2d96643b256e60bd76161d416a83ce0b2c2416ff4b0a2097f956f4a2bc_arm64 | — |
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| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:3ae4e369286f3cabc844fc3c37155b89bbe6d34e1a37d93559f0e221e911e197_amd64 | — |
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A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in merge_handshake_packet() where incoming handshake fragments are matched and merged based solely on handshake type, without validating that the message_length field remains consistent across all fragments of the same logical message. An attacker can exploit this by sending crafted DTLS fragments with conflicting message_length values, causing the implementation to allocate a buffer based on a smaller initial fragment and subsequently write beyond its bounds using larger, inconsistent fragments. Because the merge operation does not enforce proper bounds checking against the allocated buffer size, this results in an out-of-bounds write on the heap. The vulnerability is remotely exploitable without authentication via the DTLS handshake path and can lead to application crashes or potential memory corruption.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:28c99b2d96643b256e60bd76161d416a83ce0b2c2416ff4b0a2097f956f4a2bc_arm64 | — |
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| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:3ae4e369286f3cabc844fc3c37155b89bbe6d34e1a37d93559f0e221e911e197_amd64 | — |
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A flaw was found in Vim. A modeline is used to set specific editor options directly from a text file. However, the `complete`, `guitabtooltip`, `printheader` options and the `mapset` function lack proper security checks, allowing an attacker to bypass restrictions and cause arbitrary OS command execution.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:28c99b2d96643b256e60bd76161d416a83ce0b2c2416ff4b0a2097f956f4a2bc_arm64 | — |
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| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:3ae4e369286f3cabc844fc3c37155b89bbe6d34e1a37d93559f0e221e911e197_amd64 | — |
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A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:28c99b2d96643b256e60bd76161d416a83ce0b2c2416ff4b0a2097f956f4a2bc_arm64 | — |
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| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:3ae4e369286f3cabc844fc3c37155b89bbe6d34e1a37d93559f0e221e911e197_amd64 | — |
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A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:28c99b2d96643b256e60bd76161d416a83ce0b2c2416ff4b0a2097f956f4a2bc_arm64 | — |
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| Unresolved product id: Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:3ae4e369286f3cabc844fc3c37155b89bbe6d34e1a37d93559f0e221e911e197_amd64 | — |
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{
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"cwe": {
"id": "CWE-130",
"name": "Improper Handling of Length Parameter Inconsistency"
},
"discovery_date": "2026-03-24T05:38:09.899000+00:00",
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"system_name": "Red Hat Bugzilla ID",
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{
"category": "description",
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"title": "Vulnerability description"
},
{
"category": "summary",
"text": "gnutls: GnuTLS: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability should be classified as an important flaw rather than moderate because it exposes a pre-authentication, remotely reachable heap buffer overflow in the DTLS handshake processing path, which is part of the core protocol handling logic and commonly exposed in network-facing services. The flaw enables an attacker to inject controlled data at attacker-chosen offsets and sizes beyond allocated heap boundaries by exploiting inconsistent message_length handling across fragments, effectively creating a constrained but meaningful heap write primitive. Unlike benign memory safety bugs, this condition is deterministically triggerable with a small number of crafted packets and no environmental dependencies for denial-of-service, and it targets a long-lived parsing state where memory corruption can affect adjacent heap structures. Even if reliable code execution requires additional heap manipulation or layout knowledge, the combination of remote reachability, lack of authentication, controlled memory corruption capability, and trivial crashability significantly elevates the risk profile beyond moderate severity. In real-world deployments, such primitives are often sufficient to enable heap grooming and exploitation chains, particularly in services that repeatedly process attacker-controlled input, making this a materially important security flaw.",
"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"
}
],
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"title": "gnutls: GnuTLS: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly"
},
{
"cve": "CVE-2026-34982",
"cwe": {
"id": "CWE-78",
"name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
},
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"ids": [
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"text": "A flaw was found in Vim. A modeline is used to set specific editor options directly from a text file. However, the `complete`, `guitabtooltip`, `printheader` options and the `mapset` function lack proper security checks, allowing an attacker to bypass restrictions and cause arbitrary OS command execution.",
"title": "Vulnerability description"
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{
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"text": "vim: arbitrary command execution via modeline sandbox bypass",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "To exploit this vulnerability, an attacker needs to convince a user to open a specially crafted file. The arbitrary OS command execution is restricted to the privileges of the user running Vim, limiting the potential of a full system compromise.",
"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"
}
],
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"text": "A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.",
"title": "Vulnerability description"
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"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The impact for this flaw has been downgraded on Red Hat Enterprise Linux due to the following reason:\n\n- The number of elements passed to the vulnerable function at runtime is known and is at most 6 and the element size is sufficiently small. glibc\u2019s qsort implementation will not exercise the quick sort code path, which would otherwise cause an infloop or out-of-bound write.",
"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"
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"text": "A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest\u2013Shamir\u2013Adleman \u2013 Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.",
"title": "Vulnerability description"
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"title": "CVSS score applicability"
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"details": "For more information visit https://access.redhat.com/errata/RHSA-2026:36004",
"product_ids": [
"Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:28c99b2d96643b256e60bd76161d416a83ce0b2c2416ff4b0a2097f956f4a2bc_arm64",
"Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:3ae4e369286f3cabc844fc3c37155b89bbe6d34e1a37d93559f0e221e911e197_amd64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:36004"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
},
"products": [
"Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:28c99b2d96643b256e60bd76161d416a83ce0b2c2416ff4b0a2097f956f4a2bc_arm64",
"Red Hat AI Inference Server 3.2:registry.redhat.io/rhaiis/model-opt-cuda-rhel9@sha256:3ae4e369286f3cabc844fc3c37155b89bbe6d34e1a37d93559f0e221e911e197_amd64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "gnutls: gnutls: Authentication Bypass via NUL Character in Username"
}
]
}
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.