Description
In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: validate num_ifs to prevent out-of-bounds write The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes() but never validates it against DPSW_MAX_IF (64). This value controls iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports num_ifs >= 64, the loop can write past the array bounds. Add a bound check for num_ifs in dpaa2_switch_init(). dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all ports match the flood filter, the loop fills all 64 slots and the control interface write overflows by one entry. The check uses >= because num_ifs == DPSW_MAX_IF is also functionally broken. build_if_id_bitmap() silently drops any ID >= 64: if (id[i] < DPSW_MAX_IF) bmap[id[i] / 64] |= ...
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
539dda3c5d190c5088b5e57944b1b482fcb464de to < a26dda3bae469c8e4e1b1993ad33dafa32d0fc28affected539dda3c5d190c5088b5e57944b1b482fcb464de to < a3034a8d56174dd6464c46823438f25797910a8daffected539dda3c5d190c5088b5e57944b1b482fcb464de to < b690635d4719214892855b79ce018d4b1672ac96affected539dda3c5d190c5088b5e57944b1b482fcb464de to < 8b841fd529db9faf8bc678d429d4bf4e98b10900affected539dda3c5d190c5088b5e57944b1b482fcb464de to < 89764cf44544e943230f5e03b8c40a90da26537caffected539dda3c5d190c5088b5e57944b1b482fcb464de to < c18493f750208eb4ff1198fc5a02786b8b2d70a6affected539dda3c5d190c5088b5e57944b1b482fcb464de to < 8a5752c6dcc085a3bfc78589925182e4e98468c5affected
Linux Linux
Default version status: affected
5.13affected0 to < 5.13unaffected5.15.202 to ≤ 5.15.*unaffected6.1.165 to ≤ 6.1.*unaffected6.6.128 to ≤ 6.6.*unaffected6.12.75 to ≤ 6.12.*unaffected6.18.16 to ≤ 6.18.*unaffected6.19.6 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/a26dda3bae469c8e4e1b1993ad33dafa32d0fc28 ↗
- https://git.kernel.org/stable/c/a3034a8d56174dd6464c46823438f25797910a8d ↗
- https://git.kernel.org/stable/c/b690635d4719214892855b79ce018d4b1672ac96 ↗
- https://git.kernel.org/stable/c/8b841fd529db9faf8bc678d429d4bf4e98b10900 ↗
- https://git.kernel.org/stable/c/89764cf44544e943230f5e03b8c40a90da26537c ↗
- https://git.kernel.org/stable/c/c18493f750208eb4ff1198fc5a02786b8b2d70a6 ↗
- https://git.kernel.org/stable/c/8a5752c6dcc085a3bfc78589925182e4e98468c5 ↗