Oracle Linux: CVE-2024-35900: ELSA-2024-5101: kernel security update (IMPORTANT) (Multiple Advisories)

Oracle Linux: CVE-2024-35900: ELSA-2024-5101:kernel security update (IMPORTANT) (Multiple Advisories)

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

05/19/2024

Created

08/20/2024

Added

08/16/2024

Modified

11/29/2024

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]

Solution(s)

• oracle-linux-upgrade-kernel

References

• https://attackerkb.com/topics/cve-2024-35900
• CVE - 2024-35900
• ELSA-2024-5101