diff mbox series

[wrynose,1/2] libgcrypt: fix CVE-2026-41989

Message ID 20260723123155.795532-2-leonid.iziumtsev@est.tech
State New
Headers show
Series libgcrypt: fix multiple CVEs | expand

Commit Message

Leonid Iziumtsev July 23, 2026, 12:31 p.m. UTC 
Backport patch to fix CVE-2026-41989.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2026-41989
  https://osv.dev/list?q=CVE-2026-41989

Upstream fix:
  https://github.com/gpg/libgcrypt/commit/2d3d732c9bf87cc10729f69678dd9e6862f99fa3

Signed-off-by: Leonid Iziumtsev <leonid.iziumtsev@est.tech>
---
 .../libgcrypt/files/CVE-2026-41989.patch      | 42 +++++++++++++++++++
 .../libgcrypt/libgcrypt_1.12.1.bb             |  1 +
 2 files changed, 43 insertions(+)
 create mode 100644 meta/recipes-support/libgcrypt/files/CVE-2026-41989.patch
diff mbox series

Patch

diff --git a/meta/recipes-support/libgcrypt/files/CVE-2026-41989.patch b/meta/recipes-support/libgcrypt/files/CVE-2026-41989.patch
new file mode 100644
index 0000000000..aba3ca318b
--- /dev/null
+++ b/meta/recipes-support/libgcrypt/files/CVE-2026-41989.patch
@@ -0,0 +1,42 @@ 
+From d8874dd38f78454dd3a760617ebe8d9aa9270649 Mon Sep 17 00:00:00 2001
+From: NIIBE Yutaka <gniibe@fsij.org>
+Date: Fri, 10 Apr 2026 16:58:57 +0900
+Subject: [PATCH] cipher:ecc: Fix decoding a point on Montgomery curve.
+
+* cipher/ecc-misc.c (_gcry_ecc_mont_decodepoint): Fix the padding
+mistake and add updating RAWMPILEN.
+
+--
+
+Reported by Calif.io in collaboration with Claude and Anthropic
+Research.
+
+GnuPG-bug-id: 8211
+Fixes-commit: bbe15758c893dbf546416c1a6bccdad1ab000ad7
+Suggested-by: Bronson Yen <bronson@calif.io>
+Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
+
+CVE: CVE-2026-41989
+Upstream-Status: Backport [https://github.com/gpg/libgcrypt/commit/2d3d732c9bf87cc10729f69678dd9e6862f99fa3]
+
+Signed-off-by: Leonid Iziumtsev <leonid.iziumtsev@est.tech>
+---
+ cipher/ecc-misc.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/cipher/ecc-misc.c b/cipher/ecc-misc.c
+index 615b0df2..ab3799dc 100644
+--- a/cipher/ecc-misc.c
++++ b/cipher/ecc-misc.c
+@@ -438,7 +438,10 @@ _gcry_ecc_mont_decodepoint (gcry_mpi_t pk, mpi_ec_t ec, mpi_point_t result)
+         *--p = *buf++;
+ 
+       if (rawmpilen < nbytes)
+-        memset (rawmpi + nbytes - rawmpilen, 0, nbytes - rawmpilen);
++        {
++          memset (rawmpi + rawmpilen, 0, nbytes - rawmpilen);
++          rawmpilen = nbytes;
++        }
+     }
+   else
+     {
diff --git a/meta/recipes-support/libgcrypt/libgcrypt_1.12.1.bb b/meta/recipes-support/libgcrypt/libgcrypt_1.12.1.bb
index b3c0d050b7..55872a5c23 100644
--- a/meta/recipes-support/libgcrypt/libgcrypt_1.12.1.bb
+++ b/meta/recipes-support/libgcrypt/libgcrypt_1.12.1.bb
@@ -25,6 +25,7 @@  SRC_URI = "${GNUPG_MIRROR}/libgcrypt/libgcrypt-${PV}.tar.bz2 \
            file://no-native-gpg-error.patch \
            file://no-bench-slope.patch \
            file://run-ptest \
+           file://CVE-2026-41989.patch \
            "
 SRC_URI[sha256sum] = "7df5c08d952ba33f9b6bdabdb06a61a78b2cf62d2122c2d1d03a91a79832aa3c"