pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using /FlateDecode with large size values. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
1.26.0-21.26.0-3ubuntu11.26.0-3ubuntu1.20.04.11.26.0-3ubuntu1.20.04.21.26.0-41.26.0-4ubuntu0.22.04.11.26.0-4ubuntu0.22.04.23.17.4-13.4.1-14.0.0-14.0.1-14.0.2-12.12.1-32.12.1-44.3.1-15.4.0-15.4.0-16.9.2-11.23+git20141008-11.25.1-11.25.1-1ubuntu0.1~esm11.25.1-1ubuntu0.1~esm21.26.0-21.26.0-2ubuntu0.1~esm11.26.0-2ubuntu0.1~esm2Exploitability
AV:LAC:LAT:NPR:NUI:PVulnerable System
VC:NVI:NVA:LSubsequent System
SC:NSI:NSA:NCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N