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Security update for busybox

Type: advisorySources: OSV

This update for busybox fixes the following issues: - CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted `ClientKeyExchange` message (bsc#1282575). - CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550). - CVE-2026-88832: romfs volume ID parsing uses unbounded `strlen` on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576). - CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551). - CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552). - CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568). - CVE-2026-88841: OOB read and silent memory corruption of the status file due to `write_status_file()` failing to reset the `field_start` cursor between package stanzas (bsc#1282653).

Products
busybox
Affected versions
Not specified
Fixed versions
1.35.0-10.12.1
CVEs
CVE-2026-88830, CVE-2026-88831, CVE-2026-88832, CVE-2026-88835, CVE-2026-88837, CVE-2026-88839, CVE-2026-88841
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 14:11 UTC · Revision 1

Source evidence

Security update for busybox

core-osv · Original source

Published 20 Oct 2026, 17:58 UTC

This update for busybox fixes the following issues: - CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted `ClientKeyExchange` message (bsc#1282575). - CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550). - CVE-2026-88832: romfs volume ID parsing uses unbounded `strlen` on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576). - CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551). - CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552). - CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568). - CVE-2026-88841: OOB read and silent memory corruption of the status file due to `write_status_file()` failing to reset the `field_start` cursor between package stanzas (bsc#1282653).

osv:SUSE-SU-2026:4773-1

busybox

Fixed versions: 1.35.0-10.12.1

busybox

Fixed versions: 1.35.0-10.12.1

Complete source record
{
  "id": "bab6b7adb3b6a2c9ff6f234cb600f547d4a3f40de86b5f7d27fc9920a548afbd",
  "url": "https://osv.dev/vulnerability/SUSE-SU-2026%3A4773-1",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Security update for busybox",
    "summary": "This update for busybox fixes the following issues: - CVE-2026-88830: unit confusion in TLS Montgomery reduction buffer allocation causes a pre-authentication heap buffer overflow when processing a crafted `ClientKeyExchange` message (bsc#1282575). - CVE-2026-88831: httpd silently fails open when IP deny rules contain invalid CIDR prefix lengths (bsc#1282550). - CVE-2026-88832: romfs volume ID parsing uses unbounded `strlen` on attacker-controlled metadata and allows for a heap buffer overflow when crafted filesystem images are processed (bsc#1282576). - CVE-2026-88835: dpkg read_package_field() steps past NUL terminator, causing out-of-bounds read on malformed .deb packages (bsc#1282551). - CVE-2026-88837: httpd misidentifies yescrypt password hashes as plaintext (bsc#1282552). - CVE-2026-88839: passwd/group parser writes heap pointers out of bounds due to stale tokenize() endpoint (bsc#1282568). - CVE-2026-88841: OOB read and silent memory corruption of the status file due to `write_status_file()` failing to reset the `field_start` cursor between package stanzas (bsc#1282653).",
    "evidence": "osv:SUSE-SU-2026:4773-1",
    "products": [
      {
        "name": {
          "value": "busybox",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.35.0-10.12.1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "busybox",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1.35.0-10.12.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "SUSE-SU-2026:4773-1",
      "aliases": [
        "SUSE-SU-2026:4773-1"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.35.0-10.12.1"
                }
              ]
            }
          ],
          "package": {
            "name": "busybox",
            "purl": "pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSS",
            "ecosystem": "SUSE:Linux Enterprise Server 12 SP5-LTSS"
          },
          "database_specific": {
            "source": "https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4773-1.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "busybox": "1.35.0-10.12.1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1.35.0-10.12.1"
                }
              ]
            }
          ],
          "package": {
            "name": "busybox",
            "purl": "pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5",
            "ecosystem": "SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5"
          },
          "database_specific": {
            "source": "https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2026:4773-1.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "busybox": "1.35.0-10.12.1"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-21T13:00:04.813354577Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-88830",
        "CVE-2026-88831",
        "CVE-2026-88832",
        "CVE-2026-88835",
        "CVE-2026-88837",
        "CVE-2026-88839",
        "CVE-2026-88841"
      ],
      "references": [
        "https://www.suse.com/support/update/announcement/2026/suse-su-20264773-1/",
        "https://bugzilla.suse.com/1282550",
        "https://bugzilla.suse.com/1282551",
        "https://bugzilla.suse.com/1282552",
        "https://bugzilla.suse.com/1282568",
        "https://bugzilla.suse.com/1282575",
        "https://bugzilla.suse.com/1282576",
        "https://bugzilla.suse.com/1282653",
        "https://www.suse.com/security/cve/CVE-2026-88830",
        "https://www.suse.com/security/cve/CVE-2026-88831",
        "https://www.suse.com/security/cve/CVE-2026-88832",
        "https://www.suse.com/security/cve/CVE-2026-88835",
        "https://www.suse.com/security/cve/CVE-2026-88837",
        "https://www.suse.com/security/cve/CVE-2026-88839",
        "https://www.suse.com/security/cve/CVE-2026-88841"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-88830",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-88831",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-88832",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-88835",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-88837",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-88839",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-88841",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 393167,
  "published_at": "2026-10-20T17:58:42+00:00"
}