CVE-2026-68159: Software Security Vulnerability Vulnerability
CRITICALCVE-2026-68159 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-121: Stack-based Buffer Overflow) affecting Software libraries in the Maven ecosystem. The weakness occurs when a stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).. Remediation is available in the latest vendor maintenance releases.
CVE-2026-68159 at a Glance
Security Impact
CVSS: 9.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2026-68159
To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:treeHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-68159, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:treeAnalyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.
Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-121: Stack-based Buffer Overflow, where a stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
References
Frequently Asked Questions
What is CVE-2026-68159?
Which Software versions are affected?
What version fixes CVE-2026-68159?
What is the CVSS score of CVE-2026-68159?
What CWE is associated with CVE-2026-68159?
How can I check Maven dependencies for CVE-2026-68159?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-83x9-86wr-8vh2",
"modified" : "2026-08-23T15:32:57Z",
"published" : "2026-08-10T15:33:38Z",
"aliases" : [ "CVE-2026-68159" ],
"details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE\n\n__decode_pg_temp() decodes an user-controlled length but only rejects\nvalues large enough to overflow the allocation; it does not bound it to\nCEPH_PG_MAX_SIZE. The helper backs both pg_temp and pg_upmap decoding, and\napply_upmap()/get_temp_osds() later copy the decoded list into the fixed-size\non-stack array struct ceph_osds.osds[CEPH_PG_MAX_SIZE]. A monitor that sends\nan OSDMap with a pg_temp/pg_upmap entry longer than 32 thus causes a stack\nout-of-bounds write.\n\nAn OSD set for a single PG can never exceed CEPH_PG_MAX_SIZE, so reject longer\nentries at decode time. The bound is well below the old overflow threshold, so\nit also covers the allocation-size overflow the previous check guarded against.\n\n BUG: KASAN: stack-out-of-bounds in ceph_pg_to_up_acting_osds\n Write of size 4 ... by task exploit\n kasan_report (mm/kasan/report.c:595)\n ceph_pg_to_up_acting_osds (net/ceph/osdmap.c:2617 net/ceph/osdmap.c:2833)\n calc_target (net/ceph/osd_client.c:1638)\n __submit_request (net/ceph/osd_client.c:2394)\n ceph_osdc_start_request (net/ceph/osd_client.c:2490)\n ceph_osdc_call (net/ceph/osd_client.c:5164)\n rbd_dev_image_probe (drivers/block/rbd.c:6899)\n do_rbd_add (drivers/block/rbd.c:7138)\n ...\n kernel BUG at net/ceph/osdmap.c:2670!\n\n[ idryomov: do the same in __decode_pg_upmap_items() ]",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-68159"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/42bc06c67d94d5f2a6b33294b0c4b07d8a47c515"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/4daf06456677177f2a6044729abac59c1b49e87b"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/590b07ceea138d49c9b64f65d263aa902d3b4730"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/66eec4af1e080b695229c9a20635648a6d12fedf"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/9f00f9cf2be293efe899db67dc5272e3a9c62717"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/d5650ddbd4d42c1a916c8fe1a4c4cb573ef810a1"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/e36663145abd7024f0281dfb22fdef65f185845b"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/ebdf4b4f3b1474079980a2e5cd79ad65fb54db57"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-121" ],
"severity" : "CRITICAL",
"github_reviewed" : false,
"github_reviewed_at" : null,
"nvd_published_at" : "2026-08-10T13:20:02Z"
}
}