High
Security advisory
There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-20546
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:25 UTC · Revision 1
Source evidence
There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.
osv:CVE-2018-20546
Complete source record
{
"id": "812d3befc6db1d82a3b1969871ac5b2c9de09597fc448aab56243b09b1711583",
"url": "https://osv.dev/vulnerability/CVE-2018-20546",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-20546",
"summary": "There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.",
"evidence": "osv:CVE-2018-20546",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2018-20546",
"aliases": [
"CVE-2018-20546"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/cacalabs/libcaca",
"type": "GIT",
"events": [
{
"introduced": "caae67dce5d72ceceac79468bed47b58ea8e4a29"
},
{
"last_affected": "caae67dce5d72ceceac79468bed47b58ea8e4a29"
},
{
"fixed": "1022d97496c7899e8641515af363381b31ae2f05"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:libcaca_project:libcaca:0.99:beta19:*:*:*:*:*:*",
"range": [
{
"introduced": "0.99-beta19"
},
{
"last_affected": "0.99-beta19"
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],
"source": "CPE_STRING"
},
{
"range": [
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],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
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"v0.99.beta19"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20546.json",
"vanir_signatures": [
{
"id": "CVE-2018-20546-16db8665",
"digest": {
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"line_hashes": [
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},
"source": "https://github.com/cacalabs/libcaca/commit/1022d97496c7899e8641515af363381b31ae2f05",
"target": {
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},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T13:28:59Z"
}
}
],
"modified": "2026-10-20T13:28:59.474106884Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WFGYICNTMNDNMDDUV4G2RYFB5HNJCOV/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PC7EGOEQ5C4OD66ZUJJIIYEXBTZOCMZX/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZSBCRN6EGQJUVOSD4OEEQ6XORHEM2CUL/",
"https://github.com/cacalabs/libcaca/issues/38",
"https://lists.debian.org/debian-lts-announce/2019/01/msg00007.html",
"https://usn.ubuntu.com/3860-1/",
"https://usn.ubuntu.com/3860-2/",
"https://bugzilla.redhat.com/show_bug.cgi?id=1652622",
"https://github.com/cacalabs/libcaca/commit/1022d97496c7899e8641515af363381b31ae2f05"
],
"provider_metadata": {
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"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*"
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"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
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"vendor_product": "debian:debian_linux",
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{
"range": [
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{
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"source": "CPE_STRING"
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},
{
"cpes": [
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"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
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},
{
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},
{
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{
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{
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{
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],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
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],
"vendor_product": "opensuse:leap",
"extracted_events": [
{
"range": [
{
"introduced": "15.0"
},
{
"last_affected": "15.0"
}
],
"source": "CPE_STRING"
}
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}
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}
},
"related_cves": [
{
"value": "CVE-2018-20546",
"evidence": "/id"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 387731,
"published_at": "2018-12-28T16:29:04.893+00:00"
}