Search criteria
4 vulnerabilities by rxi
CVE-2026-55738 (GCVE-0-2026-55738)
Vulnerability from cvelistv5 – Published: 2026-06-17 13:45 – Updated: 2026-06-17 15:00
VLAI?
Title
Stack Buffer Overflow in rxi/microtar raw_to_header() via non-null-terminated TAR name field
Summary
A stack-based buffer overflow exists in the raw_to_header() function in src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name and linkname fields of a TAR header with strcpy() without guaranteeing null termination of the source. The POSIX ustar format permits these fixed-width fields to be fully populated with non-null bytes, so a crafted archive whose linkname field (followed by the trailing padding of the 512-byte raw header) contains no null terminator causes strcpy() to read past the end of the 512-byte raw header stack buffer and to write past the destination header buffer. A remote attacker who supplies a crafted TAR archive that the victim opens or parses (via mtar_open(), mtar_read_header(), or mtar_find()) can cause an out-of-bounds read and a stack buffer overflow, resulting in denial of service (crash) and potentially arbitrary code execution. Confirmed with AddressSanitizer: stack-buffer-overflow READ of size 356 in raw_to_header at src/microtar.c:112.
Severity ?
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Credits
Saidakbarxon Maxsudxonov
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"value": "A stack-based buffer overflow exists in the raw_to_header() function in src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name and linkname fields of a TAR header with strcpy() without guaranteeing null termination of the source. The POSIX ustar format permits these fixed-width fields to be fully populated with non-null bytes, so a crafted archive whose linkname field (followed by the trailing padding of the 512-byte raw header) contains no null terminator causes strcpy() to read past the end of the 512-byte raw header stack buffer and to write past the destination header buffer. A remote attacker who supplies a crafted TAR archive that the victim opens or parses (via mtar_open(), mtar_read_header(), or mtar_find()) can cause an out-of-bounds read and a stack buffer overflow, resulting in denial of service (crash) and potentially arbitrary code execution. Confirmed with AddressSanitizer: stack-buffer-overflow READ of size 356 in raw_to_header at src/microtar.c:112."
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CVE-2026-54417 (GCVE-0-2026-54417)
Vulnerability from cvelistv5 – Published: 2026-06-17 13:25 – Updated: 2026-06-17 15:01
VLAI?
Title
Integer Overflow in rxi/microtar mtar_next() Causes Infinite Loop DoS
Summary
An integer overflow in the mtar_next() function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next() computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic. When the header size field is a multiple of 512 in the range 0xFFFFFC01-0xFFFFFE00 (e.g. 0xFFFFFE00), the addition wraps to 0, so mtar_next() seeks to the current record position instead of advancing. As a result, mtar_find() and any loop that iterates entries with mtar_next() repeat indefinitely over the same record, hanging the process at 100% CPU with no recovery.
Severity ?
CWE
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Credits
Saidakbarxon Maxsudxonov
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CVE-2026-43623 (GCVE-0-2026-43623)
Vulnerability from cvelistv5 – Published: 2026-06-01 18:04 – Updated: 2026-06-23 16:16 X_Open Source Unsupported When Assigned
VLAI?
Title
microtar 0.1.0 Stack-Based Buffer Overflow via raw_to_header()
Summary
microtar through 0.1.0 contains a stack-based buffer overflow vulnerability in the raw_to_header() function in src/microtar.c that allows attackers to corrupt adjacent stack memory by supplying a crafted TAR archive with non-null-terminated name or linkname fields. The function uses strcpy() to copy 100-byte ustar format fields that lack null terminators, causing writes of up to 355 bytes into a 100-byte destination buffer when mtar_open(), mtar_find(), or mtar_read_header() process attacker-supplied TAR archives.
Severity ?
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Credits
Byambadalai Sumiya (@ByamB4)
Saidakbarxon Maxsudxonov
mms (@3291710458)
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CVE-2026-4012 (GCVE-0-2026-4012)
Vulnerability from cvelistv5 – Published: 2026-03-12 07:32 – Updated: 2026-03-12 15:02
VLAI?
Title
rxi fe fe.c read_ out-of-bounds
Summary
A vulnerability was determined in rxi fe up to ed4cda96bd582cbb08520964ba627efb40f3dd91. The impacted element is the function read_ of the file src/fe.c. This manipulation with the input 1 causes out-of-bounds read. The attack requires local access. The exploit has been publicly disclosed and may be utilized. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The project was informed of the problem early through an issue report but has not responded yet.
Severity ?
Assigner
References
| URL | Tags | |||||||||||||||||||
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Credits
Oneafter (VulDB User)
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-4012",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-12T15:00:36.843907Z",
"version": "2.0.3"
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"providerMetadata": {
"dateUpdated": "2026-03-12T15:02:42.185Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "fe",
"vendor": "rxi",
"versions": [
{
"status": "affected",
"version": "ed4cda96bd582cbb08520964ba627efb40f3dd91"
}
]
}
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"credits": [
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"lang": "en",
"type": "reporter",
"value": "Oneafter (VulDB User)"
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],
"descriptions": [
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"lang": "en",
"value": "A vulnerability was determined in rxi fe up to ed4cda96bd582cbb08520964ba627efb40f3dd91. The impacted element is the function read_ of the file src/fe.c. This manipulation with the input 1 causes out-of-bounds read. The attack requires local access. The exploit has been publicly disclosed and may be utilized. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The project was informed of the problem early through an issue report but has not responded yet."
}
],
"metrics": [
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"cvssV4_0": {
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"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
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"version": "2.0"
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"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "Out-of-Bounds Read",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "Memory Corruption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-12T07:32:10.359Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-350534 | rxi fe fe.c read_ out-of-bounds",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.350534"
},
{
"name": "VDB-350534 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.350534"
},
{
"name": "Submit #769774 | rxi fe master-branch Out-of-Bounds Read",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.769774"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/rxi/fe/issues/34"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/oneafter/0211/blob/main/fe/repro"
},
{
"tags": [
"product"
],
"url": "https://github.com/rxi/fe/"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-03-11T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-03-11T01:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-03-11T20:10:48.000Z",
"value": "VulDB entry last update"
}
],
"title": "rxi fe fe.c read_ out-of-bounds"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-4012",
"datePublished": "2026-03-12T07:32:10.359Z",
"dateReserved": "2026-03-11T19:05:43.939Z",
"dateUpdated": "2026-03-12T15:02:42.185Z",
"state": "PUBLISHED"
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