CVE-2026-93259: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-8h7f-5wc3-64cf
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Advisory Summary

CVE-2026-93259 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-93259 at a Glance

CVE Identifier CVE-2026-93259
GHSA Identifier GHSA-8h7f-5wc3-64cf
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-93259

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.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-93259, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze 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 General Security Weakness. 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

In the Linux kernel, the following vulnerability has been resolved: powerpc/irq: Fix missing r2 clobber in PCREL inline assembly In CONFIG_PPC_KERNEL_PCREL mode, r2 is no longer reserved for the TOC pointer and is available as a caller-saved register [0]. Both call_do_irq() and call_do_softirq() use inline assembly to call functions with stack switching, but fail to list r2 in their clobber lists. This causes the compiler to assume r2 is preserved across these calls, leading to register corruption when the called functions (__do_irq and __do_softirq) clobber r2. As a result of this kernel crash during interrupt handling is seen and the kernel fails to boot: BUG: Unable to handle kernel data access on write at 0xc000000404697638 Faulting instruction address: 0xc0000000000181ec Oops: Kernel access of bad area, sig: 11 [#1] NIP [c0000000000181ec] __do_IRQ+0x6c/0xc0 With older GCC, the compiler would conservatively allocate callee-saved registers (like r31) for values spanning function calls, accidentally avoiding the bug: <__do_IRQ>: 00 00 00 60 nop a6 02 08 7c mflr r0 f8 ff e1 fb std r31,-8(r1) f0 ff c1 fb std r30,-16(r1) 2d 03 10 06 pla r31,53297316 ... 3d e8 ff 4b bl c0000000000165ac <__do_irq> 00 00 21 e8 ld r1,0(r1) 28 00 4d e9 ld r10,40(r13) 40 00 21 38 addi r1,r1,64 2a f9 aa 7f stdx r29,r10,r31 With newer GCC 14, the compiler uses r2 for such values, exposing the missing clobber specification: <__do_IRQ>: 00 00 00 60 nop a6 02 08 7c mflr r0 f0 ff c1 fb std r30,-16(r1) f8 ff e1 fb std r31,-8(r1) 29 02 10 06 pla r2,36252592 # c0000000022aadc0 <__irq_regs> ... 85 dc ff 4b bl c000000000015ee0 <__do_irq> 00 00 21 e8 ld r1,0(r1) 28 00 2d e9 ld r9,40(r13) 30 00 21 38 addi r1,r1,48 2a 11 c9 7f stdx r30,r9,r2 Fix this by adding r2 to the clobber list for both call_do_irq() and call_do_softirq() when CONFIG_PPC_KERNEL_PCREL is enabled. [0]: https://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg313226.html

References

NVD — CVE-2026-93259 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-93259
git.kernel.org/stable/c/00be69070d... WEB
https://git.kernel.org/stable/c/00be69070d91d2be978e752bb117a0a4db0e1281
git.kernel.org/stable/c/602ee44415... WEB
https://git.kernel.org/stable/c/602ee44415f3eaa7893f7fc488c7c1d4a0bdbd7a
git.kernel.org/stable/c/7b0093b638... WEB
https://git.kernel.org/stable/c/7b0093b638c8f2b94b0778a69fd1ccad54299b29
git.kernel.org/stable/c/90d953002c... WEB
https://git.kernel.org/stable/c/90d953002cf0b233dd053a0e7cb67ab79cebd0e3
git.kernel.org/stable/c/dcc442a49c... WEB
https://git.kernel.org/stable/c/dcc442a49c0f540193910dacdca7506bcadc7ec5

Frequently Asked Questions

What is CVE-2026-93259?
CVE-2026-93259 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-93259?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-93259?
CVE-2026-93259 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-93259?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8h7f-5wc3-64cf",
  "modified" : "2026-09-24T18:31:24Z",
  "published" : "2026-09-24T18:31:24Z",
  "aliases" : [ "CVE-2026-93259" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/irq: Fix missing r2 clobber in PCREL inline assembly\n\nIn CONFIG_PPC_KERNEL_PCREL mode, r2 is no longer reserved for the TOC\npointer and is available as a caller-saved register [0].\n\nBoth call_do_irq() and call_do_softirq() use inline assembly to call\nfunctions with stack switching, but fail to list r2 in their clobber\nlists. This causes the compiler to assume r2 is preserved across these\ncalls, leading to register corruption when the called functions\n(__do_irq and __do_softirq) clobber r2.\n\nAs a result of this kernel crash during interrupt handling is seen and\nthe kernel fails to boot:\n\nBUG: Unable to handle kernel data access on write at 0xc000000404697638\nFaulting instruction address: 0xc0000000000181ec\nOops: Kernel access of bad area, sig: 11 [#1]\nNIP [c0000000000181ec] __do_IRQ+0x6c/0xc0\n\nWith older GCC, the compiler would conservatively allocate\ncallee-saved registers (like r31) for values spanning function calls,\naccidentally avoiding the bug:\n\n<__do_IRQ>:\n00 00 00 60 \tnop\na6 02 08 7c \tmflr    r0\nf8 ff e1 fb \tstd     r31,-8(r1)\nf0 ff c1 fb \tstd     r30,-16(r1)\n2d 03 10 06 \tpla     r31,53297316\n\n...\n\n3d e8 ff 4b \tbl      c0000000000165ac <__do_irq>\n00 00 21 e8 \tld      r1,0(r1)\n28 00 4d e9 \tld      r10,40(r13)\n40 00 21 38 \taddi    r1,r1,64\n2a f9 aa 7f \tstdx    r29,r10,r31\n\nWith newer GCC 14, the compiler uses r2 for such values, exposing the\nmissing clobber specification:\n\n<__do_IRQ>:\n00 00 00 60     nop\na6 02 08 7c     mflr    r0\nf0 ff c1 fb     std     r30,-16(r1)\nf8 ff e1 fb     std     r31,-8(r1)\n29 02 10 06     pla     r2,36252592     # c0000000022aadc0 <__irq_regs>\n\n...\n\n85 dc ff 4b \tbl      c000000000015ee0 <__do_irq>\n00 00 21 e8 \tld      r1,0(r1)\n28 00 2d e9 \tld      r9,40(r13)\n30 00 21 38 \taddi    r1,r1,48\n2a 11 c9 7f \tstdx    r30,r9,r2\n\nFix this by adding r2 to the clobber list for both call_do_irq() and\ncall_do_softirq() when CONFIG_PPC_KERNEL_PCREL is enabled.\n\n[0]: https://www.mail-archive.com/gcc-patches@gcc.gnu.org/msg313226.html",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-93259"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/00be69070d91d2be978e752bb117a0a4db0e1281"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/602ee44415f3eaa7893f7fc488c7c1d4a0bdbd7a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7b0093b638c8f2b94b0778a69fd1ccad54299b29"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/90d953002cf0b233dd053a0e7cb67ab79cebd0e3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dcc442a49c0f540193910dacdca7506bcadc7ec5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-24T16:17:22Z"
  }
}