{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38185","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:23.992Z","datePublished":"2025-07-04T13:37:11.885Z","dateUpdated":"2026-05-11T21:22:53.484Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:22:53.484Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\natm: atmtcp: Free invalid length skb in atmtcp_c_send().\n\nsyzbot reported the splat below. [0]\n\nvcc_sendmsg() copies data passed from userspace to skb and passes\nit to vcc->dev->ops->send().\n\natmtcp_c_send() accesses skb->data as struct atmtcp_hdr after\nchecking if skb->len is 0, but it's not enough.\n\nAlso, when skb->len == 0, skb and sk (vcc) were leaked because\ndev_kfree_skb() is not called and sk_wmem_alloc adjustment is missing\nto revert atm_account_tx() in vcc_sendmsg(), which is expected\nto be done in atm_pop_raw().\n\nLet's properly free skb with an invalid length in atmtcp_c_send().\n\n[0]:\nBUG: KMSAN: uninit-value in atmtcp_c_send+0x255/0xed0 drivers/atm/atmtcp.c:294\n atmtcp_c_send+0x255/0xed0 drivers/atm/atmtcp.c:294\n vcc_sendmsg+0xd7c/0xff0 net/atm/common.c:644\n sock_sendmsg_nosec net/socket.c:712 [inline]\n __sock_sendmsg+0x330/0x3d0 net/socket.c:727\n ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566\n ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620\n __sys_sendmsg net/socket.c:2652 [inline]\n __do_sys_sendmsg net/socket.c:2657 [inline]\n __se_sys_sendmsg net/socket.c:2655 [inline]\n __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655\n x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nUninit was created at:\n slab_post_alloc_hook mm/slub.c:4154 [inline]\n slab_alloc_node mm/slub.c:4197 [inline]\n kmem_cache_alloc_node_noprof+0x818/0xf00 mm/slub.c:4249\n kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:579\n __alloc_skb+0x347/0x7d0 net/core/skbuff.c:670\n alloc_skb include/linux/skbuff.h:1336 [inline]\n vcc_sendmsg+0xb40/0xff0 net/atm/common.c:628\n sock_sendmsg_nosec net/socket.c:712 [inline]\n __sock_sendmsg+0x330/0x3d0 net/socket.c:727\n ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566\n ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620\n __sys_sendmsg net/socket.c:2652 [inline]\n __do_sys_sendmsg net/socket.c:2657 [inline]\n __se_sys_sendmsg net/socket.c:2655 [inline]\n __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655\n x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nCPU: 1 UID: 0 PID: 5798 Comm: syz-executor192 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(undef)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/atm/atmtcp.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c19c0943424b412a84fdf178e6c71fe5480e4f0f","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a4b0fd8c25a7583f8564af6cc910418fb8954e89","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"1b0ad18704913c92a3ad53748fbc0f219a75b876","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"ca00f0e6d733ecd9150716d1fd0138d26e674706","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"3261c017a7c5d2815c6a388c5a3280d1fba0e8db","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e996507f59610e5752b8702537f13f551e7a2c96","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c9260c837de1d2b454960a4a2e44a81272fbcd22","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"2f370ae1fb6317985f3497b1bb80d457508ca2f7","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/atm/atmtcp.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"5.4.295","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.239","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.186","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.142","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.95","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.35","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.15.4","lessThanOrEqual":"6.15.*","status":"unaffected","versionType":"semver"},{"version":"6.16","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.4.295"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.239"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.186"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.1.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.6.95"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.12.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.15.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c19c0943424b412a84fdf178e6c71fe5480e4f0f"},{"url":"https://git.kernel.org/stable/c/a4b0fd8c25a7583f8564af6cc910418fb8954e89"},{"url":"https://git.kernel.org/stable/c/1b0ad18704913c92a3ad53748fbc0f219a75b876"},{"url":"https://git.kernel.org/stable/c/ca00f0e6d733ecd9150716d1fd0138d26e674706"},{"url":"https://git.kernel.org/stable/c/3261c017a7c5d2815c6a388c5a3280d1fba0e8db"},{"url":"https://git.kernel.org/stable/c/e996507f59610e5752b8702537f13f551e7a2c96"},{"url":"https://git.kernel.org/stable/c/c9260c837de1d2b454960a4a2e44a81272fbcd22"},{"url":"https://git.kernel.org/stable/c/2f370ae1fb6317985f3497b1bb80d457508ca2f7"}],"title":"atm: atmtcp: Free invalid length skb in atmtcp_c_send().","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T17:35:11.875Z"}}]}}