🛡️ AZL-69923 — kernel

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2023-53105 affecting package kernel 5.15.200.1-1

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

net/mlx5e: Fix cleanup null-ptr deref on encap lock

During module is unloaded while a peer tc flow is still offloaded,

first the peer uplink rep profile is changed to a nic profile, and so

neigh encap lock is destroyed. Next during unload, the VF reps netdevs

are unregistered which causes the original non-peer tc flow to be deleted,

which deletes the peer flow. The peer flow deletion detaches the encap

entry and try to take the already destroyed encap lock, causing the

below trace.

Fix this by clearing peer flows during tc eswitch cleanup

(mlx5e_tc_esw_cleanup()).

Relevant trace:

[ 4316.837128] BUG: kernel NULL pointer dereference, address: 00000000000001d8

[ 4316.842239] RIP: 0010:__mutex_lock+0xb5/0xc40

[ 4316.851897] Call Trace:

[ 4316.852481] <TASK>

[ 4316.857214] mlx5e_rep_neigh_entry_release+0x93/0x790 [mlx5_core]

[ 4316.858258] mlx5e_rep_encap_entry_detach+0xa7/0xf0 [mlx5_core]

[ 4316.859134] mlx5e_encap_dealloc+0xa3/0xf0 [mlx5_core]

[ 4316.859867] clean_encap_dests.part.0+0x5c/0xe0 [mlx5_core]

[ 4316.860605] mlx5e_tc_del_fdb_flow+0x32a/0x810 [mlx5_core]

[ 4316.862609] __mlx5e_tc_del_fdb_peer_flow+0x1a2/0x250 [mlx5_core]

[ 4316.863394] mlx5e_tc_del_flow+0x(/0x630 [mlx5_core]

[ 4316.864090] mlx5e_flow_put+0x5f/0x100 [mlx5_core]

[ 4316.864771] mlx5e_delete_flower+0x4de/0xa40 [mlx5_core]

[ 4316.865486] tc_setup_cb_reoffload+0x20/0x80

[ 4316.865905] fl_reoffload+0x47c/0x510 [cls_flower]

[ 4316.869181] tcf_block_playback_offloads+0x91/0x1d0

[ 4316.869649] tcf_block_unbind+0xe7/0x1b0

[ 4316.870049] tcf_block_offload_cmd.isra.0+0x1ee/0x270

[ 4316.879266] tcf_block_offload_unbind+0x61/0xa0

[ 4316.879711] __tcf_block_put+0xa4/0x310

Affected software

AZL-69923 is recorded against 1 package.

  • kernel

Timeline and source

Published on 2 May 2025 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-05-02
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — —

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