diff --git a/.github/workflows/run_regression_tests.yaml b/.github/workflows/run_regression_tests.yaml
index ccdb10b26..33fc09ba4 100644
--- a/.github/workflows/run_regression_tests.yaml
+++ b/.github/workflows/run_regression_tests.yaml
@@ -16,31 +16,32 @@ jobs:
       fail-fast: false
       matrix:
         version: [
-                  '6.18.2',
+                  '6.19',
+                  '6.18.10',
                   '6.17.13',
                   '6.16.12',
                   '6.15.11',
                   '6.14.11',
                   '6.13.12',
-                  '6.12.63',
+                  '6.12.70',
                   '6.11.11',
                   '6.10.14',
                   '6.9.12',
                   '6.8.12',
                   '6.7.12',
-                  '6.6.119',
-                  '6.1.159',
-                  '5.15.197',
-                  '5.10.247',
+                  '6.6.124',
+                  '6.1.163',
+                  '5.15.200',
+                  '5.10.250',
                   '5.4.302',
                   '4.19.325',
                   '4.14.336',
                   '4.9.337',
                   '3.18.140',
                   '3.10.108',
-                  '6.12.0-124.21.1.el10_1^AlmaLinux^10.1',
+                  '6.12.0-124.31.1.el10_1^AlmaLinux^10.1',
                   '6.12.0-55.43.1.el10_0^AlmaLinux^10.0',
-                  '5.14.0-611.16.1.el9_7^AlmaLinux^9.7',
+                  '5.14.0-611.27.1.el9_7^AlmaLinux^9.7',
                   '5.14.0-570.62.1.el9_6^AlmaLinux^9.6',
                   '5.14.0-503.40.1.el9_5^AlmaLinux^9.5',
                   '5.14.0-427.42.1.el9_4^AlmaLinux^9.4',
@@ -48,7 +49,7 @@ jobs:
                   '5.14.0-284.30.1.el9_2^AlmaLinux^9.2',
                   '5.14.0-162.23.1.el9_1^AlmaLinux^9.1',
                   '5.14.0-70.30.1.el9_0^AlmaLinux^9.0',
-                  '4.18.0-553.87.1.el8_10^AlmaLinux^8.10',
+                  '4.18.0-553.104.1.el8_10^AlmaLinux^8.10',
                   '4.18.0-513.24.1.el8_9^AlmaLinux^8.9',
                   '4.18.0-477.13.1.el8_8^AlmaLinux^8.8',
                   '4.18.0-425.19.2.el8_7^AlmaLinux^8.7',
@@ -58,9 +59,9 @@ jobs:
                   '4.18.0-240.22.1.el8_3^AlmaLinux^8.3',
                   '3.10.0-1160.118.1.el7^CentOS^7.9.2009',
                   '3.10.0-862.14.4.el7^CentOS^7.5.1804',
-                  '6.12.0-106.55.4.2.el10uek^UEK^10',
-                  '5.15.0-315.196.5.2.el9uek^UEK^9',
-                  '5.4.17-2136.350.3.2.el8uek^UEK^8',
+                  '6.12.0-107.59.3.4.el10uek^UEK^10',
+                  '5.15.0-316.196.4.2.el9uek^UEK^9',
+                  '5.4.17-2136.352.5.el8uek^UEK^8',
                   '4.14.35-2047.543.3.1.el7uek^UEK^7',
                   '4.1.12-124.93.1.el7uek^UEK^7'
                  ]
diff --git a/nightly/conf/nightly.conf b/nightly/conf/nightly.conf
index 7a98f475c..d545241e2 100644
--- a/nightly/conf/nightly.conf
+++ b/nightly/conf/nightly.conf
@@ -3,35 +3,36 @@
 ABT_DETAILS="x86_64"
 ABT_JOBS=5
 ABT_KERNELS="  \
-6.18.2         \
+6.19           \
+6.18.10-nc     \
 6.17.13-nc     \
 6.16.12-nc     \
 6.15.11-nc     \
 6.14.11-nc     \
 6.13.12-nc     \
-6.12.63-nc     \
+6.12.70-nc     \
 6.11.11-nc     \
 6.10.14-nc     \
 6.9.12-nc      \
 6.8.12-nc      \
 6.7.12-nc      \
-6.6.119-nc     \
+6.6.124-nc     \
 6.5.13-nc      \
 6.4.16-nc      \
 6.3.13-nc      \
 6.2.16-nc      \
-6.1.159-nc     \
+6.1.163-nc     \
 6.0.19-nc      \
 5.19.17-nc     \
 5.18.19-nc     \
 5.17.15-nc     \
 5.16.20-nc     \
-5.15.197-nc    \
+5.15.200-nc    \
 5.14.21-nc     \
 5.13.19-nc     \
 5.12.19-nc     \
 5.11.22-nc     \
-5.10.247-nc    \
+5.10.250-nc    \
 5.9.16-nc      \
 5.8.18-nc      \
 5.7.19-nc      \
@@ -73,9 +74,9 @@ ABT_KERNELS="  \
 3.12.74-nc     \
 3.11.10-nc     \
 3.10.108-nc    \
-6.12.0-124.21.1.el10_1^AlmaLinux^10.1-nc \
+6.12.0-124.31.1.el10_1^AlmaLinux^10.1-nc \
 6.12.0-55.43.1.el10_0^AlmaLinux^10.0-nc  \
-5.14.0-611.16.1.el9_7^AlmaLinux^9.7-nc   \
+5.14.0-611.27.1.el9_7^AlmaLinux^9.7-nc   \
 5.14.0-570.62.1.el9_6^AlmaLinux^9.6-nc   \
 5.14.0-503.40.1.el9_5^AlmaLinux^9.5-nc   \
 5.14.0-427.42.1.el9_4^AlmaLinux^9.4-nc   \
@@ -83,7 +84,7 @@ ABT_KERNELS="  \
 5.14.0-284.30.1.el9_2^AlmaLinux^9.2-nc   \
 5.14.0-162.23.1.el9_1^AlmaLinux^9.1-nc   \
 5.14.0-70.30.1.el9_0^AlmaLinux^9.0-nc    \
-4.18.0-553.87.1.el8_10^AlmaLinux^8.10-nc \
+4.18.0-553.104.1.el8_10^AlmaLinux^8.10-nc \
 4.18.0-513.24.1.el8_9^AlmaLinux^8.9-nc   \
 4.18.0-477.13.1.el8_8^AlmaLinux^8.8-nc   \
 4.18.0-425.19.2.el8_7^AlmaLinux^8.7-nc   \
@@ -99,9 +100,9 @@ ABT_KERNELS="  \
 3.10.0-1062.18.1.el7^CentOS^7.7.1908-nc  \
 3.10.0-957.27.2.el7^CentOS^7.6.1810-nc   \
 3.10.0-862.14.4.el7^CentOS^7.5.1804-nc   \
-6.12.0-106.55.4.2.el10uek^UEK^10-nc      \
-5.15.0-315.196.5.2.el9uek^UEK^9-nc       \
-5.4.17-2136.350.3.2.el8uek^UEK^8-nc      \
+6.12.0-107.59.3.4.el10uek^UEK^10-nc      \
+5.15.0-316.196.4.2.el9uek^UEK^9-nc       \
+5.4.17-2136.352.5.el8uek^UEK^8-nc        \
 4.14.35-2047.543.3.1.el7uek^UEK^7-nc     \
 4.1.12-124.93.1.el7uek^UEK^7-nc          \
 "
diff --git a/scst/include/backport.h b/scst/include/backport.h
index 1d015ea6c..69939f41c 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -1748,6 +1748,8 @@ static inline int timer_delete_sync(struct timer_list *timer)
 #if LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0) &&			\
 	(LINUX_VERSION_CODE >> 8 != KERNEL_VERSION(6, 1, 0) >> 8 ||	\
 	 LINUX_VERSION_CODE < KERNEL_VERSION(6, 1, 91)) &&		\
+	(LINUX_VERSION_CODE >> 8 != KERNEL_VERSION(5, 15, 0) >> 8 ||	\
+	 LINUX_VERSION_CODE < KERNEL_VERSION(5, 15, 200)) &&		\
 	(!defined(RHEL_MAJOR) || RHEL_MAJOR -0 < 8 ||			\
 	 RHEL_MAJOR -0 == 8 && RHEL_MINOR -0 < 9 ||			\
 	 RHEL_MAJOR -0 == 9 && RHEL_MINOR -0 < 3) &&			\
@@ -1759,6 +1761,7 @@ static inline int timer_delete_sync(struct timer_list *timer)
 /*
  * See also commit bb663f0f3c39 ("timers: Rename del_timer() to timer_delete()") # v6.2.
  * See also commit b086d1e82fcd # v6.1.91.
+ * See also commit 29d5751350cd # v5.15.200.
  */
 static inline int timer_delete(struct timer_list *timer)
 {