CVE-2026-74256: Software Security Vulnerability Vulnerability

HIGH

Advisory Identifier: GHSA-5w87-22m9-4mhm

CVSS 8.4

Published 2026-08-15

Advisory Summary

CVE-2026-74256 is a HIGH (CVSS 8.4) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-74256 at a Glance

CVE Identifier CVE-2026-74256

GHSA Identifier GHSA-5w87-22m9-4mhm

Severity HIGH

CVSS v3.1 Base Score 8.4

CWE Classification General Security Weakness

Affected Product Software

Package Ecosystem Maven

Published Date 2026-08-15

Last Updated 2026-08-17

Security Impact

CVSS: 8.4

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

Attack Vector Local (AV:L)

Attack Complexity Low (AC:L)

Privileges Required None (PR:N)

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-2026-74256

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-2026-74256, 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: bpf, sockmap: fix integer overflow in bpf_msg_pop_data() bounds check start and len are u32, so u64 last = start + len; evaluates start + len in 32-bit and wraps before storing it in last. The bounds check if (start >= offset + l || last > msg->sg.size) return -EINVAL; can then be passed with an out-of-range start/len, after which the pop loop runs off the end of the scatterlist and sk_msg_shift_left() calls put_page() on the empty msg->sg.end slot: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] RIP: 0010:sk_msg_shift_left net/core/filter.c:2957 [inline] RIP: 0010:____bpf_msg_pop_data net/core/filter.c:3103 [inline] RIP: 0010:bpf_msg_pop_data+0x753/0x1a10 net/core/filter.c:2984 Call Trace: <TASK> bpf_prog_4cc92c278f4d5d56+0x1b1/0x1e8 bpf_prog_run_pin_on_cpu+0x107/0x320 include/linux/filter.h:746 sk_psock_msg_verdict+0x357/0x7f0 net/core/skmsg.c:934 tcp_bpf_send_verdict net/ipv4/tcp_bpf.c:420 [inline] tcp_bpf_sendmsg+0x766/0x1ae0 net/ipv4/tcp_bpf.c:583 __sock_sendmsg+0x153/0x1c0 net/socket.c:802 __sys_sendto+0x326/0x430 net/socket.c:2265 __x64_sys_sendto+0xe3/0x100 net/socket.c:2268 do_syscall_64+0x14c/0x480 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> Widen the addition with a (u64) cast so the bound is evaluated in 64-bit and a len near U32_MAX no longer wraps below msg->sg.size. While here, change pop from int to u32. It counts bytes against the unsigned scatterlist lengths and can never be negative, so the signed type only invites sign-confusion in the pop loop.

References

NVD — CVE-2026-74256 NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-74256

git.kernel.org/stable/c/17eb9832a1... WEB

https://git.kernel.org/stable/c/17eb9832a10db2f7a80cb429ca2bc5038445a943

git.kernel.org/stable/c/9ef44ed6fb... WEB

https://git.kernel.org/stable/c/9ef44ed6fb0c1db01cfcc3de432a33e719713eb5

git.kernel.org/stable/c/a48802fb2c... WEB

https://git.kernel.org/stable/c/a48802fb2cd2d1e23651989f8ff4d15e9d5dad54

git.kernel.org/stable/c/ba5cc05dae... WEB

https://git.kernel.org/stable/c/ba5cc05dae8fce237d191c7ea96b1107a791e548

git.kernel.org/stable/c/c05a0ec1cd... WEB

https://git.kernel.org/stable/c/c05a0ec1cdced622a1a0c7d85679fe02f31033ec

git.kernel.org/stable/c/d693c5ed67... WEB

https://git.kernel.org/stable/c/d693c5ed67dabe1ccbf8dcea93075bdc9ffd4ca0

git.kernel.org/stable/c/e09f7bd727... WEB

https://git.kernel.org/stable/c/e09f7bd7273928b4089e6b71f8e992f2b356ca1b

git.kernel.org/stable/c/fe09dd2887... WEB

https://git.kernel.org/stable/c/fe09dd288722f1c749b7506c0b3e7841a7d85027

Frequently Asked Questions

What is CVE-2026-74256?

CVE-2026-74256 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-2026-74256?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

What is the CVSS score of CVE-2026-74256?

CVE-2026-74256 has a CVSS v3.1 base score of 8.4 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

What CWE is associated with CVE-2026-74256?

CVE-2026-74256 is classified under General Security Weakness.

How can I check Maven dependencies for CVE-2026-74256?

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-5w87-22m9-4mhm",
  "modified" : "2026-08-17T06:33:34Z",
  "published" : "2026-08-15T06:32:27Z",
  "aliases" : [ "CVE-2026-74256" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: fix integer overflow in bpf_msg_pop_data() bounds check\n\nstart and len are u32, so\n\n\tu64 last = start + len;\n\nevaluates start + len in 32-bit and wraps before storing it in last.\nThe bounds check\n\n\tif (start >= offset + l || last > msg->sg.size)\n\t\treturn -EINVAL;\n\ncan then be passed with an out-of-range start/len, after which the pop\nloop runs off the end of the scatterlist and sk_msg_shift_left() calls\nput_page() on the empty msg->sg.end slot:\n\n  Oops: general protection fault, probably for non-canonical address\n  0xdffffc0000000001: 0000 [#1] SMP KASAN PTI\n  KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\n  RIP: 0010:sk_msg_shift_left net/core/filter.c:2957 [inline]\n  RIP: 0010:____bpf_msg_pop_data net/core/filter.c:3103 [inline]\n  RIP: 0010:bpf_msg_pop_data+0x753/0x1a10 net/core/filter.c:2984\n  Call Trace:\n   <TASK>\n   bpf_prog_4cc92c278f4d5d56+0x1b1/0x1e8\n   bpf_prog_run_pin_on_cpu+0x107/0x320 include/linux/filter.h:746\n   sk_psock_msg_verdict+0x357/0x7f0 net/core/skmsg.c:934\n   tcp_bpf_send_verdict net/ipv4/tcp_bpf.c:420 [inline]\n   tcp_bpf_sendmsg+0x766/0x1ae0 net/ipv4/tcp_bpf.c:583\n   __sock_sendmsg+0x153/0x1c0 net/socket.c:802\n   __sys_sendto+0x326/0x430 net/socket.c:2265\n   __x64_sys_sendto+0xe3/0x100 net/socket.c:2268\n   do_syscall_64+0x14c/0x480\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n   </TASK>\n\nWiden the addition with a (u64) cast so the bound is evaluated in\n64-bit and a len near U32_MAX no longer wraps below msg->sg.size.\n\nWhile here, change pop from int to u32. It counts bytes against the\nunsigned scatterlist lengths and can never be negative, so the signed\ntype only invites sign-confusion in the pop loop.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/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-2026-74256"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/17eb9832a10db2f7a80cb429ca2bc5038445a943"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9ef44ed6fb0c1db01cfcc3de432a33e719713eb5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a48802fb2cd2d1e23651989f8ff4d15e9d5dad54"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ba5cc05dae8fce237d191c7ea96b1107a791e548"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c05a0ec1cdced622a1a0c7d85679fe02f31033ec"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d693c5ed67dabe1ccbf8dcea93075bdc9ffd4ca0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e09f7bd7273928b4089e6b71f8e992f2b356ca1b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fe09dd288722f1c749b7506c0b3e7841a7d85027"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:22:24Z"
  }
}

CVSS V3

8.4 HIGH