CVE-2026-64548 (GCVE-0-2026-64548)
Vulnerability from cvelistv5 – Published: 2026-07-27 20:10 – Updated: 2026-07-27 20:10
VLAI
EPSS
VEX
Title
bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
When the scatterlist ring is full or nearly full, bpf_msg_push_data()
enters a copy fallback path and computes copy + len for the page
allocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING
and both are u32, a crafted len can wrap the sum to a small value,
causing an undersized allocation followed by an out-of-bounds memcpy.
BUG: unable to handle page fault for address: ffffed104089a402
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
Call Trace:
__asan_memcpy (mm/kasan/shadow.c:105)
bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788)
bpf_prog_9ed8b5711920a7d7+0x2e/0x36
sk_psock_msg_verdict (net/core/skmsg.c:934)
tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584)
__sys_sendto (net/socket.c:2206)
do_syscall_64 (arch/x86/entry/syscall_64.c:94)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
Add an overflow check before the allocation.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5
(git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < a12b1575f9feabd91695a9e9d004862f7195fa25 (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 888706a76286c547bd035432602571e8024b5305 (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < db77b6bb6e6edb79b10b4efcce346eec5582d588 (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 4e40056bb5c829f0423f0a6694a0477726d2147e (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < bd004716ba75fed6d185795c85cdc92540ebeaab (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 0c0a8ed85349dae298712d79cb276acfeb794d82 (git) |
|
| Linux | Linux |
Affected:
4.20
Unaffected: 0 , < 4.20 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()\n\nWhen the scatterlist ring is full or nearly full, bpf_msg_push_data()\nenters a copy fallback path and computes copy + len for the page\nallocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING\nand both are u32, a crafted len can wrap the sum to a small value,\ncausing an undersized allocation followed by an out-of-bounds memcpy.\n\n BUG: unable to handle page fault for address: ffffed104089a402\n Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n Call Trace:\n __asan_memcpy (mm/kasan/shadow.c:105)\n bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788)\n bpf_prog_9ed8b5711920a7d7+0x2e/0x36\n sk_psock_msg_verdict (net/core/skmsg.c:934)\n tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584)\n __sys_sendto (net/socket.c:2206)\n do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\nAdd an overflow check before the allocation."
}
],
"providerMetadata": {
"dateUpdated": "2026-07-27T20:10:38.355Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/0c0a8ed85349dae298712d79cb276acfeb794d82"
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],
"title": "bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()",
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"assignerShortName": "Linux",
"cveId": "CVE-2026-64548",
"datePublished": "2026-07-27T20:10:38.355Z",
"dateReserved": "2026-07-19T15:36:31.795Z",
"dateUpdated": "2026-07-27T20:10:38.355Z",
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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