CVE-2026-64411
netfilter: ebtables: terminate table name before find_table_lock()
In the Linux kernel, the following vulnerability has been resolved: netfilter: ebtables: terminate table name before find_table_lock() update_counters() and compat_update_counters() forward a user-supplied 32-byte table name to find_table_lock() without NUL-terminating it. On a lookup miss, find_inlist_lock() calls try_then_request_module(..., "%s%s", "ebtable_", name), and vsnprintf() reads past the name field and the stack object until it hits a zero byte. BUG: KASAN: stack-out-of-bounds in string (lib/vsprintf.c:648 lib/vsprintf.c:730) Read of size 1 at addr ffff8880119dfb20 by task exploit/147 Call Trace: ... string (lib/vsprintf.c:648 lib/vsprintf.c:730) vsnprintf (lib/vsprintf.c:2945) __request_module (kernel/module/kmod.c:150) do_update_counters.isra.0 (net/bridge/netfilter/ebtables.c:371 net/bridge/netfilter/ebtables.c:380) update_counters (net/bridge/netfilter/ebtables.c:1440) do_ebt_set_ctl (net/bridge/netfilter/ebtables.c:2573) nf_setsockopt (net/netfilter/nf_sockopt.c:101) ip_setsockopt (net/ipv4/ip_sockglue.c:1424) raw_setsockopt (net/ipv4/raw.c:847) __sys_setsockopt (net/socket.c:2393) ... compat_do_replace() shares the same unterminated name via compat_copy_ebt_replace_from_user(); terminate it there too so all find_table_lock() callers behave alike. The other callers already terminate the name after the copy.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 4c046ca4e35a83ea32f6e748f54139f5fe2a1d01 (affected, git) ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < ab63ccefb9c71627f957a0724c2b9ebc869c6f20 (affected, git) ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < c6f539311e58e76aa96feef0f1572b13a564f8a2 (affected, git) ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 2664f537ca5bcb2ef3fac2683dcca602e51fad24 (affected, git) ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 7436da6c1bc44654b7f11a17e746f6999fd37250 (affected, git) ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 6fe8d3cecd20bfaaaf440db3a06ba674d2f2e322 (affected, git) ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < b6183b1b88a722b6d8ea0cecc99eba168a15e0be (affected, git) ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < a622d2e9608c9dff47fc2e5759ac7aa3a836b45d (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
2.6.12 (affected) ≥ 0; < 2.6.12 (unaffected, semver) ≥ 5.10.261; ≤ 5.10.* (unaffected, semver) ≥ 5.15.212; ≤ 5.15.* (unaffected, semver) ≥ 6.1.178; ≤ 6.1.* (unaffected, semver) ≥ 6.6.145; ≤ 6.6.* (unaffected, semver) ≥ 6.12.96; ≤ 6.12.* (unaffected, semver) ≥ 6.18.39; ≤ 6.18.* (unaffected, semver) ≥ 7.1.4; ≤ 7.1.* (unaffected, semver) ≥ 7.2; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.1 high |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H | CNA: Linux |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/4c046ca4e35a83ea32f6e748f54139f5fe2a1d01CNA: Linux
- https://git.kernel.org/stable/c/ab63ccefb9c71627f957a0724c2b9ebc869c6f20CNA: Linux
- https://git.kernel.org/stable/c/c6f539311e58e76aa96feef0f1572b13a564f8a2CNA: Linux
- https://git.kernel.org/stable/c/2664f537ca5bcb2ef3fac2683dcca602e51fad24CNA: Linux
- https://git.kernel.org/stable/c/7436da6c1bc44654b7f11a17e746f6999fd37250CNA: Linux
- https://git.kernel.org/stable/c/6fe8d3cecd20bfaaaf440db3a06ba674d2f2e322CNA: Linux
- https://git.kernel.org/stable/c/b6183b1b88a722b6d8ea0cecc99eba168a15e0beCNA: Linux
- https://git.kernel.org/stable/c/a622d2e9608c9dff47fc2e5759ac7aa3a836b45dCNA: Linux
- https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlADP: siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlADP: siemens-SADP
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