synced 12 MIN AGO
01 Record

CVE-2026-17544

Out-of-bounds write in bccomp() via crafted operand and scale

HighPUBLISHEDCNA: php
CNA base score8.1 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N
View raw JSON

02 Description

Out-of-bounds write in bccomp() via crafted operand and scale

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.41% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 35.8% of scored records. A rank, not a probability.
NVD base score
8.1 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:X/V:X/RE:X/U:X
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-23.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-07-30 11:22Z3 MO AGO
Last updated
2026-07-31 03:55Z3 MO AGO
Reserved
2026-07-27
Assigning CNA
php
Record state
PUBLISHED
Severity
High (CVSS 8.1)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N
Weaknesses
Data version
5.2
Document digest
f2d75299507e410e267dbee92de6e24b2611620d63d937a874ef3b9edf6be8cb

05 Affected products

VendorProductVersionsPlatforms
PHP GroupPHP8.4.* to < 8.4.24, 8.5.* to < 8.5.9—

06 References

07 Fixed in

AlmaLinux 10

  • php8.4
    Fixed in 8.4.24-1.el10_2
  • php8.4-bcmath
    Fixed in 8.4.24-1.el10_2
  • php8.4-cli
    Fixed in 8.4.24-1.el10_2
  • php8.4-common
    Fixed in 8.4.24-1.el10_2
  • php8.4-dba
    Fixed in 8.4.24-1.el10_2
  • php8.4-dbg
    Fixed in 8.4.24-1.el10_2
  • php8.4-devel
    Fixed in 8.4.24-1.el10_2
  • php8.4-embedded
    Fixed in 8.4.24-1.el10_2
  • php8.4-enchant
    Fixed in 8.4.24-1.el10_2
  • php8.4-ffi
    Fixed in 8.4.24-1.el10_2
  • php8.4-fpm
    Fixed in 8.4.24-1.el10_2
  • php8.4-gd
    Fixed in 8.4.24-1.el10_2
  • php8.4-gmp
    Fixed in 8.4.24-1.el10_2
  • php8.4-intl
    Fixed in 8.4.24-1.el10_2
  • php8.4-ldap
    Fixed in 8.4.24-1.el10_2
  • php8.4-mbstring
    Fixed in 8.4.24-1.el10_2
  • php8.4-mysqlnd
    Fixed in 8.4.24-1.el10_2
  • php8.4-odbc
    Fixed in 8.4.24-1.el10_2
  • php8.4-opcache
    Fixed in 8.4.24-1.el10_2
  • php8.4-pdo
    Fixed in 8.4.24-1.el10_2
  • php8.4-pgsql
    Fixed in 8.4.24-1.el10_2
  • php8.4-process
    Fixed in 8.4.24-1.el10_2
  • php8.4-snmp
    Fixed in 8.4.24-1.el10_2
  • php8.4-soap
    Fixed in 8.4.24-1.el10_2
  • php8.4-xml
    Fixed in 8.4.24-1.el10_2

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • php8.4
    Fixed in 8.4.24-1.el10_2
  • php8.4-bcmath
    Fixed in 8.4.24-1.el10_2
  • php8.4-cli
    Fixed in 8.4.24-1.el10_2
  • php8.4-common
    Fixed in 8.4.24-1.el10_2
  • php8.4-dba
    Fixed in 8.4.24-1.el10_2
  • php8.4-dbg
    Fixed in 8.4.24-1.el10_2
  • php8.4-devel
    Fixed in 8.4.24-1.el10_2
  • php8.4-embedded
    Fixed in 8.4.24-1.el10_2
  • php8.4-enchant
    Fixed in 8.4.24-1.el10_2
  • php8.4-ffi
    Fixed in 8.4.24-1.el10_2
  • php8.4-fpm
    Fixed in 8.4.24-1.el10_2
  • php8.4-gd
    Fixed in 8.4.24-1.el10_2
  • php8.4-gmp
    Fixed in 8.4.24-1.el10_2
  • php8.4-intl
    Fixed in 8.4.24-1.el10_2
  • php8.4-ldap
    Fixed in 8.4.24-1.el10_2
  • php8.4-mbstring
    Fixed in 8.4.24-1.el10_2
  • php8.4-mysqlnd
    Fixed in 8.4.24-1.el10_2
  • php8.4-odbc
    Fixed in 8.4.24-1.el10_2
  • php8.4-opcache
    Fixed in 8.4.24-1.el10_2
  • php8.4-pdo
    Fixed in 8.4.24-1.el10_2
  • php8.4-pgsql
    Fixed in 8.4.24-1.el10_2
  • php8.4-process
    Fixed in 8.4.24-1.el10_2
  • php8.4-snmp
    Fixed in 8.4.24-1.el10_2
  • php8.4-soap
    Fixed in 8.4.24-1.el10_2
  • php8.4-xml
    Fixed in 8.4.24-1.el10_2

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • php8.4
    Fixed in 8.4.24-1~deb13u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • php8.4
    Fixed in 8.4.24-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • php8.5
    Fixed in 8.5.4-0ubuntu1.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.