{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-21868",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-12-29T08:45:45.781Z",
"datePublished": "2025-03-27T13:38:21.586Z",
"dateUpdated": "2026-05-11T21:08:04.765Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T21:08:04.765Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: allow small head cache usage with large MAX_SKB_FRAGS values\n\nSabrina reported the following splat:\n\n WARNING: CPU: 0 PID: 1 at net/core/dev.c:6935 netif_napi_add_weight_locked+0x8f2/0xba0\n Modules linked in:\n CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.14.0-rc1-net-00092-g011b03359038 #996\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014\n RIP: 0010:netif_napi_add_weight_locked+0x8f2/0xba0\n Code: e8 c3 e6 6a fe 48 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc c7 44 24 10 ff ff ff ff e9 8f fb ff ff e8 9e e6 6a fe <0f> 0b e9 d3 fe ff ff e8 92 e6 6a fe 48 8b 04 24 be ff ff ff ff 48\n RSP: 0000:ffffc9000001fc60 EFLAGS: 00010293\n RAX: 0000000000000000 RBX: ffff88806ce48128 RCX: 1ffff11001664b9e\n RDX: ffff888008f00040 RSI: ffffffff8317ca42 RDI: ffff88800b325cb6\n RBP: ffff88800b325c40 R08: 0000000000000001 R09: ffffed100167502c\n R10: ffff88800b3a8163 R11: 0000000000000000 R12: ffff88800ac1c168\n R13: ffff88800ac1c168 R14: ffff88800ac1c168 R15: 0000000000000007\n FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: ffff888008201000 CR3: 0000000004c94001 CR4: 0000000000370ef0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n \n gro_cells_init+0x1ba/0x270\n xfrm_input_init+0x4b/0x2a0\n xfrm_init+0x38/0x50\n ip_rt_init+0x2d7/0x350\n ip_init+0xf/0x20\n inet_init+0x406/0x590\n do_one_initcall+0x9d/0x2e0\n do_initcalls+0x23b/0x280\n kernel_init_freeable+0x445/0x490\n kernel_init+0x20/0x1d0\n ret_from_fork+0x46/0x80\n ret_from_fork_asm+0x1a/0x30\n \n irq event stamp: 584330\n hardirqs last enabled at (584338): [] __up_console_sem+0x77/0xb0\n hardirqs last disabled at (584345): [] __up_console_sem+0x5c/0xb0\n softirqs last enabled at (583242): [] netlink_insert+0x14d/0x470\n softirqs last disabled at (583754): [] netif_napi_add_weight_locked+0x77d/0xba0\n\non kernel built with MAX_SKB_FRAGS=45, where SKB_WITH_OVERHEAD(1024)\nis smaller than GRO_MAX_HEAD.\n\nSuch built additionally contains the revert of the single page frag cache\nso that napi_get_frags() ends up using the page frag allocator, triggering\nthe splat.\n\nNote that the underlying issue is independent from the mentioned\nrevert; address it ensuring that the small head cache will fit either TCP\nand GRO allocation and updating napi_alloc_skb() and __netdev_alloc_skb()\nto select kmalloc() usage for any allocation fitting such cache."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"include/net/gro.h",
"net/core/gro.c",
"net/core/skbuff.c"
],
"versions": [
{
"version": "3948b05950fdd64002a5f182c65ba5cf2d53cf71",
"lessThan": "ed8a77fee4618facd2a539cad7b7366697b5a575",
"status": "affected",
"versionType": "git"
},
{
"version": "3948b05950fdd64002a5f182c65ba5cf2d53cf71",
"lessThan": "ed0ca7d2127c63991cfaf1932b827e3f4f8ee480",
"status": "affected",
"versionType": "git"
},
{
"version": "3948b05950fdd64002a5f182c65ba5cf2d53cf71",
"lessThan": "648e440c98e260dec835e48a5d7a9993477b1f9d",
"status": "affected",
"versionType": "git"
},
{
"version": "3948b05950fdd64002a5f182c65ba5cf2d53cf71",
"lessThan": "14ad6ed30a10afbe91b0749d6378285f4225d482",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"include/net/gro.h",
"net/core/gro.c",
"net/core/skbuff.c"
],
"versions": [
{
"version": "6.4",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.4",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.117",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.17",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.13.5",
"lessThanOrEqual": "6.13.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.14",
"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": "6.4",
"versionEndExcluding": "6.6.117"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.4",
"versionEndExcluding": "6.12.17"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.4",
"versionEndExcluding": "6.13.5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.4",
"versionEndExcluding": "6.14"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/ed8a77fee4618facd2a539cad7b7366697b5a575"
},
{
"url": "https://git.kernel.org/stable/c/ed0ca7d2127c63991cfaf1932b827e3f4f8ee480"
},
{
"url": "https://git.kernel.org/stable/c/648e440c98e260dec835e48a5d7a9993477b1f9d"
},
{
"url": "https://git.kernel.org/stable/c/14ad6ed30a10afbe91b0749d6378285f4225d482"
}
],
"title": "net: allow small head cache usage with large MAX_SKB_FRAGS values",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}