CVE-2019-11046: Buffer underflow in bc_shift_addsub
Vulnerability summary
CVE-2019-11046 is a medium (CVSS 5.3) Out-of-bounds Read vulnerability in canonical ubuntu_linux. EPSS estimates a 4.12% chance of exploitation in the next 30 days, higher than 90.7% of scored vulnerabilities.
Not severe (CVSS 3.7, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 10Timeline
- 23-12-2019PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
In PHP versions 7.2.x below 7.2.26, 7.3.x below 7.3.13 and 7.4.0, PHP bcmath extension functions on some systems, including Windows, can be tricked into reading beyond the allocated space by supplying it with string containing characters that are identified as numeric by the OS but aren't ASCII numbers. This can read to disclosure of the content of some memory locations.
CVSS metrics
4 scores · 3 sources · 2 versions- CVE.orgCNA3.7LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated3.7LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:NDiffers
EPSS trend
Probability
4.12%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
Increase +0.03 pp
From 4.08% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu3 products
- php5< 5.5.9+dfsg-1ubuntu4.29+esm8
- php7.0< 7.0.33-0ubuntu0.16.04.9
- php7.2< 7.2.24-0ubuntu0.18.04.2
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04 | 19.04 | 19.10
Debian1 product
- debian_linuxEOL8.0 | 9.0 | 10.0
Fedoraproject1 product
- fedoraEOL30 | 31
Opensuse1 product
- leapEOL15.1
Php1 product
- phpEOL≥ 7.2.0, ≤ 7.2.26 | ≥ 7.3.0, ≤ 7.3.13 | 7.4.0
Php group1 product
- php≥ 7.2.x, < 7.2.26 | ≥ 7.3.x, < 7.3.13 | ≥ 7.4.x, < 7.4.1
Tenable1 product
- security_center< 5.19.0
8 vendors · 10 products
References
18 links
lists.debian.org/debian-lts-announce/2019/12/msg00034.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.opensuse.org/opensuse-security-announce/2020-01/msg00036.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory