CVE-2026-64548bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
- 8.4HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 8 days later
· 8 days later
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 96% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.4.
Affected products
- affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 – < f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5
- affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 – < a12b1575f9feabd91695a9e9d004862f7195fa25
- affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 – < ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d
- affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 – < 888706a76286c547bd035432602571e8024b5305
- affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 – < db77b6bb6e6edb79b10b4efcce346eec5582d588
- affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 – < 4e40056bb5c829f0423f0a6694a0477726d2147e
- affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 – < bd004716ba75fed6d185795c85cdc92540ebeaab
- affected 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 – < 0c0a8ed85349dae298712d79cb276acfeb794d82
- affected 4.20
- unaffected < 4.20
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5 (opens in a new tab)
- https://git.kernel.org/stable/c/a12b1575f9feabd91695a9e9d004862f7195fa25 (opens in a new tab)
- https://git.kernel.org/stable/c/ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d (opens in a new tab)
- https://git.kernel.org/stable/c/888706a76286c547bd035432602571e8024b5305 (opens in a new tab)
- https://git.kernel.org/stable/c/db77b6bb6e6edb79b10b4efcce346eec5582d588 (opens in a new tab)
- https://git.kernel.org/stable/c/4e40056bb5c829f0423f0a6694a0477726d2147e (opens in a new tab)
- https://git.kernel.org/stable/c/bd004716ba75fed6d185795c85cdc92540ebeaab (opens in a new tab)
- https://git.kernel.org/stable/c/0c0a8ed85349dae298712d79cb276acfeb794d82 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-49599 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-64548)Record last updated .