OESA-2026-2753

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-2753
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-2753.json
JSON Data
https://api.test.osv.dev/v1/vulns/OESA-2026-2753
Upstream
Published
2026-06-24T11:11:40Z
Modified
2026-08-18T01:20:41Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
kernel security update
Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

In the Linux kernel, the following vulnerability has been resolved:

dm: fix a buffer overflow in ioctl processing

Tony Asleson (using Claude) found a buffer overflow in dm-ioctl in the function retrieve_status:

  1. The code in retrieve_status checks that the output string fits into the output buffer and writes the output string there
  2. Then, the code aligns the "outptr" variable to the next 8-byte boundary: outptr = align_ptr(outptr);
  3. The alignment doesn't check overflow, so outptr could point past the buffer end
  4. The "for" loop is iterated again, it executes: remaining = len - (outptr - outbuf);
  5. If "outptr" points past "outbuf + len", the arithmetics wraps around and the variable "remaining" contains unusually high number
  6. With "remaining" being high, the code writes more data past the end of the buffer

Luckily, this bug has no security implications because:

  1. Only root can issue device mapper ioctls
  2. The commonly used libraries that communicate with device mapper (libdevmapper and devicemapper-rs) use buffer size that is aligned to 8 bytes - thus, "outptr = align_ptr(outptr)" can't overshoot the input buffer and the bug can't happen accidentally(CVE-2026-46294)
Database specific 
{
    "severity":  "High"
}
References

Affected packages

openEuler:20.03-LTS-SP4 / kernel

Package

Name
kernel
Purl
pkg:rpm/openEuler/kernel&distro=openEuler-20.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.19.90-2606.4.0.0377.oe2003sp4

Ecosystem specific 

{
    "aarch64":  [
        "bpftool-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "bpftool-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "kernel-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "kernel-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "kernel-debugsource-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "kernel-devel-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "kernel-source-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "kernel-tools-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "kernel-tools-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "kernel-tools-devel-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "perf-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "python2-perf-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "python2-perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "python3-perf-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm",
        "python3-perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.aarch64.rpm"
    ],
    "src":  [
        "kernel-4.19.90-2606.4.0.0377.oe2003sp4.src.rpm"
    ],
    "x86_64":  [
        "bpftool-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "bpftool-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "kernel-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "kernel-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "kernel-debugsource-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "kernel-devel-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "kernel-source-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "kernel-tools-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "kernel-tools-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "kernel-tools-devel-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "perf-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "python2-perf-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "python2-perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "python3-perf-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm",
        "python3-perf-debuginfo-4.19.90-2606.4.0.0377.oe2003sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2753.json"