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CVE-2025-40253— s390/ctcm: Fix double-kfree

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于双重释放mpcginfo对象，可能导致内存损坏。

CVSS 8.8 · High EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1564.008 · Email Hiding Rules

Affected Version Matrix 29

VendorProduct Version RangeStatus
Linux Linux 467ddbbe7e749d558f13e640f50f546149c930b3< 06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2 affected
4d3c6d741816539b57fa1110c3f765a8c176d7b4< 6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a affected
2bd57101c3ecf3f8c0da1d26c2b6ad511adc6d50< 7616e2eee679746d526c7f5befd4eedb995935b5 affected
0c0b20587b9f25a2ad14db7f80ebe49bdf29920a< 43096dab8cc60fc39133205fd149a54d3acebea8 affected
0c0b20587b9f25a2ad14db7f80ebe49bdf29920a< 3b177b2ded563df16f6d5920671ffcfe5915d472 affected
0c0b20587b9f25a2ad14db7f80ebe49bdf29920a< b9dbfb1b5699f9f1e4991f96741bdf9047147589 affected
0c0b20587b9f25a2ad14db7f80ebe49bdf29920a< 7ff76f8dc6b550f8d16487bf3cebc278be720b5c affected
0c0b20587b9f25a2ad14db7f80ebe49bdf29920a< da02a1824884d6c84c5e5b5ac373b0c9e3288ec2 affected
… +21 more rows
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I. Basic Information for CVE-2025-40253

Vulnerability Information
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Vulnerability Title
s390/ctcm: Fix double-kfree
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/ctcm: Fix double-kfree The function 'mpc_rcvd_sweep_req(mpcginfo)' is called conditionally from function 'ctcmpc_unpack_skb'. It frees passed mpcginfo. After that a call to function 'kfree' in function 'ctcmpc_unpack_skb' frees it again. Remove 'kfree' call in function 'mpc_rcvd_sweep_req(mpcginfo)'. Bug detected by the clang static analyzer.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于双重释放mpcginfo对象，可能导致内存损坏。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 467ddbbe7e749d558f13e640f50f546149c930b3 ~ 06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2 -
Linux Linux 5.18 -

II. Public POCs for CVE-2025-40253

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III. Intelligence Information for CVE-2025-40253

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Same Patch Batch · Linux · 2025-12-04 · 53 CVEs total

CVE-2025-40261 9.8 CRITICAL nvme: nvme-fc: Ensure ->ioerr_work is cancelled in nvme_fc_delete_ctrl()
CVE-2025-40252 9.8 CRITICAL net: qlogic/qede: fix potential out-of-bounds read in qede_tpa_cont() and qede_tpa_end()
CVE-2025-40258 9.8 CRITICAL mptcp: fix race condition in mptcp_schedule_work()
CVE-2025-40257 9.8 CRITICAL mptcp: fix a race in mptcp_pm_del_add_timer()
CVE-2025-40266 8.2 HIGH KVM: arm64: Check the untrusted offset in FF-A memory share
CVE-2025-40244 7.8 HIGH hfsplus: fix KMSAN uninit-value issue in __hfsplus_ext_cache_extent()
CVE-2025-40262 7.8 HIGH Input: imx_sc_key - fix memory corruption on unload
CVE-2025-40250 7.8 HIGH net/mlx5: Clean up only new IRQ glue on request_irq() failure
CVE-2025-40251 7.8 HIGH devlink: rate: Unset parent pointer in devl_rate_nodes_destroy
CVE-2025-40248 7.8 HIGH vsock: Ignore signal/timeout on connect() if already established
CVE-2025-40249 7.8 HIGH gpio: cdev: make sure the cdev fd is still active before emitting events
CVE-2025-40245 7.8 HIGH nios2: ensure that memblock.current_limit is set when setting pfn limits
CVE-2025-40214 7.8 HIGH af_unix: Initialise scc_index in unix_add_edge().
CVE-2025-40243 7.8 HIGH hfs: fix KMSAN uninit-value issue in hfs_find_set_zero_bits()
CVE-2025-40241 7.8 HIGH erofs: fix crafted invalid cases for encoded extents
CVE-2025-40233 7.8 HIGH ocfs2: clear extent cache after moving/defragmenting extents
CVE-2025-40216 7.8 HIGH io_uring/rsrc: don't rely on user vaddr alignment
CVE-2025-40215 7.8 HIGH xfrm: delete x->tunnel as we delete x
CVE-2025-40240 7.5 HIGH sctp: avoid NULL dereference when chunk data buffer is missing
CVE-2025-40242 7.0 HIGH gfs2: Fix unlikely race in gdlm_put_lock

Showing top 20 of 53 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40253

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