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🛡️ CVE-2024-49953 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

net/mlx5e: Fix crash caused by calling __xfrm_state_delete() twice

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

net/mlx5e: Fix crash caused by calling __xfrm_state_delete() twice

The km.state is not checked in driver's delayed work. When

xfrm_state_check_expire() is called, the state can be reset to

XFRM_STATE_EXPIRED, even if it is XFRM_STATE_DEAD already. This

happens when xfrm state is deleted, but not freed yet. As

__xfrm_state_delete() is called again in xfrm timer, the following

crash occurs.

To fix this issue, skip xfrm_state_check_expire() if km.state is not

XFRM_STATE_VALID.

Oops: general protection fault, probably for non-canonical address 0xdead000000000108: 0000 [#1] SMP

CPU: 5 UID: 0 PID: 7448 Comm: kworker/u102:2 Not tainted 6.11.0-rc2+ #1

Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014

Workqueue: mlx5e_ipsec: eth%d mlx5e_ipsec_handle_sw_limits [mlx5_core]

RIP: 0010:__xfrm_state_delete+0x3d/0x1b0

Code: 0f 84 8b 01 00 00 48 89 fd c6 87 c8 00 00 00 05 48 8d bb 40 10 00 00 e8 11 04 1a 00 48 8b 95 b8 00 00 00 48 8b 85 c0 00 00 00 <48> 89 42 08 48 89 10 48 8b 55 10 48 b8 00 01 00 00 00 00 ad de 48

RSP: 0018:ffff88885f945ec8 EFLAGS: 00010246

RAX: dead000000000122 RBX: ffffffff82afa940 RCX: 0000000000000036

RDX: dead000000000100 RSI: 0000000000000000 RDI: ffffffff82afb980

RBP: ffff888109a20340 R08: ffff88885f945ea0 R09: 0000000000000000

R10: 0000000000000000 R11: ffff88885f945ff8 R12: 0000000000000246

R13: ffff888109a20340 R14: ffff88885f95f420 R15: ffff88885f95f400

FS: 0000000000000000(0000) GS:ffff88885f940000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007f2163102430 CR3: 00000001128d6001 CR4: 0000000000370eb0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Call Trace:

<IRQ>

? die_addr+0x33/0x90

? exc_general_protection+0x1a2/0x390

? asm_exc_general_protection+0x22/0x30

? __xfrm_state_delete+0x3d/0x1b0

? __xfrm_state_delete+0x2f/0x1b0

xfrm_timer_handler+0x174/0x350

? __xfrm_state_delete+0x1b0/0x1b0

__hrtimer_run_queues+0x121/0x270

hrtimer_run_softirq+0x88/0xd0

handle_softirqs+0xcc/0x270

do_softirq+0x3c/0x50

</IRQ>

<TASK>

__local_bh_enable_ip+0x47/0x50

mlx5e_ipsec_handle_sw_limits+0x7d/0x90 [mlx5_core]

process_one_work+0x137/0x2d0

worker_thread+0x28d/0x3a0

? rescuer_thread+0x480/0x480

kthread+0xb8/0xe0

? kthread_park+0x80/0x80

ret_from_fork+0x2d/0x50

? kthread_park+0x80/0x80

ret_from_fork_asm+0x11/0x20

</TASK>

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-49953 is recorded against 2 packages.

  • kernel (from 6.11.0 up to 6.11.3)
  • linux-kernel

Timeline and source

Published on 21 October 2024 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2024-49953 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-10-21
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.11.0 6.11.3
linux-kernel — —

Similar Threats

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