In the Linux kernel, the following vulnerability has been resolved:
ext4: avoid OOB when system.data xattr changes underneath the filesystem
When looking up for an entry in an inlined directory, if e_value_offs is changed underneath the filesystem by some change in the block device, it will lead to an out-of-bounds access that KASAN detects as an UAF.
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 2048 to 2047 ================================================================== BUG: KASAN: use-after-free in ext4_search_dir+0xf2/0x1c0 fs/ext4/namei.c:1500 Read of size 1 at addr ffff88803e91130f by task syz-executor269/5103
CPU: 0 UID: 0 PID: 5103 Comm: syz-executor269 Not tainted 6.11.0-rc4-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ext4_search_dir+0xf2/0x1c0 fs/ext4/namei.c:1500 ext4_find_inline_entry+0x4be/0x5e0 fs/ext4/inline.c:1697 __ext4_find_entry+0x2b4/0x1b30 fs/ext4/namei.c:1573 ext4_lookup_entry fs/ext4/namei.c:1727 [inline] ext4_lookup+0x15f/0x750 fs/ext4/namei.c:1795 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1633 filename_create+0x297/0x540 fs/namei.c:3980 do_symlinkat+0xf9/0x3a0 fs/namei.c:4587 __do_sys_symlinkat fs/namei.c:4610 [inline] __se_sys_symlinkat fs/namei.c:4607 [inline] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4607 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3e73ced469 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff4d40c258 EFLAGS: 00000246 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0032656c69662f2e RCX: 00007f3e73ced469 RDX: 0000000020000200 RSI: 00000000ffffff9c RDI: 00000000200001c0 RBP: 0000000000000000 R08: 00007fff4d40c290 R09: 00007fff4d40c290 R10: 0023706f6f6c2f76 R11: 0000000000000246 R12: 00007fff4d40c27c R13: 0000000000000003 R14: 431bde82d7b634db R15: 00007fff4d40c2b0 </TASK>
Calling ext4_xattr_ibody_find right after reading the inode with ext4_get_inode_loc will lead to a check of the validity of the xattrs, avoiding this problem.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade perf-debuginfoUpgrade python-perf-debuginfoUpgrade kernelUpgrade kernel-livepatch-4.14.355-275.582Upgrade kernel-livepatch-5.15.168-114.166Upgrade kernel-develUpgrade kernel-tools-develUpgrade bpftool-debuginfoUpgrade kernel-debuginfoUpgrade kernel-toolsUpgrade kernel-debuginfo-common-x86_64Upgrade python-perfUpgrade kernel-livepatch-5.10.227-219.884Upgrade bpftoolUpgrade kernel-tools-debuginfo | Jan 22, 2025 | Oct 21, 2024 |
| Amazon_linux | — | Upgrade kernel | Feb 6, 2025 | Oct 21, 2024 |
| Amazon_linux_2023 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade kernel-livepatch-6.1.112-124.190Upgrade kernel-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-develUpgrade python3-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-libbpfUpgrade kernel-modules-extraUpgrade bpftoolUpgrade kernel-libbpf-develUpgrade kernel-modules-extra-commonUpgrade kernel-toolsUpgrade perfUpgrade python3-perfUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-livepatch-6.1.115-126.197Upgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64 | Feb 17, 2025 | Oct 21, 2024 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Nov 11, 2024 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade python3-perfUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade kernel-tools | Jan 14, 2025 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade python3-perfUpgrade kernel-toolsUpgrade bpftoolUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelists | Feb 11, 2025 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade python3-perfUpgrade kernelUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-tools | Feb 11, 2025 | Oct 21, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernel-tools-libsUpgrade kernel-toolsUpgrade python3-perfUpgrade kernel | Jan 15, 2025 | Oct 21, 2024 |
| Oracle_linux | — | Upgrade kernel-uek | Dec 17, 2024 | Oct 21, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Oct 21, 2024 |
| Ubuntu | — | Upgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-6.8.0-1024-gcp-64kUpgrade linux-image-ibmUpgrade linux-image-5.4.0-208-generic-lpaeUpgrade linux-image-6.11.0-18-genericUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-gkeopUpgrade linux-image-gke-5.15Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-oem-20.04bUpgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-4.4.0-1145-kvmUpgrade linux-image-oem-22.04bUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-6.8.0-1025-azure-fdeUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-5.4.0-1138-oracleUpgrade linux-image-6.8.0-1019-gkeUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-4.4.0-269-lowlatencyUpgrade linux-image-fipsUpgrade linux-image-gcp-fipsUpgrade linux-image-azure-nvidiaUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-oem-24.04bUpgrade linux-image-oem-24.04aUpgrade linux-image-6.8.0-54-generic-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1006-gkeopUpgrade linux-image-6.8.0-54-lowlatency-64kUpgrade linux-image-5.4.0-1058-xilinx-zynqmpUpgrade linux-image-5.15.0-1039-xilinx-zynqmpUpgrade linux-image-azure-lts-24.04Upgrade linux-image-oem-22.04cUpgrade linux-image-4.4.0-1182-awsUpgrade linux-image-ibm-lts-20.04Upgrade linux-image-raspiUpgrade linux-image-azureUpgrade linux-image-4.15.0-2082-gcp-fipsUpgrade linux-image-5.15.0-1068-nvidiaUpgrade linux-image-aws-lts-22.04Upgrade linux-image-azure-fipsUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-5.4.0-1143-gcpUpgrade linux-image-6.8.0-1022-nvidia-lowlatencyUpgrade linux-image-5.4.0-1129-raspiUpgrade linux-image-gcp-lts-20.04Upgrade linux-image-oem-20.04dUpgrade linux-image-4.15.0-238-genericUpgrade linux-image-oem-20.04cUpgrade linux-image-gcpUpgrade linux-image-genericUpgrade linux-image-6.8.0-1022-ibmUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-aws-lts-20.04Upgrade linux-image-6.8.0-1022-nvidia-lowlatency-64kUpgrade linux-image-4.15.0-1143-oracleUpgrade linux-image-virtual-hwe-16.04Upgrade linux-image-raspi2Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-generic-hwe-18.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-4.15.0-1189-azureUpgrade linux-image-gcp-lts-18.04Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-5.15.0-1070-gkeUpgrade linux-image-oem-22.04aUpgrade linux-image-oem-osp1Upgrade linux-image-generic-64kUpgrade linux-image-6.8.0-54-genericUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-4.15.0-238-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1024-gcpUpgrade linux-image-5.4.0-1086-ibmUpgrade linux-image-oem-22.04Upgrade linux-image-azure-lts-20.04Upgrade linux-image-aws-hweUpgrade linux-image-6.8.0-57-generic-64kUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-5.15.0-127-lowlatency-64kUpgrade linux-image-intelUpgrade linux-image-lowlatencyUpgrade linux-image-5.15.0-1068-nvidia-lowlatencyUpgrade linux-image-generic-lts-xenialUpgrade linux-image-5.15.0-1066-raspiUpgrade linux-image-5.15.0-1071-intel-iotgUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-nvidiaUpgrade linux-image-6.8.0-1022-nvidiaUpgrade linux-image-azure-fdeUpgrade linux-image-ibm-classicUpgrade linux-image-5.15.0-1066-ibmUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-5.4.0-1048-iotUpgrade linux-image-6.8.0-54-lowlatencyUpgrade linux-image-5.15.0-1071-oracleUpgrade linux-image-5.15.0-127-genericUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-oemUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-4.15.0-1174-gcpUpgrade linux-image-6.8.0-57-genericUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-realtimeUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-generic-hwe-20.04Upgrade linux-image-6.11.0-1009-awsUpgrade linux-image-oem-24.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-5.15.0-127-generic-64kUpgrade linux-image-6.8.0-1023-awsUpgrade linux-image-5.4.0-1142-awsUpgrade linux-image-4.15.0-1136-fipsUpgrade linux-image-intel-iotgUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-oracle-lts-20.04Upgrade linux-image-4.15.0-1164-kvmUpgrade linux-image-5.15.0-127-generic-lpaeUpgrade linux-image-oem-20.04Upgrade linux-image-generic-hwe-16.04Upgrade linux-image-6.8.0-1019-raspiUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-6.8.0-1025-azureUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-aws-lts-24.04Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-oracle-lts-18.04Upgrade linux-image-5.4.0-208-genericUpgrade linux-image-4.15.0-2098-azure-fipsUpgrade linux-image-awsUpgrade linux-image-5.4.0-1127-kvmUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-gkeop-5.15Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-4.4.0-1114-fipsUpgrade linux-image-6.8.0-1020-oracleUpgrade linux-image-gkeUpgrade linux-image-5.4.0-208-lowlatencyUpgrade linux-image-oem-22.04dUpgrade linux-image-aws-fipsUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-6.8.0-1020-oracle-64kUpgrade linux-image-aws-lts-18.04Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-5.15.0-1072-gcpUpgrade linux-image-5.15.0-127-lowlatencyUpgrade linux-image-5.4.0-1116-fipsUpgrade linux-image-4.4.0-269-genericUpgrade linux-image-oracleUpgrade linux-image-5.15.0-1073-awsUpgrade linux-image-4.15.0-2119-aws-fipsUpgrade linux-image-kvmUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.4.0-1099-bluefieldUpgrade linux-image-5.15.0-1078-azureUpgrade linux-image-4.4.0-1144-awsUpgrade linux-image-5.15.0-1070-kvmUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-1022-nvidia-64kUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1024-oemUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-bluefieldUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-4.15.0-1181-awsUpgrade linux-image-raspi-nolpaeUpgrade linux-image-azure-cvmUpgrade linux-image-raspi-hwe-18.04Upgrade linux-image-nvidia-64kUpgrade linux-image-azure-lts-18.04Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-5.15.0-1056-gkeopUpgrade linux-image-5.4.0-1140-awsUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-5.4.0-1145-azure | Dec 18, 2024 | Oct 21, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2025 | Oct 21, 2024 |
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