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fix(libssh2): CVE-2026-58050 #6

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8 changes: 8 additions & 0 deletions debian/changelog
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Original file line number Diff line number Diff line change
@@ -1,3 +1,11 @@
libssh2 (1.11.1-1deepin4) unstable; urgency=medium

* Fix CVE-2026-58050: fix potential multiplication overflow in 32-bit
libssh2_publickey_list_fetch() when computing attribute allocation
size (upstream commit 34497525929b9a47f03dfb81887ac896202b7e12)

-- deepin-ci-robot <packages@deepin.org> Wed, 01 Jul 2026 13:40:42 +0800

libssh2 (1.11.1-1deepin2) unstable; urgency=medium

* Fix CVE-2026-7598: integer overflow in userauth_password
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21 changes: 21 additions & 0 deletions debian/patches/CVE-2026-58050.patch
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
Description: publickey: fix potential multiplication overflow in 32-bit
libssh2_publickey_list_fetch(). Cap list size at 1024 elements to
prevent integer overflow when computing attribute allocation size.
Origin: upstream, https://github.com/libssh2/libssh2/commit/34497525929b9a47f03dfb81887ac896202b7e12
Bug: https://github.com/libssh2/libssh2/pull/2128
Last-Update: 2026-07-01

--- a/src/publickey.c
+++ b/src/publickey.c
@@ -1048,6 +1048,11 @@ int libssh2_publickey_list_fetch(LIBSSH2_PUBLICKEY *pkey,
}

if(list[keys].num_attrs) {
+ if(list[keys].num_attrs > 1024) {
+ ssh2_err(session, LIBSSH2_ERROR_OUT_OF_BOUNDARY,
+ "Too many publickey attributes");
+ goto err_exit;
+ }
list[keys].attrs =
SSH2_ALLOC(session,
list[keys].num_attrs *
1 change: 1 addition & 0 deletions debian/patches/series
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Expand Up @@ -7,3 +7,4 @@
#maxpathlen.patch
#openssh-9.8.patch
CVE-2026-7598.patch
CVE-2026-58050.patch
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