CVE-2024-35900

MEDIUM
Published May 19, 2024 Modified May 12, 2026

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject new basechain after table flag update When dormant flag is toggled, hooks are disabled in the commit phase by iterating over current chains in table (existing and new). The following configuration allows for an inconsistent state: add table x add chain x y { type filter hook input priority 0; } add table x { flags dormant; } add chain x w { type filter hook input priority 1; } which triggers the following warning when trying to unregister chain w which is already unregistered. [ 127.322252] WARNING: CPU: 7 PID: 1211 at net/netfilter/core.c:50 1 __nf_unregister_net_hook+0x21a/0x260 [...] [ 127.322519] Call Trace: [ 127.322521] <TASK> [ 127.322524] ? __warn+0x9f/0x1a0 [ 127.322531] ? __nf_unregister_net_hook+0x21a/0x260 [ 127.322537] ? report_bug+0x1b1/0x1e0 [ 127.322545] ? handle_bug+0x3c/0x70 [ 127.322552] ? exc_invalid_op+0x17/0x40 [ 127.322556] ? asm_exc_invalid_op+0x1a/0x20 [ 127.322563] ? kasan_save_free_info+0x3b/0x60 [ 127.322570] ? __nf_unregister_net_hook+0x6a/0x260 [ 127.322577] ? __nf_unregister_net_hook+0x21a/0x260 [ 127.322583] ? __nf_unregister_net_hook+0x6a/0x260 [ 127.322590] ? __nf_tables_unregister_hook+0x8a/0xe0 [nf_tables] [ 127.322655] nft_table_disable+0x75/0xf0 [nf_tables] [ 127.322717] nf_tables_commit+0x2571/0x2620 [nf_tables]

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
debian debian_linux

References

Advisories & Patches

https://git.kernel.org/stable/c/41bad13c0e8a5a2b47a7472cced922555372daab https://git.kernel.org/stable/c/420132bee3d0136b7fba253a597b098fe15493a7 https://git.kernel.org/stable/c/6d12f21f8bbe23fde25b77c2bf5973c136b8bef8 https://git.kernel.org/stable/c/745cf6a843896cdac8766c74379300ed73c78830 https://git.kernel.org/stable/c/7b6fba6918714afee3e17796113ccab636255c7b https://git.kernel.org/stable/c/8ba81dca416adf82fc5a2a23abc1a8cc02ad32fb https://git.kernel.org/stable/c/994209ddf4f430946f6247616b2e33d179243769 https://git.kernel.org/stable/c/e95bb4cba94c018be24b11f017d1c55dd6cda31a https://git.kernel.org/stable/c/41bad13c0e8a5a2b47a7472cced922555372daab https://git.kernel.org/stable/c/420132bee3d0136b7fba253a597b098fe15493a7 https://git.kernel.org/stable/c/6d12f21f8bbe23fde25b77c2bf5973c136b8bef8 https://git.kernel.org/stable/c/745cf6a843896cdac8766c74379300ed73c78830 https://git.kernel.org/stable/c/7b6fba6918714afee3e17796113ccab636255c7b https://git.kernel.org/stable/c/8ba81dca416adf82fc5a2a23abc1a8cc02ad32fb https://git.kernel.org/stable/c/994209ddf4f430946f6247616b2e33d179243769 https://git.kernel.org/stable/c/e95bb4cba94c018be24b11f017d1c55dd6cda31a

Frequently Asked Questions

What is CVE-2024-35900? +
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject new basechain after table flag update When dormant flag is toggled, hooks are disabled in the commit phase by iterating over current chains in table (existing and new). The following configuration allows for an inconsistent state: add table x add chain x y { type filter hook input priority 0; } add table x { flags dormant; } add chain x w { type filter hook input priority 1; } which triggers the following warning when trying to unregister chain w which is already unregistered. [ 127.322252] WARNING: CPU: 7 PID: 1211 at net/netfilter/core.c:50 1 __nf_unregister_net_hook+0x21a/0x260 [...] [ 127.322519] Call Trace: [ 127.322521] <TASK> [ 127.322524] ? __warn+0x9f/0x1a0 [ 127.322531] ? __nf_unregister_net_hook+0x21a/0x260 [ 127.322537] ? report_bug+0x1b1/0x1e0 [ 127.322545] ? handle_bug+0x3c/0x70 [ 127.322552] ? exc_invalid_op+0x17/0x40 [ 127.322556] ? asm_exc_invalid_op+0x1a/0x20 [ 127.322563] ? kasan_save_free_info+0x3b/0x60 [ 127.322570] ? __nf_unregister_net_hook+0x6a/0x260 [ 127.322577] ? __nf_unregister_net_hook+0x21a/0x260 [ 127.322583] ? __nf_unregister_net_hook+0x6a/0x260 [ 127.322590] ? __nf_tables_unregister_hook+0x8a/0xe0 [nf_tables] [ 127.322655] nft_table_disable+0x75/0xf0 [nf_tables] [ 127.322717] nf_tables_commit+0x2571/0x2620 [nf_tables] It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2024-35900? +
CVE-2024-35900 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-35900? +
CVE-2024-35900 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-35900? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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