CVE-2026-74748: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-hf83-xv8x-wgq9
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CVSS 7.8
Published
Advisory Summary

CVE-2026-74748 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-74748 at a Glance

CVE Identifier CVE-2026-74748
GHSA Identifier GHSA-hf83-xv8x-wgq9
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-74748

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-2026-74748, 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: netfilter: ipset: fix refcount race between list:set GC and swap __ip_set_put_byindex() resolved the index to a set pointer under RCU, then took ip_set_ref_lock in __ip_set_put() to decrement set->ref. ip_set_swap() holds that same lock while swapping both the ip_set_list slots and the two sets' ref counters, so it can interleave between the dereference and the lock acquisition, leaving the caller to decrement a set whose reference already moved to the other index and hit BUG_ON(set->ref == 0). list_set_gc() reaches this from timer softirq, which the nfnl mutex does not serialize against swap: an expiring list:set member calls list_set_del() -> ip_set_put_byindex() while IPSET_CMD_SWAP runs on the referenced sets. Resolve the index and decrement under ip_set_ref_lock, as ip_set_swap() already does, keeping the refcount tied to the index rather than to a stale set pointer. kernel BUG at net/netfilter/ipset/ip_set_core.c:685! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI RIP: 0010:ip_set_put_byindex (net/netfilter/ipset/ip_set_core.c:870) Call Trace: <IRQ> list_set_del (net/netfilter/ipset/ip_set_list_set.c:159) set_cleanup_entries (net/netfilter/ipset/ip_set_list_set.c:181) list_set_gc (net/netfilter/ipset/ip_set_list_set.c:578) call_timer_fn (kernel/time/timer.c:1748) __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2374) run_timer_softirq (kernel/time/timer.c:2405) </IRQ> Kernel panic - not syncing: Fatal exception in interrupt

References

NVD — CVE-2026-74748 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74748
git.kernel.org/stable/c/0c88868271... WEB
https://git.kernel.org/stable/c/0c88868271653537ed443272dd8e7d13634d214b
git.kernel.org/stable/c/20cb13a523... WEB
https://git.kernel.org/stable/c/20cb13a523f0a05cb2d0a7d72abae687683712e0
git.kernel.org/stable/c/24ffcb1e16... WEB
https://git.kernel.org/stable/c/24ffcb1e1688c55fd2a505f064295cd28eac546d
git.kernel.org/stable/c/97a01de0c6... WEB
https://git.kernel.org/stable/c/97a01de0c6321b7210d30d0a4d60f10f561097c7
git.kernel.org/stable/c/b0aab9dd1a... WEB
https://git.kernel.org/stable/c/b0aab9dd1a348b99d75ff52765719d0cc2050630
git.kernel.org/stable/c/b891e7a6bb... WEB
https://git.kernel.org/stable/c/b891e7a6bb06e0f6560e5932665ac660acd12225
git.kernel.org/stable/c/c21afc7c21... WEB
https://git.kernel.org/stable/c/c21afc7c216a4d257a4f3f300e0791890bc846b9
git.kernel.org/stable/c/cb20da3383... WEB
https://git.kernel.org/stable/c/cb20da33839f28f590c99f16bafaa6151451c0e8

Frequently Asked Questions

What is CVE-2026-74748?
CVE-2026-74748 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-2026-74748?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74748?
CVE-2026-74748 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-74748?
CVE-2026-74748 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74748?
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-hf83-xv8x-wgq9",
  "modified" : "2026-08-27T06:31:31Z",
  "published" : "2026-08-27T06:31:31Z",
  "aliases" : [ "CVE-2026-74748" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: fix refcount race between list:set GC and swap\n\n__ip_set_put_byindex() resolved the index to a set pointer under RCU,\nthen took ip_set_ref_lock in __ip_set_put() to decrement set->ref.\nip_set_swap() holds that same lock while swapping both the ip_set_list\nslots and the two sets' ref counters, so it can interleave between the\ndereference and the lock acquisition, leaving the caller to decrement a\nset whose reference already moved to the other index and hit\nBUG_ON(set->ref == 0). list_set_gc() reaches this from timer softirq,\nwhich the nfnl mutex does not serialize against swap: an expiring\nlist:set member calls list_set_del() -> ip_set_put_byindex() while\nIPSET_CMD_SWAP runs on the referenced sets.\n\nResolve the index and decrement under ip_set_ref_lock, as ip_set_swap()\nalready does, keeping the refcount tied to the index rather than to a\nstale set pointer.\n\n  kernel BUG at net/netfilter/ipset/ip_set_core.c:685!\n  Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\n  RIP: 0010:ip_set_put_byindex (net/netfilter/ipset/ip_set_core.c:870)\n  Call Trace:\n   <IRQ>\n   list_set_del (net/netfilter/ipset/ip_set_list_set.c:159)\n   set_cleanup_entries (net/netfilter/ipset/ip_set_list_set.c:181)\n   list_set_gc (net/netfilter/ipset/ip_set_list_set.c:578)\n   call_timer_fn (kernel/time/timer.c:1748)\n   __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2374)\n   run_timer_softirq (kernel/time/timer.c:2405)\n   </IRQ>\n  Kernel panic - not syncing: Fatal exception in interrupt",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-74748"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0c88868271653537ed443272dd8e7d13634d214b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/20cb13a523f0a05cb2d0a7d72abae687683712e0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/24ffcb1e1688c55fd2a505f064295cd28eac546d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/97a01de0c6321b7210d30d0a4d60f10f561097c7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b0aab9dd1a348b99d75ff52765719d0cc2050630"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b891e7a6bb06e0f6560e5932665ac660acd12225"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c21afc7c216a4d257a4f3f300e0791890bc846b9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cb20da33839f28f590c99f16bafaa6151451c0e8"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-26T15:16:53Z"
  }
}