Detections
Analytics
EulerOS 2.0 SP13 : perl (EulerOS-SA-2026-4081)
high Nessus Plugin ID 364755
Synopsis
The remote EulerOS host is missing multiple security updates.Description
According to the versions of the perl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in S_regmatch.
The regex engine's superlinear cache holds one bit per subject position for each participating WHILEM node, so the bit count is the subject length plus one times the number of nodes. Nothing checks that product for positive overflow of the signed 32-bit count: a 286331153 byte subject matched against a pattern with 15 participating nodes stores the count as 14, leaving a two byte cache. The cache is then indexed from the real match position and node number, so reads go past the end of the allocation, and on failure CACHEsayNO sets a bit past it.
A caller that matches an attacker controlled subject of this size against a pattern of this shape can crash the process or corrupt heap memory.(CVE-2026-15534)
Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack.
S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds.
A template derived from untrusted input can read heap memory past the buffer and return it to the caller.(CVE-2026-57432)
Socket versions before 2.041 for Perl have an out-of-bounds heap read.
In Socket.xs, pack_ip_mreq_source() checks the length of its source argument before the argument is read, so the check tests the byte length carried over from the preceding multiaddr argument instead. Both addresses occupy a 4-byte field, so a valid multiaddr lets a source of any length pass the check, and the source is then copied into the 4-byte imr_sourceaddr field with a fixed-size copy. A source shorter than 4 bytes is not rejected, and the copy reads up to 3 bytes past the end of its buffer.
Calling pack_ip_mreq_source() with a source value shorter than 4 bytes copies adjacent heap memory into the returned packed structure.(CVE-2026-12087)
Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a crafted SX_HOOK record.
retrieve_hook_common reads a signed 32-bit item count from an SX_HOOK record and calls av_extend with that count plus one. A count of I32_MAX wraps the addition to a negative value.
A crafted blob passed to thaw or retrieve triggers the overflow; av_extend receives the negative count and dies with a panic, terminating the deserialization.(CVE-2026-57433)
Tenable has extracted the preceding description block directly from the EulerOS perl security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected perl packages.See Also
Plugin Details
Severity: High
ID: 364755
File Name: EulerOS_SA-2026-4081.nasl
Version: 1.1
Type: Local
Family: Huawei Local Security Checks
Published: 10/12/2026
Updated: 10/12/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.1
Percentile: 98.36
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-57432
CVSS v3
Risk Factor: High
Base Score: 8.4
Temporal Score: 7.3
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:perl-devel, p-cpe:/a:huawei:euleros:perl-help, p-cpe:/a:huawei:euleros:perl-libs, p-cpe:/a:huawei:euleros:perl
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp
Excluded KB Items: Host/EulerOS/uvp_version
Exploit Ease: No known exploits are available
Patch Publication Date: 10/10/2026
Vulnerability Publication Date: 6/15/2026
Reference Information
CVE: CVE-2026-12087, CVE-2026-15534, CVE-2026-57432, CVE-2026-57433