Description
Text::CSV_XS versions before 1.62 for Perl have a use-after-free when registered callbacks extend the Perl argument stack, which may enable type confusion or memory corruption. The Parse, print, getline, and getline_all methods invoke registered callbacks (for example after_parse, before_print, or on_error) and cache the Perl argument stack pointer across the call. If a callback extends the argument stack enough to trigger a reallocation, the return value is written through the stale pointer into the freed buffer, and the caller reads the original $self argument as the return value instead. Calling code that expects parsed data from getline_all receives the Text::CSV_XS object in its place, leading to logic errors or crashes. Text::CSV_XS objects used without any registered callbacks are not affected.
Affected products
hmbrand: text\
References4
- github.com/cpan-authors/Text-CSV_XS/commit/c17f31a5f2bf36674748… Mailing ListPatch
- metacpan.org/release/HMBRAND/Text-CSV_XS-1.62/changes ProductRelease Notes
- www.openwall.com/lists/oss-security/2026/04/29/17 Mailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2026/06/msg00037.html
Metrics
- CVSS 3.1
-
8.4
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 13 November 2026
- CWE
- CWE-416CWE-825
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