In the Linux kernel, the following vulnerability has been resolved:
jffs2: check that raw node were preallocated before writing summary
Syzkaller detected a kernel bug in jffs2_link_node_ref, caused by fault injection in jffs2_prealloc_raw_node_refs. jffs2_sum_write_sumnode doesn't check return value of jffs2_prealloc_raw_node_refs and simply lets any error propagate into jffs2_sum_write_data, which eventually calls jffs2_link_node_ref in order to link the summary to an expectedly allocated node.
kernel BUG at fs/jffs2/nodelist.c:592! invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 1 PID: 31277 Comm: syz-executor.7 Not tainted 6.1.128-syzkaller-00139-ge10f83ca10a1 #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:jffs2_link_node_ref+0x570/0x690 fs/jffs2/nodelist.c:592 Call Trace: <TASK> jffs2_sum_write_data fs/jffs2/summary.c:841 [inline] jffs2_sum_write_sumnode+0xd1a/0x1da0 fs/jffs2/summary.c:874 jffs2_do_reserve_space+0xa18/0xd60 fs/jffs2/nodemgmt.c:388 jffs2_reserve_space+0x55f/0xaa0 fs/jffs2/nodemgmt.c:197 jffs2_write_inode_range+0x246/0xb50 fs/jffs2/write.c:362 jffs2_write_end+0x726/0x15d0 fs/jffs2/file.c:301 generic_perform_write+0x314/0x5d0 mm/filemap.c:3856 __generic_file_write_iter+0x2ae/0x4d0 mm/filemap.c:3973 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4005 call_write_iter include/linux/fs.h:2265 [inline] do_iter_readv_writev+0x20f/0x3c0 fs/read_write.c:735 do_iter_write+0x186/0x710 fs/read_write.c:861 vfs_iter_write+0x70/0xa0 fs/read_write.c:902 iter_file_splice_write+0x73b/0xc90 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0x10c/0x170 fs/splice.c:950 splice_direct_to_actor+0x337/0xa10 fs/splice.c:896 do_splice_direct+0x1a9/0x280 fs/splice.c:1002 do_sendfile+0xb13/0x12c0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Fix this issue by checking return value of jffs2_prealloc_raw_node_refs before calling jffs2_sum_write_data.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Jul 7, 2025 | Jul 4, 2025 |
| Oracle_linux | — | Upgrade kernel-uek | Sep 10, 2025 | Jul 4, 2025 |
| Redhat_linux | — | — | Jul 9, 2025 | Jul 4, 2025 |
| Suse | — | Upgrade dtb-xilinxUpgrade kernel-source-azureUpgrade kernel-default-livepatch-develUpgrade kernel-kvmsmallUpgrade dlm-kmp-defaultUpgrade dtb-apmUpgrade dtb-alteraUpgrade kernel-source-rtUpgrade dlm-kmp-64kbUpgrade kernel-kvmsmall-develUpgrade kernel-64kb-optionalUpgrade dtb-lgUpgrade dtb-allwinnerUpgrade cluster-md-kmp-defaultUpgrade kernel-default-livepatchUpgrade reiserfs-kmp-rtUpgrade dtb-amdUpgrade kernel-zfcpdumpUpgrade kernel-azure-optionalUpgrade kselftests-kmp-64kbUpgrade kernel-syms-rtUpgrade dtb-socionextUpgrade kernel-debugUpgrade kernel-64kbUpgrade kernel-develUpgrade kernel-symsUpgrade kernel-macrosUpgrade kernel-azure-extraUpgrade ocfs2-kmp-azureUpgrade kernel-default-baseUpgrade kernel-default-develUpgrade kernel-debug-develUpgrade kernel-obs-qaUpgrade dtb-marvellUpgrade ocfs2-kmp-64kbUpgrade kernel-rt_debug-develUpgrade dtb-amazonUpgrade reiserfs-kmp-64kbUpgrade kernel-sourceUpgrade dtb-hisiliconUpgrade dtb-broadcomUpgrade cluster-md-kmp-azureUpgrade dtb-appleUpgrade reiserfs-kmp-defaultUpgrade ocfs2-kmp-rtUpgrade kernel-docs-htmlUpgrade dtb-freescaleUpgrade kernel-devel-rtUpgrade kernel-rt_debugUpgrade kernel-64kb-develUpgrade ocfs2-kmp-defaultUpgrade dtb-renesasUpgrade gfs2-kmp-64kbUpgrade gfs2-kmp-rtUpgrade kernel-default-extraUpgrade kernel-azureUpgrade dtb-nvidiaUpgrade kernel-default-vdsoUpgrade kernel-64kb-extraUpgrade gfs2-kmp-azureUpgrade kernel-rt-develUpgrade kernel-kvmsmall-vdsoUpgrade kernel-docsUpgrade kernel-devel-azureUpgrade kernel-default-optionalUpgrade dtb-sprdUpgrade kselftests-kmp-defaultUpgrade kernel-azure-vdsoUpgrade kernel-rt_debug-vdsoUpgrade gfs2-kmp-defaultUpgrade dtb-caviumUpgrade kernel-azure-develUpgrade dtb-rockchipUpgrade cluster-md-kmp-64kbUpgrade kernel-rt-livepatch-develUpgrade kernel-source-vanillaUpgrade dtb-exynosUpgrade dtb-armUpgrade cluster-md-kmp-rtUpgrade kernel-rt-optionalUpgrade dtb-qcomUpgrade dtb-amlogicUpgrade kernel-debug-vdsoUpgrade kernel-default-base-rebuildUpgrade kernel-defaultUpgrade dtb-mediatekUpgrade dlm-kmp-azureUpgrade kselftests-kmp-azureUpgrade kernel-syms-azureUpgrade kernel-rt-extraUpgrade kernel-rtUpgrade kernel-obs-buildUpgrade kernel-rt-vdsoUpgrade kselftests-kmp-rtUpgrade dlm-kmp-rtUpgrade reiserfs-kmp-azure | Dec 5, 2025 | Aug 18, 2025 |
| Ubuntu | — | Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-azure-fips-6.8Upgrade linux-image-aws-64k-6.8Upgrade linux-image-5.15.0-156-generic-64kUpgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-5.15.0-156-generic-lpaeUpgrade linux-image-generic-64kUpgrade linux-image-aws-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-gke-5.15Upgrade linux-image-raspi-realtimeUpgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-nvidiaUpgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-nvidia-5.15Upgrade linux-image-5.15.0-156-lowlatencyUpgrade linux-image-6.8.0-1046-awsUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-5.15.0-1092-aws-fipsUpgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-gcpUpgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-azure-fipsUpgrade linux-image-ibm-classicUpgrade linux-image-virtual-6.14Upgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-5.15.0-1088-kvmUpgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-azureUpgrade linux-image-oem-6.14Upgrade linux-image-6.14.0-1018-gcpUpgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-oracle-64kUpgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-5.15.0-1092-realtimeUpgrade linux-image-oem-22.04aUpgrade linux-image-oem-22.04bUpgrade linux-image-5.15.0-156-lowlatency-64kUpgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-aws-64k-5.15Upgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-5.15.0-1086-raspiUpgrade linux-image-fips-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-gke-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-raspi-6.14Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-oem-24.04cUpgrade linux-image-raspiUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-ibm-6.8Upgrade linux-image-5.15.0-1087-nvidia-lowlatencyUpgrade linux-image-5.15.0-1096-azure-fipsUpgrade linux-image-5.15.0-1087-nvidiaUpgrade linux-image-oem-22.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-5.15.0-1085-intel-iot-realtimeUpgrade linux-image-oracle-5.15Upgrade linux-image-raspi-nolpaeUpgrade linux-image-6.14.0-1015-oracle-64kUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-5.15.0-156-fipsUpgrade linux-image-6.8.0-1046-azureUpgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-azure-nvidiaUpgrade linux-image-oem-24.04bUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-5.15.0-1034-nvidia-tegra-igxUpgrade linux-image-nvidia-tegraUpgrade linux-image-oem-22.04cUpgrade linux-image-5.15.0-156-genericUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-generic-lpaeUpgrade linux-image-gcp-fipsUpgrade linux-image-ibmUpgrade linux-image-azure-nvidia-6.14Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-fips-5.15Upgrade linux-image-kvmUpgrade linux-image-5.15.0-1056-xilinx-zynqmpUpgrade linux-image-5.15.0-1086-ibmUpgrade linux-image-xilinxUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.14.0-1015-aws-64kUpgrade linux-image-6.14.0-1014-realtimeUpgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-100-fipsUpgrade linux-image-aws-lts-22.04Upgrade linux-image-6.8.0-100-genericUpgrade linux-image-oracle-64k-6.14Upgrade linux-image-generic-64k-6.8Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-5.15.0-1075-gkeopUpgrade linux-image-5.15.0-1092-awsUpgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-virtual-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-gcp-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-azure-cvmUpgrade linux-image-aws-64k-6.14Upgrade linux-image-5.15.0-1087-intel-iotgUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-6.14.0-1014-oemUpgrade linux-image-5.15.0-1092-gcpUpgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-virtualUpgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-generic-6.14Upgrade linux-image-gcp-6.8Upgrade linux-image-6.14.0-1015-oracleUpgrade linux-image-oem-24.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-gcp-6.14Upgrade linux-image-gkeopUpgrade linux-image-lowlatency-5.15Upgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-6.14.0-1014-azureUpgrade linux-image-gcp-fips-5.15Upgrade linux-image-aws-fips-5.15Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-gcp-5.15Upgrade linux-image-azure-6.14Upgrade linux-image-aws-6.14Upgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-5.15.0-1045-nvidia-tegraUpgrade linux-image-virtual-5.15Upgrade linux-image-realtime-6.14Upgrade linux-image-oracleUpgrade linux-image-gke-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-generic-64k-5.15Upgrade linux-image-intelUpgrade linux-image-genericUpgrade linux-image-aws-fipsUpgrade linux-image-5.15.0-1092-gcp-fipsUpgrade linux-image-6.14.0-1007-azure-nvidiaUpgrade linux-image-5.15.0-1092-aws-64kUpgrade linux-image-5.15.0-1090-oracleUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-generic-64k-6.14Upgrade linux-image-oracle-6.14Upgrade linux-image-gkeUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-azure-6.8Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-6.14.0-34-genericUpgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-gkeop-5.15Upgrade linux-image-lowlatency-6.8Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-6.14.0-34-generic-64kUpgrade linux-image-xilinx-6.8Upgrade linux-image-gcp-64k-6.14Upgrade linux-image-azure-fips-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-fipsUpgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-ibm-5.15Upgrade linux-image-generic-5.15Upgrade linux-image-6.14.0-1015-awsUpgrade linux-image-realtime-6.8.1Upgrade linux-image-aws-lts-24.04Upgrade linux-image-realtimeUpgrade linux-image-5.15.0-1045-nvidia-tegra-rtUpgrade linux-image-5.15.0-1034-nvidia-tegra-igx-rtUpgrade linux-image-awsUpgrade linux-image-nvidia-6.8Upgrade linux-image-6.14.0-1016-raspiUpgrade linux-image-oem-22.04dUpgrade linux-image-kvm-5.15Upgrade linux-image-5.15.0-1096-azureUpgrade linux-image-realtime-5.15Upgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-6.14.0-1018-gcp-64kUpgrade linux-image-raspi-5.15Upgrade linux-image-gke-64k-6.8Upgrade linux-image-aws-64kUpgrade linux-image-generic-lpae-5.15Upgrade linux-image-oracle-6.8Upgrade linux-image-5.15.0-1089-gkeUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-raspi-6.8Upgrade linux-image-aws-5.15Upgrade linux-image-nvidia-lowlatency-6.8 | Jul 9, 2025 | Jul 4, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 10, 2025 | Jul 4, 2025 |
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