Description
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: fix negative last_changeset_len batadv_piv_tt::last_changeset_len len was declared as s16, but the field is never intended to hold a negative value. When a value greater than 32767 is assigned, it wraps to a negative signed integer. In batadv_send_my_tt_response(), last_changeset_len is temporarily widened to s32. The incorrectly negative s16 value propagates into the s32, causing batadv_tt_prepare_tvlv_local_data() to allocate a full sized buffer but populates only a small portion of it with the collected changeset. All remaining bits are kept uninitialized. Using an u16 avoids this type confusion and ensures that no (negative) sign extension is performed in batadv_send_my_tt_response().
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
a73105b8d4c765d9ebfb664d0a66802127d8e4c7 to < 6314089acf0ddf64376fdc0b1420695504c73f52affecteda73105b8d4c765d9ebfb664d0a66802127d8e4c7 to < 55dc41fe8821e9a849e147255ad572bc933a9d15affecteda73105b8d4c765d9ebfb664d0a66802127d8e4c7 to < c424e8519ac78eac5d9f4eecf06208a0d619ec14affecteda73105b8d4c765d9ebfb664d0a66802127d8e4c7 to < 22d59c72f4a47ffec121d0610f70d0d70c3c11c8affecteda73105b8d4c765d9ebfb664d0a66802127d8e4c7 to < eb235472b52ef36981c5aad330485eaf2382c53baffecteda73105b8d4c765d9ebfb664d0a66802127d8e4c7 to < 179eb62506a02d00370bd6478898cb632e10986caffecteda73105b8d4c765d9ebfb664d0a66802127d8e4c7 to < d29abf70c665730e249d2ec8e1402095ae26bceeaffecteda73105b8d4c765d9ebfb664d0a66802127d8e4c7 to < fc92cdfcb295cefa4344d71a527d61b638b7bfc4affected
Linux Linux
Default version status: affected
3.1affected0 to < 3.1unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.142 to ≤ 6.6.*unaffected6.12.92 to ≤ 6.12.*unaffected6.18.34 to ≤ 6.18.*unaffected7.0.11 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/6314089acf0ddf64376fdc0b1420695504c73f52 ↗
- https://git.kernel.org/stable/c/55dc41fe8821e9a849e147255ad572bc933a9d15 ↗
- https://git.kernel.org/stable/c/c424e8519ac78eac5d9f4eecf06208a0d619ec14 ↗
- https://git.kernel.org/stable/c/22d59c72f4a47ffec121d0610f70d0d70c3c11c8 ↗
- https://git.kernel.org/stable/c/eb235472b52ef36981c5aad330485eaf2382c53b ↗
- https://git.kernel.org/stable/c/179eb62506a02d00370bd6478898cb632e10986c ↗
- https://git.kernel.org/stable/c/d29abf70c665730e249d2ec8e1402095ae26bcee ↗
- https://git.kernel.org/stable/c/fc92cdfcb295cefa4344d71a527d61b638b7bfc4 ↗