Security readout for executives and security teams
Plain-English summary
Libsolv can mishandle malicious compressed data inside .solv files, causing memory corruption when a vulnerable application processes the file. The reported impact includes data exposure, altered execution, or denial of service. This is high risk where affected Red Hat systems may process untrusted .solv content.
Executive priority
Treat as high priority for Linux platform and package-management environments. It is not marked as actively exploited in the provided sources, but the memory-corruption impact is serious and vendor advisories exist, so remediation should enter the near-term patch cycle.
Technical view
CVE-2026-48864 is a CWE-787 heap buffer overflow in libsolv repopagestore decompression. Insufficient validation of attacker-controlled compressed .solv page data can trigger out-of-bounds memory access. CVSS 3.1 is 7.8 with local attack vector and required user interaction.
Likely exposure
Exposure centers on affected Red Hat products with vulnerable libsolv packages, including listed RHEL 7, 8, 9, 10, OpenShift Container Platform 4, Satellite 6, and Hardened Images. Red Hat Update Infrastructure 4 for Cloud Providers is listed as unaffected in the bundle.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. The attack requires a specially crafted .solv file to be processed by a vulnerable application, so risk rises where repository metadata or solver inputs can originate from untrusted sources.
Researcher notes
Key unknowns are exploit maturity, reachable application paths, and fixed package versions, which are not included in the bundle. Validation should focus on whether local workflows or automated systems process attacker-influenced .solv files through vulnerable libsolv builds.
Mitigation direction
- Review the linked Red Hat CVE page and RHSA advisories for fixed package guidance.
- Update affected libsolv packages using the applicable Red Hat advisory channel.
- Avoid processing untrusted .solv files until affected systems are remediated.
- Prioritize systems that ingest repository or package metadata from less-trusted sources.
Validation and detection
- Inventory libsolv package versions across affected Red Hat estates.
- Map findings to the affected product and package list in Red Hat guidance.
- Confirm RHUI 4 cloud-provider deployments match the listed unaffected status before deprioritizing.
- Retest vulnerable workflows after applying vendor-provided updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-48864 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9redhatVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineredhat
Reported to Red Hat.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineredhat
Made public.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2026:21333CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:28236CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:36730CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:39315CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-48864CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2460425CVE reference, redhat · issue-tracking, x_refsource_REDHAT
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.