CVE-2025-40012
published 2025-10-20CVE-2025-40012: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix warning in smc_rx_splice() when calling get_page() smc_lo_register_dmb()…
PriorityP341high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.18%
7.6th percentile
In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix warning in smc_rx_splice() when calling get_page()
smc_lo_register_dmb() allocates DMB buffers with kzalloc(), which are
later passed to get_page() in smc_rx_splice(). Since kmalloc memory is
not page-backed, this triggers WARN_ON_ONCE() in get_page() and prevents
holding a refcount on the buffer. This can lead to use-after-free if
the memory is released before splice_to_pipe() completes.
Use folio_alloc() instead, ensuring DMBs are page-backed and safe for
get_page().
WARNING: CPU: 18 PID: 12152 at ./include/linux/mm.h:1330 smc_rx_splice+0xaf8/0xe20 [smc]
CPU: 18 UID: 0 PID: 12152 Comm: smcapp Kdump: loaded Not tainted 6.17.0-rc3-11705-g9cf4672ecfee #10 NONE
Hardware name: IBM 3931 A01 704 (z/VM 7.4.0)
Krnl PSW : 0704e00180000000 000793161032696c (smc_rx_splice+0xafc/0xe20 [smc])
R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3
Krnl GPRS: 0000000000000000 001cee80007d3001 00077400000000f8 0000000000000005
0000000000000001 001cee80007d3006 0007740000001000 001c000000000000
000000009b0c99e0 0000000000001000 001c0000000000f8 001c000000000000
000003ffcc6f7c88 0007740003e98000 0007931600000005 000792969b2ff7b8
Krnl Code: 0007931610326960: af000000 mc 0,0
0007931610326964: a7f4ff43 brc 15,00079316103267ea
#0007931610326968: af000000 mc 0,0
>000793161032696c: a7f4ff3f brc 15,00079316103267ea
0007931610326970: e320f1000004 lg %r2,256(%r15)
0007931610326976: c0e53fd1b5f5 brasl %r14,000793168fd5d560
000793161032697c: a7f4fbb5 brc 15,00079316103260e6
0007931610326980: b904002b lgr %r2,%r11
Call Trace:
smc_rx_splice+0xafc/0xe20 [smc]
smc_rx_splice+0x756/0xe20 [smc])
smc_rx_recvmsg+0xa74/0xe00 [smc]
smc_splice_read+0x1ce/0x3b0 [smc]
sock_splice_read+0xa2/0xf0
do_splice_read+0x198/0x240
splice_file_to_pipe+0x7e/0x110
do_splice+0x59e/0xde0
__do_splice+0x11a/0x2d0
__s390x_sys_splice+0x140/0x1f0
__do_syscall+0x122/0x280
system_call+0x6e/0x90
Last Breaking-Event-Address:
smc_rx_splice+0x
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.16.10-1 (forky) | linux 6.16.10-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < 14fc4fdae42e34d7ee871b292ac2ecc61c2c5de7 | 14fc4fdae42e34d7ee871b292ac2ecc61c2c5de7 |
| linux | linux | >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < d5411685dc2f6ac7bdf01a0a204d56cae38c6cf6 | d5411685dc2f6ac7bdf01a0a204d56cae38c6cf6 |
| linux | linux | >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < a35c04de2565db191726b5741e6b66a35002c652 | a35c04de2565db191726b5741e6b66a35002c652 |
| linux | linux_kernel | >= 0 < 6.12.57-1 | 6.12.57-1 |
| linux | linux_kernel | >= 0 < 6.16.10-1 | 6.16.10-1 |
| linux | linux_kernel | >= 6.10.0 < 6.12.50 | 6.12.50 |
| linux | linux_kernel | >= 6.13.0 < 6.16.10 | 6.16.10 |
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Red Hat
kernel: net/smc: fix warning in smc_rx_splice() when calling get_page()
vendor_redhat·2025-10-20
CVE-2025-40012 kernel: net/smc: fix warning in smc_rx_splice() when calling get_page()
kernel: net/smc: fix warning in smc_rx_splice() when calling get_page()
In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix warning in smc_rx_splice() when calling get_page()
smc_lo_register_dmb() allocates DMB buffers with kzalloc(), which are
later passed to get_page() in smc_rx_splice(). Since kmalloc memory is
not page-backed, this triggers WARN_ON_ONCE() in get_page() and prevents
holding a refcount on the buffer. This can lead to use-after-free if
the memory is released before splice_to_pipe() completes.
Use folio_alloc() instead, ensuring DMBs are page-backed and safe for
get_page().
WARNING: CPU: 18 PID: 12152 at ./include/linux/mm.h:1330 smc_rx_splice+0xaf8/0xe20 [smc]
CPU: 18 UID: 0 PID: 12152 Comm: smcapp Kdump: loaded Not tainted 6.17.0-rc3-11705-g
Debian
CVE-2025-40012: linux - In the Linux kernel, the following vulnerability has been resolved: net/smc: fi...
vendor_debian·2025
CVE-2025-40012 [LOW] CVE-2025-40012: linux - In the Linux kernel, the following vulnerability has been resolved: net/smc: fi...
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix warning in smc_rx_splice() when calling get_page() smc_lo_register_dmb() allocates DMB buffers with kzalloc(), which are later passed to get_page() in smc_rx_splice(). Since kmalloc memory is not page-backed, this triggers WARN_ON_ONCE() in get_page() and prevents holding a refcount on the buffer. This can lead to use-after-free if the memory is released before splice_to_pipe() completes. Use folio_alloc() instead, ensuring DMBs are page-backed and safe for get_page(). WARNING: CPU: 18 PID: 12152 at ./include/linux/mm.h:1330 smc_rx_splice+0xaf8/0xe20 [smc] CPU: 18 UID: 0 PID: 12152 Comm: smcapp Kdump: loaded Not tainted 6.17.0-rc3-11705-g9cf4672ecfee #10 NONE Hardware name: IBM 3931 A01 704 (z/VM 7.4.0) Krnl P
OSV
net/smc: fix warning in smc_rx_splice() when calling get_page()
osv·2025-10-20
CVE-2025-40012 net/smc: fix warning in smc_rx_splice() when calling get_page()
net/smc: fix warning in smc_rx_splice() when calling get_page()
In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix warning in smc_rx_splice() when calling get_page()
smc_lo_register_dmb() allocates DMB buffers with kzalloc(), which are
later passed to get_page() in smc_rx_splice(). Since kmalloc memory is
not page-backed, this triggers WARN_ON_ONCE() in get_page() and prevents
holding a refcount on the buffer. This can lead to use-after-free if
the memory is released before splice_to_pipe() completes.
Use folio_alloc() instead, ensuring DMBs are page-backed and safe for
get_page().
WARNING: CPU: 18 PID: 12152 at ./include/linux/mm.h:1330 smc_rx_splice+0xaf8/0xe20 [smc]
CPU: 18 UID: 0 PID: 12152 Comm: smcapp Kdump: loaded Not tainted 6.17.0-rc3-11705-g9cf4
GHSA
GHSA-c4v9-hjfq-qw76: In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix warning in smc_rx_splice() when calling get_page()
smc_lo_register_
ghsa_unreviewed·2025-10-20
CVE-2025-40012 GHSA-c4v9-hjfq-qw76: In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix warning in smc_rx_splice() when calling get_page()
smc_lo_register_
In the Linux kernel, the following vulnerability has been resolved:
net/smc: fix warning in smc_rx_splice() when calling get_page()
smc_lo_register_dmb() allocates DMB buffers with kzalloc(), which are
later passed to get_page() in smc_rx_splice(). Since kmalloc memory is
not page-backed, this triggers WARN_ON_ONCE() in get_page() and prevents
holding a refcount on the buffer. This can lead to use-after-free if
the memory is released before splice_to_pipe() completes.
Use folio_alloc() instead, ensuring DMBs are page-backed and safe for
get_page().
WARNING: CPU: 18 PID: 12152 at ./include/linux/mm.h:1330 smc_rx_splice+0xaf8/0xe20 [smc]
CPU: 18 UID: 0 PID: 12152 Comm: smcapp Kdump: loaded Not tainted 6.17.0-rc3-11705-g9cf4672ecfee #10 NONE
Hardware name: IBM 3931 A01 704 (z/VM 7.4.0)
Kr
OSV
CVE-2025-40012: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix warning in smc_rx_splice() when calling get_page() smc_lo_register_dm
osv·2025-10-20
CVE-2025-40012 CVE-2025-40012: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix warning in smc_rx_splice() when calling get_page() smc_lo_register_dm
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix warning in smc_rx_splice() when calling get_page() smc_lo_register_dmb() allocates DMB buffers with kzalloc(), which are later passed to get_page() in smc_rx_splice(). Since kmalloc memory is not page-backed, this triggers WARN_ON_ONCE() in get_page() and prevents holding a refcount on the buffer. This can lead to use-after-free if the memory is released before splice_to_pipe() completes. Use folio_alloc() instead, ensuring DMBs are page-backed and safe for get_page(). WARNING: CPU: 18 PID: 12152 at ./include/linux/mm.h:1330 smc_rx_splice+0xaf8/0xe20 [smc] CPU: 18 UID: 0 PID: 12152 Comm: smcapp Kdump: loaded Not tainted 6.17.0-rc3-11705-g9cf4672ecfee #10 NONE Hardware name: IBM 3931 A01 704 (z/VM 7.4.0) Krnl P
No detection rules found.
No public exploits indexed.
2025-10-20
Published