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[AutoPR- Security] Patch frr for CVE-2026-5107 [LOW] #16439

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[AutoPR- Security] Patch frr for CVE-2026-5107 [LOW] #16439

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103 changes: 103 additions & 0 deletions SPECS/frr/CVE-2026-5107.patch
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Original file line number Diff line number Diff line change
@@ -0,0 +1,103 @@
From dfc8716b0a8de82545502fedc7dd2e59e8a64293 Mon Sep 17 00:00:00 2001
From: Mark Stapp <[email protected]>
Date: Wed, 11 Mar 2026 14:52:54 -0400
Subject: [PATCH] bgpd: improve packet parsing for EVPN and ENCAP/VNC

Improve packet validation for EVPN NLRIs and for ENCAP/VNC.

Signed-off-by: Mark Stapp <[email protected]>
(cherry picked from commit 7676cad65114aa23adde583d91d9d29e2debd045)
Signed-off-by: Azure Linux Security Servicing Account <[email protected]>
Upstream-reference: https://github.com/FRRouting/frr/commit/52c72c5ad8ccb491a9bab096002072667089d2d3.patch
---
bgpd/bgp_evpn.c | 17 +++++++++++++++++
bgpd/bgp_evpn_mh.c | 10 +++++++++-
bgpd/rfapi/rfapi_rib.c | 9 +++++++++
3 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/bgpd/bgp_evpn.c b/bgpd/bgp_evpn.c
index 2b2cfa0..e45bd46 100644
--- a/bgpd/bgp_evpn.c
+++ b/bgpd/bgp_evpn.c
@@ -4505,6 +4505,14 @@ static int process_type2_route(struct peer *peer, afi_t afi, safi_t safi,
goto fail;
}

+ /* Validate ipaddr_len against the NLRI length */
+ if ((psize != 33 + (ipaddr_len / 8)) && (psize != 36 + (ipaddr_len / 8))) {
+ flog_err(EC_BGP_EVPN_ROUTE_INVALID,
+ "%u:%s - Rx EVPN Type-2 NLRI with invalid IP address length %d",
+ peer->bgp->vrf_id, peer->host, ipaddr_len);
+ goto fail;
+ }
+
if (ipaddr_len) {
ipaddr_len /= 8; /* Convert to bytes. */
p.prefix.macip_addr.ip.ipa_type = (ipaddr_len == IPV4_MAX_BYTELEN)
@@ -4603,6 +4611,15 @@ static int process_type3_route(struct peer *peer, afi_t afi, safi_t safi,

/* Get the IP. */
ipaddr_len = *pfx++;
+
+ /* Validate */
+ if (psize != 13 + (ipaddr_len / 8)) {
+ flog_err(EC_BGP_EVPN_ROUTE_INVALID,
+ "%u:%s - Rx EVPN Type-3 NLRI with invalid IP address length %d",
+ peer->bgp->vrf_id, peer->host, ipaddr_len);
+ return -1;
+ }
+
if (ipaddr_len == IPV4_MAX_BITLEN) {
p.prefix.imet_addr.ip.ipa_type = IPADDR_V4;
memcpy(&p.prefix.imet_addr.ip.ip.addr, pfx, IPV4_MAX_BYTELEN);
diff --git a/bgpd/bgp_evpn_mh.c b/bgpd/bgp_evpn_mh.c
index 5523659..548e9de 100644
--- a/bgpd/bgp_evpn_mh.c
+++ b/bgpd/bgp_evpn_mh.c
@@ -733,9 +733,17 @@ int bgp_evpn_type4_route_process(struct peer *peer, afi_t afi, safi_t safi,
memcpy(&esi, pfx, ESI_BYTES);
pfx += ESI_BYTES;

-
/* Get the IP. */
ipaddr_len = *pfx++;
+
+ /* Validate */
+ if (psize != 19 + (ipaddr_len / 8)) {
+ flog_err(EC_BGP_EVPN_ROUTE_INVALID,
+ "%u:%s - Rx EVPN Type-4 NLRI with invalid IP address length %d",
+ peer->bgp->vrf_id, peer->host, ipaddr_len);
+ return -1;
+ }
+
if (ipaddr_len == IPV4_MAX_BITLEN) {
memcpy(&vtep_ip, pfx, IPV4_MAX_BYTELEN);
} else {
diff --git a/bgpd/rfapi/rfapi_rib.c b/bgpd/rfapi/rfapi_rib.c
index a9c0c02..71fcab0 100644
--- a/bgpd/rfapi/rfapi_rib.c
+++ b/bgpd/rfapi/rfapi_rib.c
@@ -648,11 +648,20 @@ static void rfapiRibBi2Ri(struct bgp_path_info *bpi, struct rfapi_info *ri,
break;

case BGP_VNC_SUBTLV_TYPE_RFPOPTION:
+ /* Check for short subtlv: drop */
+ if (pEncap->length < 3)
+ break;
+
+ /* Length of zero not valid */
+ if (pEncap->value[1] == 0)
+ break;
+
hop = XCALLOC(MTYPE_BGP_TEA_OPTIONS,
sizeof(struct bgp_tea_options));
assert(hop);
hop->type = pEncap->value[0];
hop->length = pEncap->value[1];
+
hop->value = XCALLOC(MTYPE_BGP_TEA_OPTIONS_VALUE,
pEncap->length - 2);
assert(hop->value);
--
2.45.4

6 changes: 5 additions & 1 deletion SPECS/frr/frr.spec
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
Summary: Routing daemon
Name: frr
Version: 8.5.5
Release: 5%{?dist}
Release: 6%{?dist}
License: GPL-2.0-or-later
Vendor: Microsoft Corporation
Distribution: Mariner
Expand All @@ -22,6 +22,7 @@ Patch7: 0001-Fix-frr-c90-complaint-error.patch
# Following CVE fixes CVE-2025-61100, CVE-2025-61101, CVE-2025-61102, CVE-2025-61103,
# CVE-2025-61104, CVE-2025-61105, CVE-2025-61106 and CVE-2025-61107.
Patch8: CVE-2025-61099.patch
Patch9: CVE-2026-5107.patch
BuildRequires: autoconf
BuildRequires: automake
BuildRequires: bison
Expand Down Expand Up @@ -203,6 +204,9 @@ rm tests/lib/*grpc*
%{_sysusersdir}/%{name}.conf

%changelog
* Thu Apr 02 2026 Azure Linux Security Servicing Account <[email protected]> - 8.5.5-6
- Patch for CVE-2026-5107

* Wed Jan 21 2026 Archana Shettigar <[email protected]> - 8.5.5-5
- Patch CVE-2025-61099, CVE-2025-61100, CVE-2025-61101, CVE-2025-61102,
CVE-2025-61103, CVE-2025-61104, CVE-2025-61105, CVE-2025-61106 and CVE-2025-61107
Expand Down
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