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 linux-6.1Upgrade linux | 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-apmUpgrade kernel-source-azureUpgrade ocfs2-kmp-defaultUpgrade dtb-allwinnerUpgrade dtb-renesasUpgrade kernel-64kb-develUpgrade dtb-amazonUpgrade dtb-appleUpgrade dlm-kmp-defaultUpgrade kernel-devel-rtUpgrade dtb-xilinxUpgrade kernel-docs-htmlUpgrade kernel-rt_debug-develUpgrade kernel-default-livepatchUpgrade ocfs2-kmp-azureUpgrade kernel-default-develUpgrade cluster-md-kmp-azureUpgrade ocfs2-kmp-rtUpgrade kernel-default-extraUpgrade kernel-syms-rtUpgrade dtb-lgUpgrade gfs2-kmp-64kbUpgrade reiserfs-kmp-defaultUpgrade dtb-amdUpgrade kernel-debug-develUpgrade dtb-marvellUpgrade dtb-hisiliconUpgrade kernel-obs-qaUpgrade dtb-broadcomUpgrade ocfs2-kmp-64kbUpgrade kernel-64kbUpgrade kernel-kvmsmallUpgrade kernel-kvmsmall-develUpgrade kernel-default-livepatch-develUpgrade gfs2-kmp-rtUpgrade kernel-symsUpgrade kernel-debugUpgrade kernel-64kb-optionalUpgrade dtb-socionextUpgrade reiserfs-kmp-rtUpgrade kernel-azure-optionalUpgrade kselftests-kmp-64kbUpgrade kernel-default-baseUpgrade dtb-freescaleUpgrade kernel-azure-extraUpgrade kernel-macrosUpgrade kernel-develUpgrade dlm-kmp-64kbUpgrade kernel-source-rtUpgrade reiserfs-kmp-64kbUpgrade dtb-alteraUpgrade kernel-sourceUpgrade kernel-rt_debugUpgrade kernel-zfcpdumpUpgrade cluster-md-kmp-defaultUpgrade kernel-default-vdsoUpgrade kernel-syms-azureUpgrade dtb-qcomUpgrade kernel-rt-vdsoUpgrade kselftests-kmp-azureUpgrade kernel-rtUpgrade kernel-obs-buildUpgrade kernel-64kb-extraUpgrade dlm-kmp-azureUpgrade kernel-rt-extraUpgrade dtb-mediatekUpgrade kernel-rt_debug-vdsoUpgrade kernel-default-base-rebuildUpgrade kernel-debug-vdsoUpgrade dtb-amlogicUpgrade kernel-defaultUpgrade dtb-sprdUpgrade kernel-docsUpgrade kernel-azureUpgrade kselftests-kmp-defaultUpgrade kernel-rt-develUpgrade kernel-kvmsmall-vdsoUpgrade kernel-devel-azureUpgrade kernel-default-optionalUpgrade dtb-armUpgrade cluster-md-kmp-rtUpgrade kernel-rt-optionalUpgrade kernel-azure-vdsoUpgrade dtb-exynosUpgrade kernel-rt-livepatch-develUpgrade cluster-md-kmp-64kbUpgrade kernel-source-vanillaUpgrade dtb-rockchipUpgrade kernel-azure-develUpgrade gfs2-kmp-defaultUpgrade dtb-caviumUpgrade kselftests-kmp-rtUpgrade gfs2-kmp-azureUpgrade dtb-nvidiaUpgrade dlm-kmp-rtUpgrade reiserfs-kmp-azure | Dec 5, 2025 | Aug 18, 2025 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1046-awsUpgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-nvidia-tegraUpgrade linux-image-6.14.0-1015-aws-64kUpgrade linux-image-kvmUpgrade linux-image-6.14.0-1015-oracle-64kUpgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-5.15.0-156-lowlatency-64kUpgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-azureUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-azure-nvidia-6.14Upgrade linux-image-oem-6.14Upgrade linux-image-6.14.0-1018-gcpUpgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-aws-lts-22.04Upgrade linux-image-fips-5.15Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-azure-nvidiaUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-5.15.0-1034-nvidia-tegra-igxUpgrade linux-image-5.15.0-156-lowlatencyUpgrade linux-image-6.8.0-100-genericUpgrade linux-image-xilinxUpgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-5.15Upgrade linux-image-aws-6.8Upgrade linux-image-5.15.0-156-genericUpgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-aws-64k-6.8Upgrade linux-image-5.15.0-156-generic-lpaeUpgrade linux-image-gke-5.15Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-5.15.0-1087-nvidia-lowlatencyUpgrade linux-image-5.15.0-1096-azure-fipsUpgrade linux-image-raspi-6.14Upgrade linux-image-nvidia-64kUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-oem-22.04Upgrade linux-image-ibmUpgrade linux-image-oem-24.04cUpgrade linux-image-azure-fips-6.8Upgrade linux-image-oem-24.04bUpgrade linux-image-lowlatencyUpgrade linux-image-oem-22.04cUpgrade linux-image-azure-fipsUpgrade linux-image-oem-24.04aUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-generic-64k-6.8Upgrade linux-image-5.15.0-156-generic-64kUpgrade linux-image-fips-6.8Upgrade linux-image-raspiUpgrade linux-image-ibm-6.8Upgrade linux-image-5.15.0-1085-intel-iot-realtimeUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-aws-64k-5.15Upgrade linux-image-5.15.0-1087-nvidiaUpgrade linux-image-virtual-6.14Upgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-generic-6.8Upgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-oracle-64k-6.14Upgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-generic-64kUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-gcp-fipsUpgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1051-azureUpgrade linux-image-azure-lts-22.04Upgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-6.14.0-1014-realtimeUpgrade linux-image-raspi-nolpaeUpgrade linux-image-oracle-5.15Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-5.15.0-156-fipsUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-aws-fips-6.8Upgrade linux-image-oem-22.04bUpgrade linux-image-oracle-64kUpgrade linux-image-5.15.0-1086-raspiUpgrade linux-image-gke-64kUpgrade linux-image-5.15.0-1086-ibmUpgrade linux-image-5.15.0-1088-kvmUpgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-6.8.0-1046-azureUpgrade linux-image-5.15.0-1092-realtimeUpgrade linux-image-5.15.0-1092-aws-fipsUpgrade linux-image-oem-22.04aUpgrade linux-image-5.15.0-1056-xilinx-zynqmpUpgrade linux-image-6.8.0-100-fipsUpgrade linux-image-gcpUpgrade linux-image-oracle-6.8Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-gcp-64k-6.14Upgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-realtime-6.8.1Upgrade linux-image-realtimeUpgrade linux-image-6.14.0-1014-azureUpgrade linux-image-gcp-5.15Upgrade linux-image-gkeopUpgrade linux-image-gkeUpgrade linux-image-generic-lpae-5.15Upgrade linux-image-aws-64kUpgrade linux-image-awsUpgrade linux-image-6.14.0-1018-gcp-64kUpgrade linux-image-6.14.0-1016-raspiUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-realtime-5.15Upgrade linux-image-raspi-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-6.8Upgrade linux-image-lowlatency-6.8Upgrade linux-image-fipsUpgrade linux-image-azure-5.15Upgrade linux-image-aws-5.15Upgrade linux-image-6.14.0-34-generic-64kUpgrade linux-image-xilinx-6.8Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-gkeop-5.15Upgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-azure-fips-5.15Upgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-kvm-5.15Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gke-64k-6.8Upgrade linux-image-5.15.0-1089-gkeUpgrade linux-image-oracleUpgrade linux-image-azure-6.14Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-virtualUpgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-ibm-5.15Upgrade linux-image-generic-5.15Upgrade linux-image-5.15.0-1092-awsUpgrade linux-image-6.14.0-1015-awsUpgrade linux-image-5.15.0-1045-nvidia-tegra-rtUpgrade linux-image-5.15.0-1034-nvidia-tegra-igx-rtUpgrade linux-image-azure-6.8Upgrade linux-image-oracle-6.14Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-aws-lts-24.04Upgrade linux-image-aws-fips-5.15Upgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-5.15.0-1045-nvidia-tegraUpgrade linux-image-realtime-6.14Upgrade linux-image-gke-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-generic-64k-6.14Upgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-6.14.0-34-genericUpgrade linux-image-virtual-6.8Upgrade linux-image-raspi-5.15Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-oem-24.04Upgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-generic-64k-5.15Upgrade linux-image-lowlatency-5.15Upgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-genericUpgrade linux-image-aws-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-5.15.0-1092-gcp-fipsUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-intelUpgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-generic-6.14Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-gcp-6.8Upgrade linux-image-gcp-6.14Upgrade linux-image-6.14.0-1015-oracleUpgrade linux-image-5.15.0-1092-gcpUpgrade linux-image-6.14.0-1014-oemUpgrade linux-image-5.15.0-1075-gkeopUpgrade linux-image-virtual-5.15Upgrade linux-image-aws-6.14Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-aws-64k-6.14Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-azure-cvmUpgrade linux-image-5.15.0-1087-intel-iotgUpgrade linux-image-intel-iotgUpgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-5.15.0-1096-azureUpgrade linux-image-lowlatency-hwe-22.04 | 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 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub