Vulnerability-Lookup

SUSE-SU-2026:1433-1

Vulnerability from csaf_suse - Published: 2026-04-17 10:13 - Updated: 2026-04-17 10:13

Summary

Security update for libcap

Severity

Important

Notes

Title of the patch: Security update for libcap

Description of the patch: This update for libcap fixes the following issue: - CVE-2026-4878: Address a potential TOCTOU race condition in cap_set_file() (bsc#1261809).

Patchnames: SUSE-2026-1433,SUSE-SLE-SERVER-12-SP5-LTSS-2026-1433,SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-1433

CVE-2026-4878

7 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

References

URL

Category

	https://www.suse.com/support/security/rating/	external
	https://ftp.suse.com/pub/projects/security/csaf/s…	self
	https://www.suse.com/support/update/announcement/…	self
	https://lists.suse.com/pipermail/sle-security-upd…	self
	https://bugzilla.suse.com/1261809	self
	https://www.suse.com/security/cve/CVE-2026-4878/	self
	https://www.suse.com/security/cve/CVE-2026-4878	external
	https://bugzilla.suse.com/1261809	external

JSON

To clipboard

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        {
          "category": "general",
          "text": "A flaw was found in libcap. A local unprivileged user can exploit a Time-of-check-to-time-of-use (TOCTOU) race condition in the `cap_set_file()` function. This allows an attacker with write access to a parent directory to redirect file capability updates to an attacker-controlled file. By doing so, capabilities can be injected into or stripped from unintended executables, leading to privilege escalation.",
          "title": "CVE description"
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          "SUSE Linux Enterprise Server LTSS Extended Security 12 SP5:libcap2-32bit-2.26-14.12.1.x86_64"
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      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-4878",
          "url": "https://www.suse.com/security/cve/CVE-2026-4878"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1261809 for CVE-2026-4878",
          "url": "https://bugzilla.suse.com/1261809"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-17T10:13:12Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-4878"
    }
  ]
}

CVE-2026-4878 (GCVE-0-2026-4878)

Vulnerability from cvelistv5 – Published: 2026-04-09 14:49 – Updated: 2026-04-18 17:34

Title

Libcap: libcap: privilege escalation via toctou race condition in cap_set_file()

Summary

A flaw was found in libcap. A local unprivileged user can exploit a Time-of-check-to-time-of-use (TOCTOU) race condition in the `cap_set_file()` function. This allows an attacker with write access to a parent directory to redirect file capability updates to an attacker-controlled file. By doing so, capabilities can be injected into or stripped from unintended executables, leading to privilege escalation.

Severity ?

6.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

redhat

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2026-4878	vdb-entryx_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2447554
	https://bugzilla.redhat.com/show_bug.cgi?id=2451615	issue-trackingx_refsource_REDHAT

Impacted products

Vendor

Product

Version

Red Hat

Red Hat Enterprise Linux 10

cpe:/o:redhat:enterprise_linux:10

Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat Hardened Images	cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public ?

2026-04-06 00:00

Credits

Red Hat would like to thank Ali Raza for reporting this issue.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

SUSE-SU-2026:1433-1

CVE-2026-4878 (GCVE-0-2026-4878)

Tags

Sightings

Nomenclature