Race condition in ELF core dump segment counting

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-58088
StatePUBLISHED
Assignerfreebsd
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 08:17:12 UTC
Updated2026-08-19 08:17:12 UTC
DescriptionThe 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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA FreeBSD FreeBSD affected 15.1-RELEASE p2 release Not specified
CNA FreeBSD FreeBSD affected 15.0-RELEASE p12 release Not specified
CNA FreeBSD FreeBSD affected 14.4-RELEASE p8 release Not specified

References

ReferenceSourceLinkTags
security.freebsd.org/advisories/FreeBSD-SA-26:55.elf.asc [email protected] security.freebsd.org
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)

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