CVE-2019-11926: facebook hhvm
Vulnerability summary
CVE-2019-11926 is a critical (CVSS 9.8) vulnerability in facebook hhvm. EPSS estimates a 2.29% chance of exploitation in the next 30 days, higher than 82.9% of scored vulnerabilities.
Timeline
- 06-09-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Insufficient boundary checks when processing M_SOFx markers from JPEG headers in the GD extension could allow access to out-of-bounds memory via a maliciously constructed invalid JPEG input. This issue affects HHVM versions prior to 3.30.9, all versions between 4.0.0 and 4.8.3, all versions between 4.9.0 and 4.15.2, and versions 4.16.0 to 4.16.3, 4.17.0 to 4.17.2, 4.18.0 to 4.18.1, 4.19.0, 4.20.0 to 4.20.1.
CVSS metrics
3 scores · 2 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
2.29%
Chance of exploitation in the next 30 days
Percentile
83%
Versus all other CVEs
30-day change
0.00 pp
From 2.29% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
- CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.
Affected systems
Facebook1 product
- hhvm4.21.0 | 4.20.2 | ≥ 4.20.0, < unspecified | 4.19.1 | ≥ 4.19.0, < unspecified | 4.18.2 | ≥ 4.18.0, < unspecified | 4.17.3 | ≥ 4.17.0, < unspecified | 4.16.4 | ≥ 4.16.0, < unspecified | 4.15.3 | ≥ 4.9.0, < unspecified | 4.8.4 | ≥ 4.0.0, < unspecified | 3.30.10 | ≥ unspecified, ≤ 3.30.9 | ≤ 3.30.9 | ≥ 4.0.0, ≤ 4.8.3 | ≥ 4.9.0, ≤ 4.15.2 | ≥ 4.16.0, ≤ 4.16.3 | ≥ 4.17.0, ≤ 4.17.2 | ≥ 4.18.0, ≤ 4.18.1 | ≥ 4.20.0, ≤ 4.20.1 | 4.19.0
Ubuntu1 product
- hhvmAll versions (No fix recorded)
2 vendors · 2 products
References
5 links- github.com/facebook/hhvm/commit/f9680d21beaa9eb39d166e8810e29fbafa51ad15X Refsource CONFIRMPatchThird Party AdvisoryREPORT