CVE catalog

CVE-2026-48101

7-Zip is a file archiver with a high compression…

7-Zip is a file archiver with a high compression ratio. Versions 9.21 through 26.00 contain an An uninitialized memory disclosure vulnerability in the UEFI capsule (.scap) parser in 7-Zip. The OpenCapsule function allocates a heap buffer of attacker-declared CapsuleImageSize (up to 1 GiB) without zero-initialization, then reads the file contents into it with ReadStream_FALSE whose return value is silently discarded. If the file is truncated, the unread tail of the buffer retains uninitialized heap memory, which is then exposed as extracted file content via GetStream. Version 26.0.1 fixes the issue.

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Published: May 28, 2026, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.28% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	p7zip	`16.02+transitional.1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]
Debiansid	7zip	`26.01+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]
Debiansid	7zip	`26.05+dfsg-1`	Fixed	[CVE-2026-48101]
Debianforky	7zip	`26.01+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]
Debianforky	7zip	`26.05+dfsg-1`	Fixed	[CVE-2026-48101]
Debianbookworm-security	7zip	`22.01+really26.02+dfsg-0+deb12u1`	Fixed	[CVE-2026-48101]
Debianbookworm-security	p7zip	`16.02+really26.02+dfsg-0+deb12u1`	Fixed	[CVE-2026-48101]
Debianbookworm	7zip	`22.01+really26.01+dfsg-0+deb12u1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]
Debianbookworm	p7zip	`16.02+really26.01+dfsg-0+deb12u1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]

Showing 9 fix observations. All 14 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
UnknownRelease not reported	7-zip	`26.01`	UnknownSource applicability is not established	Provider not reported
UnknownRelease not reported	7zip	`22.01+really26.01+dfsg-0+deb12u1`	UnknownSource applicability is not established	Provider not reported
Alpine3.24	7zip	`26.01-r0`	UnknownSource applicability is not established	[ALPINE-CVE-2026-48101]Oct 1, 2026, 2:17:49 AM UTC
Debianbookworm	7zip	`22.01+really26.01+dfsg-0+deb12u1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]
Debianbookworm	p7zip	`16.02+really26.01+dfsg-0+deb12u1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]
Debianbookworm-security	7zip	`22.01+really26.02+dfsg-0+deb12u1`	Fixed	[CVE-2026-48101]
Debianbookworm-security	p7zip	`16.02+really26.02+dfsg-0+deb12u1`	Fixed	[CVE-2026-48101]
Debianforky	7zip	`26.01+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]
Debianforky	7zip	`26.05+dfsg-1`	Fixed	[CVE-2026-48101]
Debiansid	7zip	`26.01+dfsg-1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]
Debiansid	7zip	`26.05+dfsg-1`	Fixed	[CVE-2026-48101]
Debiantrixie	7zip	Not reported	AffectedDistribution reports no fix	[CVE-2026-48101]
Debiantrixie	7zip	`25.01+dfsg-1~deb13u2`	Affected	[CVE-2026-48101]
Debiantrixie	p7zip	`16.02+transitional.1`	FixedDistribution-reported fixed boundary	[CVE-2026-48101]

Original provider fields

{
  "package_releases": [
    {
      "name": "7zip",
      "status": "fixed",
      "release": "sid",
      "version": "26.05+dfsg-1"
    },
    {
      "name": "7zip",
      "status": "fixed",
      "release": "forky",
      "version": "26.05+dfsg-1"
    },
    {
      "name": "7zip",
      "status": "vulnerable",
      "release": "trixie",
      "version": "25.01+dfsg-1~deb13u2"
    },
    {
      "name": "7zip",
      "status": "fixed",
      "release": "bookworm",
      "version": "22.01+really26.01+dfsg-0+deb12u1"
    },
    {
      "name": "7zip",
      "status": "fixed",
      "release": "bookworm-security",
      "version": "22.01+really26.02+dfsg-0+deb12u1"
    },
    {
      "name": "p7zip",
      "status": "fixed",
      "release": "trixie",
      "version": "16.02+transitional.1"
    },
    {
      "name": "p7zip",
      "status": "fixed",
      "release": "bookworm",
      "version": "16.02+really26.01+dfsg-0+deb12u1"
    },
    {
      "name": "p7zip",
      "status": "fixed",
      "release": "bookworm-security",
      "version": "16.02+really26.02+dfsg-0+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "7zip",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "unimportant",
      "fixed_version": "26.01+dfsg-1"
    },
    {
      "bug": null,
      "name": "7zip",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "unimportant",
      "fixed_version": "26.01+dfsg-1"
    },
    {
      "bug": null,
      "name": "7zip",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": ""
    },
    {
      "bug": null,
      "name": "7zip",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "22.01+really26.01+dfsg-0+deb12u1"
    },
    {
      "bug": null,
      "name": "p7zip",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "16.02+transitional.1"
    },
    {
      "bug": null,
      "name": "p7zip",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "16.02+really26.01+dfsg-0+deb12u1"
    }
  ],
  "distribution_packages": [
    {
      "name": "7zip",
      "fixed_version": "22.01+really26.01+dfsg-0+deb12u1",
      "applicability_unknown": true
    },
    {
      "name": "7-zip",
      "fixed_version": "26.01",
      "applicability_unknown": true
    },
    {
      "name": "7zip",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "26.01-r0"
            }
          ]
        }
      ],
      "release": "3.24",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2026-48101",
      "fixed_version": "26.01-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2026-48101",
      "provider_updated_at": "2026-10-01T02:17:49.317444614Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[7zip]Unknown
Details (6)
- 22.01+really26.01+dfsg-0+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 22.01+really26.01+dfsg-0+deb12u1
  nvd · 7zip · debian · bookworm; nvd · 7zip · debian · 12
- 22.01+really26.01+dfsg-0+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 22.01+really26.01+dfsg-0+deb12u1
  nvd · 7zip · debian · bookworm; nvd · 7zip · debian · 12
- 25.01+dfsg-1~deb13u1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 22.01+really26.01+dfsg-0+deb12u1
  nvd · 7zip · debian · bookworm; nvd · 7zip · debian · 12
- 25.01+dfsg-1~deb13u1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 22.01+really26.01+dfsg-0+deb12u1
  nvd · 7zip · debian · bookworm; nvd · 7zip · debian · 12
- 22.01+really26.02+dfsg-0+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 22.01+really26.01+dfsg-0+deb12u1
  nvd · 7zip · debian · bookworm; nvd · 7zip · debian · 12
- 22.01+really26.02+dfsg-0+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 22.01+really26.01+dfsg-0+deb12u1
  nvd · 7zip · debian · bookworm; nvd · 7zip · debian · 12
[7zip-standalone]Unknown
Source package: [7zip]
Details (2)
- 25.01+dfsg-1~deb13u1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 22.01+really26.01+dfsg-0+deb12u1
  nvd · 7zip · debian · bookworm; nvd · 7zip · debian · 12
- 25.01+dfsg-1~deb13u1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 22.01+really26.01+dfsg-0+deb12u1
  nvd · 7zip · debian · bookworm; nvd · 7zip · debian · 12
[p7zip]Unknown
Details (4)
- 16.02+really26.01+dfsg-0+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 16.02+really26.01+dfsg-0+deb12u1
  nvd · p7zip · debian · bookworm; nvd · p7zip · debian · 12
- 16.02+really26.01+dfsg-0+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 16.02+really26.01+dfsg-0+deb12u1
  nvd · p7zip · debian · bookworm; nvd · p7zip · debian · 12
- 16.02+really26.02+dfsg-0+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 16.02+really26.01+dfsg-0+deb12u1
  nvd · p7zip · debian · bookworm; nvd · p7zip · debian · 12
- 16.02+really26.02+dfsg-0+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 16.02+really26.01+dfsg-0+deb12u1
  nvd · p7zip · debian · bookworm; nvd · p7zip · debian · 12
[p7zip-full]Unknown
Source package: [p7zip]
Details (4)
- 16.02+really26.01+dfsg-0+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 16.02+really26.01+dfsg-0+deb12u1
  nvd · p7zip · debian · bookworm; nvd · p7zip · debian · 12
- 16.02+really26.01+dfsg-0+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 16.02+really26.01+dfsg-0+deb12u1
  nvd · p7zip · debian · bookworm; nvd · p7zip · debian · 12
- 16.02+really26.02+dfsg-0+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 16.02+really26.01+dfsg-0+deb12u1
  nvd · p7zip · debian · bookworm; nvd · p7zip · debian · 12
- 16.02+really26.02+dfsg-0+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 16.02+really26.01+dfsg-0+deb12u1
  nvd · p7zip · debian · bookworm; nvd · p7zip · debian · 12

[Debian 13 (Trixie)]

[7zip]Unknown
Details (2)
- 25.01+dfsg-1~deb13u2 · amd64 · trixie
  Affected
  nvd · 7zip · debian · 13
- 25.01+dfsg-1~deb13u2 · arm64 · trixie
  Affected
  nvd · 7zip · debian · 13
[7zip-standalone]Unknown
Source package: [7zip]
Details (2)
- 25.01+dfsg-1~deb13u2 · amd64 · trixie
  Affected
  nvd · 7zip · debian · 13
- 25.01+dfsg-1~deb13u2 · arm64 · trixie
  Affected
  nvd · 7zip · debian · 13
[p7zip]Unknown
Details (2)
- 16.02+transitional.1 · all · trixie
  Fixed · Fixed: 16.02+transitional.1
  nvd · p7zip · debian · 13
- 16.02+transitional.1 · all · trixie
  Fixed · Fixed: 16.02+transitional.1
  nvd · p7zip · debian · 13
[p7zip-full]Unknown
Source package: [p7zip]
Details (2)
- 16.02+transitional.1 · all · trixie
  Fixed · Fixed: 16.02+transitional.1
  nvd · p7zip · debian · 13
- 16.02+transitional.1 · all · trixie
  Fixed · Fixed: 16.02+transitional.1
  nvd · p7zip · debian · 13

Observed: Oct 23, 2026, 9:49:37 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]