CVE-2025-68787netrom: Fix memory leak in nr_sendmsg()
Updated under an hour ago ()
Does this affect you?
It affects Linux and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: netrom: Fix memory leak in nr_sendmsg() syzbot reported a memory leak [1]. When function sock_alloc_send_skb() return NULL in nr_output(), the original skb is not freed, which was allocated in nr_sendmsg(). Fix this by freeing it before return. [1] BUG: memory leak unreferenced object 0xffff888129f35500 (size 240): comm "syz.0.17", pid 6119, jiffies 4294944652 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 10 52 28 81 88 ff ff ..........R(.... backtrace (crc 1456a3e4): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4983 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340 __alloc_skb+0x203/0x240 net/core/skbuff.c:660 alloc_skb include/linux/skbuff.h:1383 [inline] alloc_skb_with_frags+0x69/0x3f0 net/core/skbuff.c:6671 sock_alloc_send_pskb+0x379/0x3e0 net/core/sock.c:2965 sock_alloc_send_skb include/net/sock.h:1859 [inline] nr_sendmsg+0x287/0x450 net/netrom/af_netrom.c:1105 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] sock_write_iter+0x293/0x2a0 net/socket.c:1195 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x45d/0x710 fs/read_write.c:686 ksys_write+0x143/0x170 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f77e538ac4e3adb1882d5bccb7bfdc111b5963d3; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 09efbf54eeaecebe882af603c9939a4b1bb9567e; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 73839497bbde5cd4fd02bbd9c8bc2640780ae65d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 156a0f6341dce634a825db49ca20b48b1ae9bcc1; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8d1ccba4b171cd504ecfa47349cb9864fc9d687c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 51f5fbc1681bdcffcc7d18bf3dfdb2b1278d3977; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 613d12dd794e078be8ff3cf6b62a6b9acf7f4619 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
References
- https://git.kernel.org/stable/c/f77e538ac4e3adb1882d5bccb7bfdc111b5963d3
- https://git.kernel.org/stable/c/09efbf54eeaecebe882af603c9939a4b1bb9567e
- https://git.kernel.org/stable/c/73839497bbde5cd4fd02bbd9c8bc2640780ae65d
- https://git.kernel.org/stable/c/156a0f6341dce634a825db49ca20b48b1ae9bcc1
- https://git.kernel.org/stable/c/8d1ccba4b171cd504ecfa47349cb9864fc9d687c
- https://git.kernel.org/stable/c/51f5fbc1681bdcffcc7d18bf3dfdb2b1278d3977
- https://git.kernel.org/stable/c/613d12dd794e078be8ff3cf6b62a6b9acf7f4619
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.