CVE-2024-42271— net/iucv: fix use after free in iucv_sock_close()
Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7d316b9453523498246e9e19a659c423d4c5081e< 84f40b46787ecb67c7ad08a5bb1376141fa10c01 | affected |
7d316b9453523498246e9e19a659c423d4c5081e< 37652fbef9809411cea55ea5fa1a170e299efcd0 | affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< c65f72eec60a34ace031426e04e9aff8e5f04895 | affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< ac758e1f663fe9bc64f6b47212a2aa18697524f5 | affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< 8b424c9e44111c5a76f41c6b741f8d4c4179d876 | affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< 01437282fd3904810603f3dc98d2cac6b8b6fc84 | affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< 69620522c48ce8215e5eb55ffbab8cafee8f407d | affected | ||
7d316b9453523498246e9e19a659c423d4c5081e< f558120cd709682b739207b48cf7479fd9568431 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2024-42271
Vulnerability Information
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Vulnerability Title
net/iucv: fix use after free in iucv_sock_close()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix use after free in iucv_sock_close() iucv_sever_path() is called from process context and from bh context. iucv->path is used as indicator whether somebody else is taking care of severing the path (or it is already removed / never existed). This needs to be done with atomic compare and swap, otherwise there is a small window where iucv_sock_close() will try to work with a path that has already been severed and freed by iucv_callback_connrej() called by iucv_tasklet_fn(). Example: [452744.123844] Call Trace: [452744.123845] ([<0000001e87f03880>] 0x1e87f03880) [452744.123966] [<00000000d593001e>] iucv_path_sever+0x96/0x138 [452744.124330] [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv] [452744.124336] [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv] [452744.124341] [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv] [452744.124345] [<00000000d574794e>] __sock_release+0x5e/0xe8 [452744.124815] [<00000000d5747a0c>] sock_close+0x34/0x48 [452744.124820] [<00000000d5421642>] __fput+0xba/0x268 [452744.124826] [<00000000d51b382c>] task_work_run+0xbc/0xf0 [452744.124832] [<00000000d5145710>] do_notify_resume+0x88/0x90 [452744.124841] [<00000000d5978096>] system_call+0xe2/0x2c8 [452744.125319] Last Breaking-Event-Address: [452744.125321] [<00000000d5930018>] iucv_path_sever+0x90/0x138 [452744.125324] [452744.125325] Kernel panic - not syncing: Fatal exception in interrupt Note that bh_lock_sock() is not serializing the tasklet context against process context, because the check for sock_owned_by_user() and corresponding handling is missing. Ideas for a future clean-up patch: A) Correct usage of bh_lock_sock() in tasklet context, as described in Re-enqueue, if needed. This may require adding return values to the tasklet functions and thus changes to all users of iucv. B) Change iucv tasklet into worker and use only lock_sock() in af_iucv.
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，该漏洞源于内存释放后重用。
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-2024-42271
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|---|
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Same Patch Batch · Linux · 2024-08-17 · 109 CVEs total
| CVE-2024-43820 | dm-raid: Fix WARN_ON_ONCE check for sync_thread in raid_resume | |
| CVE-2024-43833 | media: v4l: async: Fix NULL pointer dereference in adding ancillary links | |
| CVE-2024-43831 | media: mediatek: vcodec: Handle invalid decoder vsi | |
| CVE-2024-43832 | s390/uv: Don't call folio_wait_writeback() without a folio reference | |
| CVE-2024-43830 | leds: trigger: Unregister sysfs attributes before calling deactivate() | |
| CVE-2024-43829 | drm/qxl: Add check for drm_cvt_mode | |
| CVE-2024-43828 | ext4: fix infinite loop when replaying fast_commit | |
| CVE-2024-43827 | drm/amd/display: Add null check before access structs | |
| CVE-2024-43826 | nfs: pass explicit offset/count to trace events | |
| CVE-2024-43825 | iio: Fix the sorting functionality in iio_gts_build_avail_time_table | |
| CVE-2024-43823 | PCI: keystone: Fix NULL pointer dereference in case of DT error in ks_pcie_setup_rc_app_re | |
| CVE-2024-43824 | PCI: endpoint: pci-epf-test: Make use of cached 'epc_features' in pci_epf_test_core_init() | |
| CVE-2024-43822 | ASoc: PCM6240: Return directly after a failed devm_kzalloc() in pcmdevice_i2c_probe() | |
| CVE-2024-43821 | scsi: lpfc: Fix a possible null pointer dereference | |
| CVE-2024-42318 | landlock: Don't lose track of restrictions on cred_transfer | |
| CVE-2024-42321 | net: flow_dissector: use DEBUG_NET_WARN_ON_ONCE | |
| CVE-2024-42320 | s390/dasd: fix error checks in dasd_copy_pair_store() | |
| CVE-2024-42319 | mailbox: mtk-cmdq: Move devm_mbox_controller_register() after devm_pm_runtime_enable() | |
| CVE-2024-42322 | ipvs: properly dereference pe in ip_vs_add_service | |
| CVE-2024-42317 | mm/huge_memory: avoid PMD-size page cache if needed |
Showing top 20 of 109 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43492
lib/crypto: mpi: Fix integer underflow in mpi_read_raw_from_ - CVE-2026-43493
crypto: pcrypt - Fix handling of MAY_BACKLOG requests - CVE-2026-43491
net: qrtr: ns: Limit the maximum server registration per nod - CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length
Same vendor: Linux
- CVE-2026-43492
lib/crypto: mpi: Fix integer underflow in mpi_read_raw_from_ - CVE-2026-43493
crypto: pcrypt - Fix handling of MAY_BACKLOG requests - CVE-2026-43491
net: qrtr: ns: Limit the maximum server registration per nod - CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length
V. Comments for CVE-2024-42271
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