CVE-2024-43846

Summary

In the Linux kernel, the following vulnerability has been resolved:

lib: objagg: Fix general protection fault

The library supports aggregation of objects into other objects only if the parent object does not have a parent itself. That is, nesting is not supported.

Aggregation happens in two cases: Without and with hints, where hints are a pre-computed recommendation on how to aggregate the provided objects.

Nesting is not possible in the first case due to a check that prevents it, but in the second case there is no check because the assumption is that nesting cannot happen when creating objects based on hints. The violation of this assumption leads to various warnings and eventually to a general protection fault [1].

Before fixing the root cause, error out when nesting happens and warn.

[1] general protection fault, probably for non-canonical address 0xdead000000000d90: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 1083 Comm: kworker/1:9 Tainted: G W 6.9.0-rc6-custom-gd9b4f1cca7fb #7 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP: 0010:mlxsw_sp_acl_erp_bf_insert+0x25/0x80 […] Call Trace: <TASK> mlxsw_sp_acl_atcam_entry_add+0x256/0x3c0 mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0 mlxsw_sp_acl_tcam_vchunk_migrate_one+0x16b/0x270 mlxsw_sp_acl_tcam_vregion_rehash_work+0xbe/0x510 process_one_work+0x151/0x370 worker_thread+0x2cb/0x3e0 kthread+0xd0/0x100 ret_from_fork+0x34/0x50 ret_from_fork_asm+0x1a/0x30 </TASK>

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9069a3817d82b01b3a55da382c774e3575946130 < 8161263362154cbebfbf4808097b956a6a8cb98aaffected
LinuxLinux9069a3817d82b01b3a55da382c774e3575946130 < 22ae17a267f4812861f0c644186c3421ff97dbfcaffected
LinuxLinux9069a3817d82b01b3a55da382c774e3575946130 < 565213e005557eb6cc4e42189d26eb300e02f170affected
LinuxLinux9069a3817d82b01b3a55da382c774e3575946130 < 5adc61d29bbb461d7f7c2b48dceaa90ecd182eb7affected
LinuxLinux9069a3817d82b01b3a55da382c774e3575946130 < 1936fa05a180834c3b52e0439a6bddc07814d3ebaffected
LinuxLinux9069a3817d82b01b3a55da382c774e3575946130 < 499f742fed42e74f1321f4b12ca196a66a2b49fcaffected
LinuxLinux9069a3817d82b01b3a55da382c774e3575946130 < b4a3a89fffcdf09702b1f161b914e52abca1894daffected
LinuxLinux5.1affected
LinuxLinux0 < 5.1unaffected
LinuxLinux5.4.282 <= 5.4.*unaffected
LinuxLinux5.10.224 <= 5.10.*unaffected
LinuxLinux5.15.165 <= 5.15.*unaffected
LinuxLinux6.1.103 <= 6.1.*unaffected
LinuxLinux6.6.44 <= 6.6.*unaffected
LinuxLinux6.10.3 <= 6.10.*unaffected
LinuxLinux6.11 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References