{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23175", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.983Z", "datePublished": "2026-02-14T16:27:08.104Z", "dateUpdated": "2026-08-05T12:20:28.160Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:20:28.160Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: cpsw: Execute ndo_set_rx_mode callback in a work queue\n\nCommit 1767bb2d47b7 (\"ipv6: mcast: Don't hold RTNL for\nIPV6_ADD_MEMBERSHIP and MCAST_JOIN_GROUP.\") removed the RTNL lock for\nIPV6_ADD_MEMBERSHIP and MCAST_JOIN_GROUP operations. However, this\nchange triggered the following call trace on my BeagleBone Black board:\n WARNING: net/8021q/vlan_core.c:236 at vlan_for_each+0x120/0x124, CPU#0: rpcbind/481\n RTNL: assertion failed at net/8021q/vlan_core.c (236)\n Modules linked in:\n CPU: 0 UID: 997 PID: 481 Comm: rpcbind Not tainted 6.19.0-rc7-next-20260130-yocto-standard+ #35 PREEMPT\n Hardware name: Generic AM33XX (Flattened Device Tree)\n Call trace:\n unwind_backtrace from show_stack+0x28/0x2c\n show_stack from dump_stack_lvl+0x30/0x38\n dump_stack_lvl from __warn+0xb8/0x11c\n __warn from warn_slowpath_fmt+0x130/0x194\n warn_slowpath_fmt from vlan_for_each+0x120/0x124\n vlan_for_each from cpsw_add_mc_addr+0x54/0x98\n cpsw_add_mc_addr from __hw_addr_ref_sync_dev+0xc4/0xec\n __hw_addr_ref_sync_dev from __dev_mc_add+0x78/0x88\n __dev_mc_add from igmp6_group_added+0x84/0xec\n igmp6_group_added from __ipv6_dev_mc_inc+0x1fc/0x2f0\n __ipv6_dev_mc_inc from __ipv6_sock_mc_join+0x124/0x1b4\n __ipv6_sock_mc_join from do_ipv6_setsockopt+0x84c/0x1168\n do_ipv6_setsockopt from ipv6_setsockopt+0x88/0xc8\n ipv6_setsockopt from do_sock_setsockopt+0xe8/0x19c\n do_sock_setsockopt from __sys_setsockopt+0x84/0xac\n __sys_setsockopt from ret_fast_syscall+0x0/0x54\n\nThis trace occurs because vlan_for_each() is called within\ncpsw_ndo_set_rx_mode(), which expects the RTNL lock to be held.\nSince modifying vlan_for_each() to operate without the RTNL lock is not\nstraightforward, and because ndo_set_rx_mode() is invoked both with and\nwithout the RTNL lock across different code paths, simply adding\nrtnl_lock() in cpsw_ndo_set_rx_mode() is not a viable solution.\n\nTo resolve this issue, we opt to execute the actual processing within\na work queue, following the approach used by the icssg-prueth driver.\n\nPlease note: To reproduce this issue, I manually reverted the changes to\nam335x-bone-common.dtsi from commit c477358e66a3 (\"ARM: dts: am335x-bone:\nswitch to new cpsw switch drv\") in order to revert to the legacy cpsw\ndriver." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is triggered via the setsockopt(IPV6_ADD_MEMBERSHIP) syscall, requiring local access to the system with a CPSW Ethernet interface.\nAC:H - While the WARN_ONCE is deterministic, the actual exploitable UAF requires a race between the attacker's multicast join and concurrent VLAN modification (vlan_vid_del), which requires CAP_NET_ADMIN privileges the attacker does not control.\nPR:L - Any unprivileged local user can create an IPv6 socket and call setsockopt with IPV6_ADD_MEMBERSHIP — no capability or privilege checks exist along the call path.\nUI:N - No user interaction is required; the attacker triggers the vulnerability entirely through their own socket operations.\nS:U - The vulnerability stays within the kernel security context; there is no crossing of a security boundary such as VM escape or IOMMU bypass.\nC:H - If the race condition is won, the use-after-free on the vlan_info structure allows reading freed/reallocated memory, potentially exposing arbitrary kernel memory contents.\nI:H - A use-after-free on the vlan_info structure enables heap spraying to control the freed object's contents, providing arbitrary write primitives for control flow hijacking.\nA:H - The use-after-free causes a kernel crash (oops/panic) when accessing freed memory, and even the WARN_ONCE alone causes a panic on systems with panic_on_warn enabled (common in embedded/industrial CPSW deployments)." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/ti/cpsw.c" ], "versions": [ { "version": "1767bb2d47b715a106287a8f963d9ec6cbab4e69", "lessThan": "488009aa62bb1217ea0624fd5108b79adef4e148", "status": "affected", "versionType": "git" }, { "version": "1767bb2d47b715a106287a8f963d9ec6cbab4e69", "lessThan": "0b8c878d117319f2be34c8391a77e0f4d5c94d79", "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/net/ethernet/ti/cpsw.c" ], "versions": [ { "version": "6.17", "status": "affected" }, { "version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.10", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "6.17", "versionEndExcluding": "6.18.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/488009aa62bb1217ea0624fd5108b79adef4e148" }, { "url": "https://git.kernel.org/stable/c/0b8c878d117319f2be34c8391a77e0f4d5c94d79" } ], "title": "net: cpsw: Execute ndo_set_rx_mode callback in a work queue", "x_generator": { "engine": "bippy-1.2.0" } } } }