Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: s390/qeth: validate user buffer length in SNMP and ARP query ioctls qeth_snmp_command() and qeth_l3_arp_query() allocate a buffer sized by a user-supplied length (udata_len) without checking a lower bound, then set udata_offset to a fixed non-zero value and pass both to a reply callback. The callback bounds-checks the copy with if ((udata_len - udata_offset) < len) Both fields are u32, so a udata_len smaller than udata_offset makes the subtraction wrap and the check pass, and the following memcpy() writes past the allocation. A udata_len of 0 also yields ZERO_SIZE_PTR from kzalloc(), which the existing NULL check does not catch. Reject buffers smaller than udata_offset before allocating, so the callback subtraction can no longer underflow.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4a71df50047f0db65ea09b1be155852e81a45eba before 9d00eeb2d27f4cc817c5e408760226d43f811ec6; affected 4a71df50047f0db65ea09b1be155852e81a45eba before 46443eaddebd84c51940857b11787229be169dec; affected 4a71df50047f0db65ea09b1be155852e81a45eba before 91935843f9396a9e45253e2c0d4337ca1371754b; affected 4a71df50047f0db65ea09b1be155852e81a45eba before cc423f4105fe145b33e1d7cad34245a798358f73; affected 4a71df50047f0db65ea09b1be155852e81a45eba before 3083818e67bcd656965797fbac9a3d6c1d44f78a; affected 4a71df50047f0db65ea09b1be155852e81a45eba before a3083647747942ea32faf14560d6397ff3068046; affected 4a71df50047f0db65ea09b1be155852e81a45eba before 75fb3151513d7d9f77a8f9545418279b119c06b8; affected 4a71df50047f0db65ea09b1be155852e81a45eba before d141f087b1af656f055d7c5793a3e87817ba0bbe |
| Linux / Linux | affected 2.6.26; unaffected 0 before 2.6.26; unaffected 5.10.266 through 5.10.*; unaffected 5.15.217 through 5.15.*; unaffected 6.1.184 through 6.1.*; unaffected 6.6.153 through 6.6.*; unaffected 6.12.105 through 6.12.*; unaffected 6.18.46 through 6.18.*; unaffected 7.1.10 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/9d00eeb2d27f4cc817c5e408760226d43f811ec6
- https://git.kernel.org/stable/c/46443eaddebd84c51940857b11787229be169dec
- https://git.kernel.org/stable/c/91935843f9396a9e45253e2c0d4337ca1371754b
- https://git.kernel.org/stable/c/cc423f4105fe145b33e1d7cad34245a798358f73
- https://git.kernel.org/stable/c/3083818e67bcd656965797fbac9a3d6c1d44f78a
- https://git.kernel.org/stable/c/a3083647747942ea32faf14560d6397ff3068046
- https://git.kernel.org/stable/c/75fb3151513d7d9f77a8f9545418279b119c06b8
- https://git.kernel.org/stable/c/d141f087b1af656f055d7c5793a3e87817ba0bbe
ADP enrichment
No English description supplied.
No references supplied.