{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-21865", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21865", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-03-12T09:42:21.901Z", "updatedAt": "2026-10-15T01:04:57.961Z", "importedAt": "2026-10-24T01:57:29.455Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "gtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: Suppress list corruption splat in gtp_net_exit_batch_rtnl().\n\nBrad Spengler reported the list_del() corruption splat in\ngtp_net_exit_batch_rtnl(). [0]\n\nCommit eb28fd76c0a0 (\"gtp: Destroy device along with udp socket's netns\ndismantle.\") added the for_each_netdev() loop in gtp_net_exit_batch_rtnl()\nto destroy devices in each netns as done in geneve and ip tunnels.\n\nHowever, this could trigger ->dellink() twice for the same device during\n->exit_batch_rtnl().\n\nSay we have two netns A & B and gtp device B that resides in netns B but\nwhose UDP socket is in netns A.\n\n 1. cleanup_net() processes netns A and then B.\n\n 2. gtp_net_exit_batch_rtnl() finds the device B while iterating\n netns A's gn->gtp_dev_list and calls ->dellink().\n\n [ device B is not yet unlinked from netns B\n as unregister_netdevice_many() has not been called. ]\n\n 3. gtp_net_exit_batch_rtnl() finds the device B while iterating\n netns B's for_each_netdev() and calls ->dellink().\n\ngtp_dellink() cleans up the device's hash table, unlinks the dev from\ngn->gtp_dev_list, and calls unregister_netdevice_queue().\n\nBasically, calling gtp_dellink() multiple times is fine unless\nCONFIG_DEBUG_LIST is enabled.\n\nLet's remove for_each_netdev() in gtp_net_exit_batch_rtnl() and\ndelegate the destruction to default_device_exit_batch() as done\nin bareudp.\n\n[0]:\nlist_del corruption, ffff8880aaa62c00->next (autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]) is LIST_POISON1 (ffffffffffffff02) (prev is 0xffffffffffffff04)\nkernel BUG at lib/list_debug.c:58!\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN\nCPU: 1 UID: 0 PID: 1804 Comm: kworker/u8:7 Tainted: G T 6.12.13-grsec-full-20250211091339 #1\nTainted: [T]=RANDSTRUCT\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nWorkqueue: netns cleanup_net\nRIP: 0010:[] __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\nCode: c2 76 91 31 c0 e8 9f b1 f7 fc 0f 0b 4d 89 f0 48 c7 c1 02 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 e0 c2 76 91 31 c0 e8 7f b1 f7 fc <0f> 0b 4d 89 e8 48 c7 c1 04 ff ff ff 48 89 ea 48 89 ee 48 c7 c7 60\nRSP: 0018:fffffe8040b4fbd0 EFLAGS: 00010283\nRAX: 00000000000000cc RBX: dffffc0000000000 RCX: ffffffff818c4054\nRDX: ffffffff84947381 RSI: ffffffff818d1512 RDI: 0000000000000000\nRBP: ffff8880aaa62c00 R08: 0000000000000001 R09: fffffbd008169f32\nR10: fffffe8040b4f997 R11: 0000000000000001 R12: a1988d84f24943e4\nR13: ffffffffffffff02 R14: ffffffffffffff04 R15: ffff8880aaa62c08\nRBX: kasan shadow of 0x0\nRCX: __wake_up_klogd.part.0+0x74/0xe0 kernel/printk/printk.c:4554\nRDX: __list_del_entry_valid_or_report+0x141/0x200 lib/list_debug.c:58\nRSI: vprintk+0x72/0x100 kernel/printk/printk_safe.c:71\nRBP: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc00/0x1000 [slab object]\nRSP: process kstack fffffe8040b4fbd0+0x7bd0/0x8000 [kworker/u8:7+netns 1804 ]\nR09: kasan shadow of process kstack fffffe8040b4f990+0x7990/0x8000 [kworker/u8:7+netns 1804 ]\nR10: process kstack fffffe8040b4f997+0x7997/0x8000 [kworker/u8:7+netns 1804 ]\nR15: autoslab_size_M_dev_P_net_core_dev_11127_8_1328_8_S_4096_A_64_n_139+0xc08/0x1000 [slab object]\nFS: 0000000000000000(0000) GS:ffff888116000000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000748f5372c000 CR3: 0000000015408000 CR4: 00000000003406f0 shadow CR4: 00000000003406f0\nStack:\n 0000000000000000 ffffffff8a0c35e7 ffffffff8a0c3603 ffff8880aaa62c00\n ffff8880aaa62c00 0000000000000004 ffff88811145311c 0000000000000005\n 0000000000000001 ffff8880aaa62000 fffffe8040b4fd40 ffffffff8a0c360d\nCall Trace:\n \n [] __list_del_entry_valid include/linux/list.h:131 [inline] fffffe8040b4fc28\n [] __list_del_entry include/linux/list.h:248 [inline] fffffe8040b4fc28\n [] list_del include/linux/list.h:262 [inl\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "c986380c1d5274c4d5e935addc807d6791cc23eb", "status": "affected", "versionType": "git", "lessThan": "7f86fb07db65a470d0c11f79da551bd9466357dc" }, { "version": "5f1678346109ff3a6d229d33437fcba3cce9209d", "status": "affected", "versionType": "git", "lessThan": "33eb925c0c26e86ca540a08254806512bf911f22" }, { "version": "036f8d814a2cd11ee8ef62b8f3e7ce5dec0ee4f3", "status": "affected", "versionType": "git", "lessThan": "cb15bb1bde0ba97cbbed9508e45210dcafec3657" }, { "version": "efec287cbac92ac6ee8312a89221854760e13b34", "status": "affected", "versionType": "git", "lessThan": "b70fa591b066d52b141fc430ffdee35b6cc87a66" }, { "version": "bb11f992f5a475bc68ef959f17a55306f0328495", "status": "affected", "versionType": "git", "lessThan": "9d03e7e37187ae140e716377599493987fb20c5b" }, { "version": "86f73d4ab2f27deeff22ba9336ad103d94f12ac7", "status": "affected", "versionType": "git", "lessThan": "ff81b14010362f6188ca26fec22ff05e4da45595" }, { "version": "eb28fd76c0a08a47b470677c6cef9dd1c60e92d1", "status": "affected", "versionType": "git", "lessThan": "37e7644b961600ef0beb01d3970c3034a62913af" }, { "version": "eb28fd76c0a08a47b470677c6cef9dd1c60e92d1", "status": "affected", "versionType": "git", "lessThan": "4ccacf86491d33d2486b62d4d44864d7101b299d" }, { "version": "5.4.290", "status": "affected", "versionType": "semver", "lessThan": "5.4.291" }, { "version": "5.10.234", "status": "affected", "versionType": "semver", "lessThan": "5.10.235" }, { "version": "5.15.177", "status": "affected", "versionType": "semver", "lessThan": "5.15.179" }, { "version": "6.1.127", "status": "affected", "versionType": "semver", "lessThan": "6.1.130" }, { "version": "6.6.74", "status": "affected", "versionType": "semver", "lessThan": "6.6.80" }, { "version": "6.12.11", "status": "affected", "versionType": "semver", "lessThan": "6.12.17" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.13", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.13" }, { "version": "5.4.291", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.235", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.179", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.130", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.80", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.17", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.13.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.13.*" }, { "version": "6.14", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }