Description
In the Linux kernel, the following vulnerability has been resolved: w1: therm: Fix off-by-one buffer overflow in alarms_store The sysfs buffer passed to alarms_store() is allocated with 'size + 1' bytes and a NUL terminator is appended. However, the 'size' argument does not account for this extra byte. The original code then allocated 'size' bytes and used strcpy() to copy 'buf', which always writes one byte past the allocated buffer since strcpy() copies until the NUL terminator at index 'size'. Fix this by parsing the 'buf' parameter directly using simple_strtoll() without allocating any intermediate memory or string copying. This removes the overflow while simplifying the code.
Product status
e2c94d6f572079511945e64537eb1218643f2e68 (git) before 49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95
e2c94d6f572079511945e64537eb1218643f2e68 (git) before 060b08d72a38b158a7f850d4b83c17c2969e0f6b
e2c94d6f572079511945e64537eb1218643f2e68 (git) before b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf
e2c94d6f572079511945e64537eb1218643f2e68 (git) before 6a5820ecfa5a76c3d3e154802c8c15f391ef442e
e2c94d6f572079511945e64537eb1218643f2e68 (git) before 6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0
e2c94d6f572079511945e64537eb1218643f2e68 (git) before e6b2609af21b5cccc9559339591b8a2cbf884169
e2c94d6f572079511945e64537eb1218643f2e68 (git) before 761fcf46a1bd797bd32d23f3ea0141ffd437668a
5.8
Any version before 5.8
5.10.249 (semver)
5.15.199 (semver)
6.1.162 (semver)
6.6.122 (semver)
6.12.68 (semver)
6.18.8 (semver)
6.19 (original_commit_for_fix)
References
git.kernel.org/...c/49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95
git.kernel.org/...c/060b08d72a38b158a7f850d4b83c17c2969e0f6b
git.kernel.org/...c/b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf
git.kernel.org/...c/6a5820ecfa5a76c3d3e154802c8c15f391ef442e
git.kernel.org/...c/6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0
git.kernel.org/...c/e6b2609af21b5cccc9559339591b8a2cbf884169
git.kernel.org/...c/761fcf46a1bd797bd32d23f3ea0141ffd437668a