Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stack-out-of-bounds write in devmap get_upper_ifindexes() iterates over all upper devices and writes their indices into an array without checking bounds. Also the callers assume that the max number of upper devices is MAX_NEST_DEV and allocate excluded_devices[1+MAX_NEST_DEV] on the stack, but that assumption is not correct and the number of upper devices could be larger than MAX_NEST_DEV (e.g., many macvlans), causing a stack-out-of-bounds write. Add a max parameter to get_upper_ifindexes() to avoid the issue. When there are too many upper devices, return -EOVERFLOW and abort the redirect. To reproduce, create more than MAX_NEST_DEV(8) macvlans on a device with an XDP program attached using BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS. Then send a packet to the device to trigger the XDP redirect path.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected aeea1b86f9363f3feabb496534d886f082a89f21 before 88df604f0d16a692867582350ce3f2fcd22243f1; affected aeea1b86f9363f3feabb496534d886f082a89f21 before 5000e40acc8d0c36ab709662e32120986ac22e7e; affected aeea1b86f9363f3feabb496534d886f082a89f21 before 8a95fb9df1105b1618872c2846a6c01e3ba20b45; affected aeea1b86f9363f3feabb496534d886f082a89f21 before d2c31d8e03d05edc16656e5ffe187f0d1da763d7; affected aeea1b86f9363f3feabb496534d886f082a89f21 before 75d474702b2ba8b6bcb26eb3004dbc5e95ffd5d2; affected aeea1b86f9363f3feabb496534d886f082a89f21 before ca831567908fd3f73cf97d8a6c09a5054697a182; affected aeea1b86f9363f3feabb496534d886f082a89f21 before b7bf516c3ecd9a2aae2dc2635178ab87b734fef1 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 5.15.203 through 5.15.*; unaffected 6.1.167 through 6.1.*; unaffected 6.6.130 through 6.6.*; unaffected 6.12.77 through 6.12.*; unaffected 6.18.17 through 6.18.*; unaffected 6.19.7 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/88df604f0d16a692867582350ce3f2fcd22243f1
- https://git.kernel.org/stable/c/5000e40acc8d0c36ab709662e32120986ac22e7e
- https://git.kernel.org/stable/c/8a95fb9df1105b1618872c2846a6c01e3ba20b45
- https://git.kernel.org/stable/c/d2c31d8e03d05edc16656e5ffe187f0d1da763d7
- https://git.kernel.org/stable/c/75d474702b2ba8b6bcb26eb3004dbc5e95ffd5d2
- https://git.kernel.org/stable/c/ca831567908fd3f73cf97d8a6c09a5054697a182
- https://git.kernel.org/stable/c/b7bf516c3ecd9a2aae2dc2635178ab87b734fef1
ADP enrichment
No English description supplied.