CVE-2024-35852— mlxsw: spectrum_acl_tcam: Fix memory leak when canceling rehash work
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I. Basic Information for CVE-2024-35852
Vulnerability Information
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Vulnerability Title
mlxsw: spectrum_acl_tcam: Fix memory leak when canceling rehash work
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix memory leak when canceling rehash work The rehash delayed work is rescheduled with a delay if the number of credits at end of the work is not negative as supposedly it means that the migration ended. Otherwise, it is rescheduled immediately. After "mlxsw: spectrum_acl_tcam: Fix possible use-after-free during rehash" the above is no longer accurate as a non-negative number of credits is no longer indicative of the migration being done. It can also happen if the work encountered an error in which case the migration will resume the next time the work is scheduled. The significance of the above is that it is possible for the work to be pending and associated with hints that were allocated when the migration started. This leads to the hints being leaked [1] when the work is canceled while pending as part of ACL region dismantle. Fix by freeing the hints if hints are associated with a work that was canceled while pending. Blame the original commit since the reliance on not having a pending work associated with hints is fragile. [1] unreferenced object 0xffff88810e7c3000 (size 256): comm "kworker/0:16", pid 176, jiffies 4295460353 hex dump (first 32 bytes): 00 30 95 11 81 88 ff ff 61 00 00 00 00 00 00 80 .0......a....... 00 00 61 00 40 00 00 00 00 00 00 00 04 00 00 00 ..a.@........... backtrace (crc 2544ddb9): [<00000000cf8cfab3>] kmalloc_trace+0x23f/0x2a0 [<000000004d9a1ad9>] objagg_hints_get+0x42/0x390 [<000000000b143cf3>] mlxsw_sp_acl_erp_rehash_hints_get+0xca/0x400 [<0000000059bdb60a>] mlxsw_sp_acl_tcam_vregion_rehash_work+0x868/0x1160 [<00000000e81fd734>] process_one_work+0x59c/0xf20 [<00000000ceee9e81>] worker_thread+0x799/0x12c0 [<00000000bda6fe39>] kthread+0x246/0x300 [<0000000070056d23>] ret_from_fork+0x34/0x70 [<00000000dea2b93e>] ret_from_fork_asm+0x1a/0x30
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-35852
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Same Patch Batch · Linux · 2024-05-17 · 135 CVEs total
| CVE-2023-52673 | drm/amd/display: Fix a debugfs null pointer error | |
| CVE-2023-52684 | firmware: qcom: qseecom: fix memory leaks in error paths | |
| CVE-2023-52683 | ACPI: LPIT: Avoid u32 multiplication overflow | |
| CVE-2023-52682 | f2fs: fix to wait on block writeback for post_read case | |
| CVE-2023-52681 | efivarfs: Free s_fs_info on unmount | |
| CVE-2023-52680 | ALSA: scarlett2: Add missing error checks to *_ctl_get() | |
| CVE-2023-52679 | of: Fix double free in of_parse_phandle_with_args_map | |
| CVE-2023-52678 | drm/amdkfd: Confirm list is non-empty before utilizing list_first_entry in kfd_topology.c | |
| CVE-2023-52677 | riscv: Check if the code to patch lies in the exit section | |
| CVE-2023-52676 | bpf: Guard stack limits against 32bit overflow | |
| CVE-2023-52675 | powerpc/imc-pmu: Add a null pointer check in update_events_in_group() | |
| CVE-2023-52674 | ALSA: scarlett2: Add clamp() in scarlett2_mixer_ctl_put() | |
| CVE-2024-35838 | wifi: mac80211: fix potential sta-link leak | |
| CVE-2024-35837 | net: mvpp2: clear BM pool before initialization | |
| CVE-2024-35836 | dpll: fix pin dump crash for rebound module | |
| CVE-2024-35835 | net/mlx5e: fix a double-free in arfs_create_groups | |
| CVE-2024-35834 | xsk: recycle buffer in case Rx queue was full | |
| CVE-2024-35831 | io_uring: Fix release of pinned pages when __io_uaddr_map fails | |
| CVE-2024-35829 | drm/lima: fix a memleak in lima_heap_alloc | |
| CVE-2024-35830 | media: tc358743: register v4l2 async device only after successful setup |
Showing top 20 of 135 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2024-35852
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