Gentoo Websites Logo
Go to: Gentoo Home Documentation Forums Lists Bugs Planet Store Wiki Get Gentoo!
Bug 839354 (CVE-2022-24859) - <dev-python/PyPDF2-1.27.5: infinite loop vulnerability
Summary: <dev-python/PyPDF2-1.27.5: infinite loop vulnerability
Alias: CVE-2022-24859
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [noglsa]
Depends on: 839372
  Show dependency tree
Reported: 2022-04-19 02:03 UTC by John Helmert III
Modified: 2022-04-19 15:46 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


Note You need to log in before you can comment on or make changes to this bug.
Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-04-19 02:03:25 UTC

PyPDF2 is an open source python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. In versions prior to 1.27.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 if the code attempts to get the content stream. The reason is that the last while-loop in `ContentStream._readInlineImage` only terminates when it finds the `EI` token, but never actually checks if the stream has already ended. This issue has been resolved in version `1.27.5`. Users unable to upgrade should validate and PDFs prior to iterating over their content stream.

Please stabilize 1.27.5.
Comment 1 Larry the Git Cow gentoo-dev 2022-04-19 06:53:45 UTC
The bug has been referenced in the following commit(s):

commit c3ec427ca440b2414083291e19982faec6e37b6e
Author:     Arthur Zamarin <>
AuthorDate: 2022-04-19 06:53:20 +0000
Commit:     Arthur Zamarin <>
CommitDate: 2022-04-19 06:53:20 +0000

    dev-python/PyPDF2: drop 1.26.0-r2, 1.27.1, 1.27.3, 1.27.4
    Signed-off-by: Arthur Zamarin <>

 dev-python/PyPDF2/Manifest                         |  4 ---
 dev-python/PyPDF2/PyPDF2-1.26.0-r2.ebuild          | 33 ------------------
 dev-python/PyPDF2/PyPDF2-1.27.1.ebuild             | 39 ----------------------
 dev-python/PyPDF2/PyPDF2-1.27.3.ebuild             | 39 ----------------------
 dev-python/PyPDF2/PyPDF2-1.27.4.ebuild             | 39 ----------------------
 .../PyPDF2/files/PyPDF2-1.26.0-py3-tests.patch     | 35 -------------------
 6 files changed, 189 deletions(-)
Comment 2 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-04-19 15:46:05 UTC
Thanks! Low impact, all done!