Race condition in ELF core dump segment counting
Summary
| CVE | CVE-2026-58088 |
|---|---|
| State | PUBLISHED |
| Assigner | freebsd |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-19 08:17:12 UTC |
| Updated | 2026-08-31 15:04:36 UTC |
| Description | The ELF core dump code counted the number of dumpable VM map entries, allocated a buffer for the corresponding program headers, then iterated over the map a second time to populate them. A process sharing the address space via rfork(2) can mutate the map between the two passes, causing the second pass to write program headers past the end of the buffer. An unprivileged local user sharing an address space with a process that dumps core can trigger an out-of-bounds write on the kernel heap, potentially leading to privilege escalation. |
Risk And Classification
Primary CVSS: v3.1 7.4 HIGH from ADP
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001060000 probability, percentile 0.012180000 (date 2026-08-31)
Problem Types: CWE-362 | CWE-787 | CWE-362 CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') | CWE-787 CWE-787: Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | DECLARED | 7.4 | HIGH | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 7.4 | HIGH | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
HighPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Freebsd | Freebsd | 14.4 | - | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p2 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p3 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p4 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p5 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p6 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | p7 | All | All |
| Operating System | Freebsd | Freebsd | 14.4 | rc1 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | - | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p10 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p11 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p2 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p3 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p4 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p5 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p6 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p7 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p8 | All | All |
| Operating System | Freebsd | Freebsd | 15.0 | p9 | All | All |
| Operating System | Freebsd | Freebsd | 15.1 | - | All | All |
| Operating System | Freebsd | Freebsd | 15.1 | p1 | All | All |
| Operating System | Freebsd | Freebsd | 15.1 | rc2 | All | All |
| Operating System | Freebsd | Freebsd | 15.1 | rc3-p1 | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| security.freebsd.org/advisories/FreeBSD-SA-26:55.elf.asc | [email protected] | security.freebsd.org | Vendor Advisory, Mailing List |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Maik Muench of Secfault Security (en)
There are currently no legacy QID mappings associated with this CVE.