30 lines
860 B
Diff
30 lines
860 B
Diff
From 6ba5ff1b7b1547a59f750fbc06b89737b7456117 Mon Sep 17 00:00:00 2001
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From: Jakub Jelen <jjelen@redhat.com>
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Date: Thu, 8 Jan 2026 12:09:50 +0100
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Subject: [PATCH 05/12] CVE-2026-0966 misc: Avoid heap buffer underflow in
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ssh_get_hexa
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Signed-off-by: Jakub Jelen <jjelen@redhat.com>
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Reviewed-by: Pavol Žáčik <pzacik@redhat.com>
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(cherry picked from commit 417a095e6749a1f3635e02332061edad3c6a3401)
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diff --git a/src/misc.c b/src/misc.c
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index 774211fb..08c690b2 100644
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--- a/src/misc.c
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+++ b/src/misc.c
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@@ -459,7 +459,7 @@ char *ssh_get_hexa(const unsigned char *what, size_t len)
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size_t i;
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size_t hlen = len * 3;
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- if (len > (UINT_MAX - 1) / 3) {
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+ if (what == NULL || len < 1 || len > (UINT_MAX - 1) / 3) {
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return NULL;
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}
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--
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2.52.0
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