CVE-2026-98014
- Source
- https://cve.org/CVERecord?id=CVE-2026-98014
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98014.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-98014
- Downstream
- Related
- Published
- 2026-09-25T10:23:37Z
- Modified
- 2026-10-09T17:26:55Z
- Summary
- net/mlx5: E-Switch, prevent mc_list repopulation during vport disable
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: E-Switch, prevent mc_list repopulation during vport disable
In mlx5_esw_vport_disable(), move esw_apply_vport_rx_mode() ahead of esw_vport_change_handle_locked() so vport->allmulti_rule is NULL before the change handler observes it.
During FW-fatal recovery the disable runs while dev->state == INTERNAL_ERROR. The promisc query inside esw_update_vport_rx_mode() fails and returns early, leaving vport->allmulti_rule intact, so esw_update_vport_mc_promisc() runs and adds MLX5_ACTION_ADD entries to vport->mc_list whose flow rules are then installed in the FDB by esw_add_mc_addr(). esw_destroy_legacy_table() tears down the FDB with those refs still held, corrupting the sub-tree and leaving dangling flow_rule pointers in vport->mc_list.
Two-stage failure on
echo 1 > /sys/bus/pci/devices/<bdf>/reset:refcount_t: underflow; use-after-free. tree_put_node+0xef/0x110 [mlx5_core] clean_tree+0x44/0xd0 [mlx5_core] (x5) mlx5_fs_core_cleanup+0x57/0x1c0 [mlx5_core] mlx5_unload+0x65/0xd0 [mlx5_core] ... mlx5_health_try_recover
BUG: unable to handle page fault for address: 0000000003000055 down_write+0x1c/0x60 mlx5_del_flow_rules+0x33/0x1f0 [mlx5_core] esw_del_mc_addr+0x7b/0x170 [mlx5_core] esw_apply_vport_addr_list+0x56/0xf0 [mlx5_core] esw_vport_change_handle_locked+0x28b/0x310 [mlx5_core] mlx5_esw_vport_enable+0x270/0x4a0 [mlx5_core] ... mlx5_load ... mlx5_health_try_recover
esw_apply_vport_rx_mode(false, false) clears vport->allmulti_rule via its local state machine even when the FW del fails. With the rule NULL the !IS_ERR_OR_NULL(allmulti_rule) gate in the change handler closes, no rules are installed during disable, and the reload starts with a clean mc_list.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98014.json" }- References
-
- https://git.kernel.org/stable/c/2196f9d3358b00fcb28835a5fde14071f51ecb96
- https://git.kernel.org/stable/c/413e04adcc1fd263cf02b1b83b4a0dbdc66bcee9
- https://git.kernel.org/stable/c/5a2b87dfceccf9065157a14a599d395c2b6281b8
- https://git.kernel.org/stable/c/668e050429c7ca688cf4e7112f97f0cd269d446b
- https://git.kernel.org/stable/c/69904608e25e8ba58111aadd9210892cf3876201
- https://git.kernel.org/stable/c/72cfcb79026cffb6490f5044153a841d360b0cfc
- https://git.kernel.org/stable/c/c0c6f4ba8a37688f7b4d4044898d88f0450d44c2
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98014.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-98014
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced4df1f2d36bdc9a368650bf14b9097c555e95f71dFixed413e04adcc1fd263cf02b1b83b4a0dbdc66bcee9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced63546395a0e6ac264f78f65218086ce6014b4494Fixed2196f9d3358b00fcb28835a5fde14071f51ecb96
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced922f56e9a795d6f3dd72d3428ebdd7ee040fa855Fixed5a2b87dfceccf9065157a14a599d395c2b6281b8Fixed69904608e25e8ba58111aadd9210892cf3876201Fixed72cfcb79026cffb6490f5044153a841d360b0cfcFixed668e050429c7ca688cf4e7112f97f0cd269d446bFixedc0c6f4ba8a37688f7b4d4044898d88f0450d44c2
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.15.105Fixed5.15.222
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.1.22Fixed6.1.189
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.10.177Fixed5.11
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.2.9Fixed6.3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced18cead61e437f4c7898acca0a5f3df12f801d97f
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6f5780536181d1d0d09a11a1bc92f22e143447e2
Affected versions
v5.*
v6.*
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed5.15.222
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.189
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.158
- Type
- ECOSYSTEM
- Events
-
Introduced6.3.0Fixed6.12.111
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.18.53
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed7.2.7