{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-71093",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-01-13T15:30:19.650Z",
"datePublished": "2026-01-13T15:34:53.803Z",
"dateUpdated": "2026-08-05T12:12:02.005Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:12:02.005Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ne1000: fix OOB in e1000_tbi_should_accept()\n\nIn e1000_tbi_should_accept() we read the last byte of the frame via\n'data[length - 1]' to evaluate the TBI workaround. If the descriptor-\nreported length is zero or larger than the actual RX buffer size, this\nread goes out of bounds and can hit unrelated slab objects. The issue\nis observed from the NAPI receive path (e1000_clean_rx_irq):\n\n==================================================================\nBUG: KASAN: slab-out-of-bounds in e1000_tbi_should_accept+0x610/0x790\nRead of size 1 at addr ffff888014114e54 by task sshd/363\n\nCPU: 0 PID: 363 Comm: sshd Not tainted 5.18.0-rc1 #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014\nCall Trace:\n \n dump_stack_lvl+0x5a/0x74\n print_address_description+0x7b/0x440\n print_report+0x101/0x200\n kasan_report+0xc1/0xf0\n e1000_tbi_should_accept+0x610/0x790\n e1000_clean_rx_irq+0xa8c/0x1110\n e1000_clean+0xde2/0x3c10\n __napi_poll+0x98/0x380\n net_rx_action+0x491/0xa20\n __do_softirq+0x2c9/0x61d\n do_softirq+0xd1/0x120\n \n \n __local_bh_enable_ip+0xfe/0x130\n ip_finish_output2+0x7d5/0xb00\n __ip_queue_xmit+0xe24/0x1ab0\n __tcp_transmit_skb+0x1bcb/0x3340\n tcp_write_xmit+0x175d/0x6bd0\n __tcp_push_pending_frames+0x7b/0x280\n tcp_sendmsg_locked+0x2e4f/0x32d0\n tcp_sendmsg+0x24/0x40\n sock_write_iter+0x322/0x430\n vfs_write+0x56c/0xa60\n ksys_write+0xd1/0x190\n do_syscall_64+0x43/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7f511b476b10\nCode: 73 01 c3 48 8b 0d 88 d3 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d f9 2b 2c 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 8e 9b 01 00 48 89 04 24\nRSP: 002b:00007ffc9211d4e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 0000000000004024 RCX: 00007f511b476b10\nRDX: 0000000000004024 RSI: 0000559a9385962c RDI: 0000000000000003\nRBP: 0000559a9383a400 R08: fffffffffffffff0 R09: 0000000000004f00\nR10: 0000000000000070 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007ffc9211d57f R14: 0000559a9347bde7 R15: 0000000000000003\n \nAllocated by task 1:\n __kasan_krealloc+0x131/0x1c0\n krealloc+0x90/0xc0\n add_sysfs_param+0xcb/0x8a0\n kernel_add_sysfs_param+0x81/0xd4\n param_sysfs_builtin+0x138/0x1a6\n param_sysfs_init+0x57/0x5b\n do_one_initcall+0x104/0x250\n do_initcall_level+0x102/0x132\n do_initcalls+0x46/0x74\n kernel_init_freeable+0x28f/0x393\n kernel_init+0x14/0x1a0\n ret_from_fork+0x22/0x30\nThe buggy address belongs to the object at ffff888014114000\n which belongs to the cache kmalloc-2k of size 2048\nThe buggy address is located 1620 bytes to the right of\n 2048-byte region [ffff888014114000, ffff888014114800]\nThe buggy address belongs to the physical page:\npage:ffffea0000504400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14110\nhead:ffffea0000504400 order:3 compound_mapcount:0 compound_pincount:0\nflags: 0x100000000010200(slab|head|node=0|zone=1)\nraw: 0100000000010200 0000000000000000 dead000000000001 ffff888013442000\nraw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n==================================================================\n\nThis happens because the TBI check unconditionally dereferences the last\nbyte without validating the reported length first:\n\n\tu8 last_byte = *(data + length - 1);\n\nFix by rejecting the frame early if the length is zero, or if it exceeds\nadapter->rx_buffer_len. This preserves the TBI workaround semantics for\nvalid frames and prevents touching memory beyond the RX buffer."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"baseScore": 9.1,
"baseSeverity": "CRITICAL"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The flaw is reached while processing attacker-controlled inbound traffic in the e1000 NAPI receive path, before any authenticated protocol. In a reasonable jumbo-capable routed deployment, an oversized packet can produce a descriptor length beyond the driver's RX-buffer bound without same-host access.\nAC:L - No race or victim-dependent state is required: TBI compatibility or RXALL permits errored or oversized frames to reach the unchecked descriptor-length read. An attacker can choose packet sizes and repeatedly trigger the path.\nPR:N - Receive processing occurs in interrupt/softirq context before socket ownership, authentication, or capability checks, so an unauthenticated sender needs no privileges.\nUI:N - The vulnerable receive path runs automatically when the NIC processes an incoming frame and requires no victim action.\nS:U - The vulnerable driver and the affected kernel resources belong to the same host security authority; this does not inherently cross a VM, IOMMU, or other security boundary.\nC:H - The unchecked 16-bit length can select memory well outside the RX fragment, and the observed access reached an unrelated slab object. Repeated chosen lengths, TBI's data-dependent acceptance, and possible delivery of an overlong skb provide a defensible kernel-memory disclosure scenario.\nI:N - The vulnerable operation is a read, and the examined path establishes no attacker-controlled write or control-flow overwrite attributable to this flaw.\nA:H - The out-of-bounds access can cross allocation or page boundaries and cause a KASAN failure, kernel fault, oops, or panic. Network traffic can repeatedly retrigger the receive path."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/ethernet/intel/e1000/e1000_main.c"
],
"versions": [
{
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"status": "affected",
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},
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{
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"status": "affected",
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},
{
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"status": "affected",
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}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/ethernet/intel/e1000/e1000_main.c"
],
"versions": [
{
"version": "3.18",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.18",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.248",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.198",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.160",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.120",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.64",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.4",
"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": "3.18",
"versionEndExcluding": "5.10.248"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
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"references": [
{
"url": "https://git.kernel.org/stable/c/4ccfa56f272241e8d8e2c38191fdbb03df489d80"
},
{
"url": "https://git.kernel.org/stable/c/278b7cfe0d4da7502c7fd679b15032f014c92892"
},
{
"url": "https://git.kernel.org/stable/c/ad7a2a45e2417ac54089926b520924f8f0d91aea"
},
{
"url": "https://git.kernel.org/stable/c/2c4c0c09f9648ba766d399917d420d03e7b3e1f8"
},
{
"url": "https://git.kernel.org/stable/c/26c8bebc2f25288c2bcac7bc0a7662279a0e817c"
},
{
"url": "https://git.kernel.org/stable/c/ee7c125fb3e8b04dd46510130b9fc92380e5d578"
},
{
"url": "https://git.kernel.org/stable/c/9c72a5182ed92904d01057f208c390a303f00a0f"
}
],
"title": "e1000: fix OOB in e1000_tbi_should_accept()",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2025-71093",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-06-10T20:42:11.366490Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-06-11T18:44:20.337Z"
}
}
]
}
}