Be more wary about constant's datatype in scalarineqsel().
The special case here for estimating conditions involving a ctid
column failed to check that the RHS constant is of type tid.
While that'd always be true for the built-in operators that
reference this selectivity estimator, a maliciously constructed
operator could provide a user-controlled Datum value that would
get interpreted as an ItemPointer pointer. That at least risks
SIGSEGV, and perhaps with a bit of sweat it could be used for
server memory disclosure.
Reported-by: Hcamael <baiyjrh@gmail.com>
Author: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Noah Misch <noah@leadboat.com>
Backpatch-through: 14
Security: CVE-2026-14668
Branch
------
REL_16_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/591192e2ec76922f847e39e01d4d4d3ababc5178
Author: Tom Lane <tgl@sss.pgh.pa.us>
Modified Files
--------------
src/backend/utils/adt/selfuncs.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
