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CVE-2024-42109— netfilter: nf_tables: unconditionally flush pending work before notifier

AI Predicted 4.9 Difficulty: Hard EPSS 0.01% · P3

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinuxf22954f8c58fd5f5489f5980796914e306757e77< 3325628cb36b7f216c5716e7b5124d9dc81199e4affected
41841b585e53babdfb0fa6fdfa54f6d7c28c1206< 4c06c13317b9a08decedcd7aaf706691e336277caffected
2c9f0293280e258606e54ed2b96fa71498432eae< 55a40406aac555defe9bdd0adec9508116ce7cb1affected
2c9f0293280e258606e54ed2b96fa71498432eae< 09e650c3a3a7d804430260510534ccbf71c75b2eaffected
2c9f0293280e258606e54ed2b96fa71498432eae< 9f6958ba2e902f9820c594869bd710ba74b7c4c0affected
4167aa477abcf62b0dfda51f3513280fa73cd588affected
5.15.129< 5.15.163affected
6.1.50< 6.1.98affected
… +8 more rows
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I. Basic Information for CVE-2024-42109

Vulnerability Information
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Vulnerability Title
netfilter: nf_tables: unconditionally flush pending work before notifier
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: unconditionally flush pending work before notifier syzbot reports: KASAN: slab-uaf in nft_ctx_update include/net/netfilter/nf_tables.h:1831 KASAN: slab-uaf in nft_commit_release net/netfilter/nf_tables_api.c:9530 KASAN: slab-uaf int nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597 Read of size 2 at addr ffff88802b0051c4 by task kworker/1:1/45 [..] Workqueue: events nf_tables_trans_destroy_work Call Trace: nft_ctx_update include/net/netfilter/nf_tables.h:1831 [inline] nft_commit_release net/netfilter/nf_tables_api.c:9530 [inline] nf_tables_trans_destroy_work+0x152b/0x1750 net/netfilter/nf_tables_api.c:9597 Problem is that the notifier does a conditional flush, but its possible that the table-to-be-removed is still referenced by transactions being processed by the worker, so we need to flush unconditionally. We could make the flush_work depend on whether we found a table to delete in nf-next to avoid the flush for most cases. AFAICS this problem is only exposed in nf-next, with commit e169285f8c56 ("netfilter: nf_tables: do not store nft_ctx in transaction objects"), with this commit applied there is an unconditional fetch of table->family which is whats triggering the above splat.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于netfilter:nf_tables模块中在通知删除表之前，待处理的工作没有被无条件地刷新，可能导致释放后重用问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux f22954f8c58fd5f5489f5980796914e306757e77 ~ 3325628cb36b7f216c5716e7b5124d9dc81199e4 -
LinuxLinux 6.5 -

II. Public POCs for CVE-2024-42109

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III. Intelligence Information for CVE-2024-42109

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Other References for CVE-2024-42109 (5)

Same Patch Batch · Linux · 2024-07-30 · 70 CVEs total

CVE-2024-42146drm/xe: Add outer runtime_pm protection to xe_live_ktest@xe_dma_buf
CVE-2024-42227drm/amd/display: Fix overlapping copy within dml_core_mode_programming
CVE-2024-42225wifi: mt76: replace skb_put with skb_put_zero
CVE-2024-42153i2c: pnx: Fix potential deadlock warning from del_timer_sync() call in isr
CVE-2024-42152nvmet: fix a possible leak when destroy a ctrl during qp establishment
CVE-2024-42151bpf: mark bpf_dummy_struct_ops.test_1 parameter as nullable
CVE-2024-42150net: txgbe: remove separate irq request for MSI and INTx
CVE-2024-42149fs: don't misleadingly warn during thaw operations
CVE-2024-42148bnx2x: Fix multiple UBSAN array-index-out-of-bounds
CVE-2024-42147crypto: hisilicon/debugfs - Fix debugfs uninit process issue
CVE-2024-42154tcp_metrics: validate source addr length
CVE-2024-42145IB/core: Implement a limit on UMAD receive List
CVE-2024-42144thermal/drivers/mediatek/lvts_thermal: Check NULL ptr on lvts_data
CVE-2024-42142net/mlx5: E-switch, Create ingress ACL when needed
CVE-2024-42141Bluetooth: ISO: Check socket flag instead of hcon
CVE-2024-42140riscv: kexec: Avoid deadlock in kexec crash path
CVE-2024-42138mlxsw: core_linecards: Fix double memory deallocation in case of invalid INI file
CVE-2024-42139ice: Fix improper extts handling
CVE-2024-42137Bluetooth: qca: Fix BT enable failure again for QCA6390 after warm reboot
CVE-2024-42136cdrom: rearrange last_media_change check to avoid unintentional overflow

Showing top 20 of 70 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-42109

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