linux — security advisory
An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.
- Products
- linux
- Affected versions
- Not specified
- Fixed versions
- 5.9.15-1
- CVEs
- CVE-2020-28588
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:27 UTC · Revision 1
Source evidence
An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.
osv:DEBIAN-CVE-2020-28588
linux
Fixed versions: 5.9.15-1
linux
Fixed versions: 5.9.15-1
linux
Fixed versions: 5.9.15-1
Complete source record
{
"id": "869791069c9a686dd34739a45109df8d383ca8e937fbca854c91b7f6e871b975",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-28588",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2020-28588",
"summary": "An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.",
"evidence": "osv:DEBIAN-CVE-2020-28588",
"products": [
{
"name": {
"value": "linux",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.9.15-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
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{
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"affected_versions": []
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],
"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
}
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"affected": [
{
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],
"package": {
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"purl": "pkg:deb/debian/linux?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
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},
"ecosystem_specific": {
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{
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],
"package": {
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"purl": "pkg:deb/debian/linux?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-28588.json"
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"ecosystem_specific": {
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{
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"package": {
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"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-28588.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:00:11.029687320Z",
"provider": "osv",
"upstream": [
"CVE-2020-28588"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2020-28588"
]
},
"related_cves": [
{
"value": "CVE-2020-28588",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 451018,
"published_at": "2021-05-10T19:15:08.017+00:00"
}