Control: unarchive 1138905 Control: retitle 1138905 perl: CVE-2026-57432: integer overflow in S_measure_struct Control: forcemerge 1138905 -1
On Tue, Jul 14, 2026 at 08:51:35AM +0200, Salvatore Bonaccorso wrote: > Source: perl > Version: 5.40.1-8 > Severity: important > Tags: security upstream > X-Debbugs-Cc: [email protected], Debian Security Team > <[email protected]> > > Hi, > > The following vulnerability was published for perl. > > CVE-2026-57432[0]: > | Perl versions through 5.43.10 have an integer overflow in > | S_measure_struct leading to an out-of-bounds heap read in pack and > | unpack. S_measure_struct adds each item's size times its repeat > | count to a running total with no overflow check, so a large repeat > | count in a pack or unpack template wraps the signed SSize_t total > | negative. The @, X, and x position codes then guard their moves with > | a signed length comparison that passes when the length is negative, > | advancing the buffer pointer out of bounds. A template derived from > | untrusted input can read heap memory past the buffer and return it > | to the caller. > > > If you fix the vulnerability please also make sure to include the > CVE (Common Vulnerabilities & Exposures) id in your changelog entry. > > For further information see: > > [0] https://security-tracker.debian.org/tracker/CVE-2026-57432 > https://www.cve.org/CVERecord?id=CVE-2026-57432 > [1] https://lists.security.metacpan.org/cve-announce/msg/41780102/ > > Please adjust the affected versions in the BTS as needed. This is #1138905, already fixed in testing/unstable (but not in stable so far.) So merging. -- Niko
