Description
In the Linux kernel, the following vulnerability has been resolved: net: ipv6: fix field-spanning memcpy warning in AH output Fix field-spanning memcpy warnings in ah6_output() and ah6_output_done() where extension headers are copied to/from IPv6 address fields, triggering fortify-string warnings about writes beyond the 16-byte address fields. memcpy: detected field-spanning write (size 40) of single field "&top_iph->saddr" at net/ipv6/ah6.c:439 (size 16) WARNING: CPU: 0 PID: 8838 at net/ipv6/ah6.c:439 ah6_output+0xe7e/0x14e0 net/ipv6/ah6.c:439 The warnings are false positives as the extension headers are intentionally placed after the IPv6 header in memory. Fix by properly copying addresses and extension headers separately, and introduce helper functions to avoid code duplication.
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
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 2da805a61ef5272a2773775ce14c3650adb84248affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9bf27de51bd6db5ff827780ec0eba55de230ba45affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 0bf756ae1e69fec5e6332c37830488315d6d771baffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 75b16b2755e12999ad850756ddfb88ad4bfc7186affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < f28dde240160f3c48a50d641d210ed6a3b9596edaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < c14cf41094136691c92ef756872570645d61f4a1affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < b056f971bd72b373b7ae2025a8f3bd18f69653d3affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 2327a3d6f65ce2fe2634546dde4a25ef52296fecaffected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.4.302 to ≤ 5.4.*unaffected5.10.247 to ≤ 5.10.*unaffected5.15.197 to ≤ 5.15.*unaffected6.1.159 to ≤ 6.1.*unaffected6.6.117 to ≤ 6.6.*unaffected6.12.58 to ≤ 6.12.*unaffected6.17.8 to ≤ 6.17.*unaffected6.18 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/2da805a61ef5272a2773775ce14c3650adb84248 ↗
- https://git.kernel.org/stable/c/9bf27de51bd6db5ff827780ec0eba55de230ba45 ↗
- https://git.kernel.org/stable/c/0bf756ae1e69fec5e6332c37830488315d6d771b ↗
- https://git.kernel.org/stable/c/75b16b2755e12999ad850756ddfb88ad4bfc7186 ↗
- https://git.kernel.org/stable/c/f28dde240160f3c48a50d641d210ed6a3b9596ed ↗
- https://git.kernel.org/stable/c/c14cf41094136691c92ef756872570645d61f4a1 ↗
- https://git.kernel.org/stable/c/b056f971bd72b373b7ae2025a8f3bd18f69653d3 ↗
- https://git.kernel.org/stable/c/2327a3d6f65ce2fe2634546dde4a25ef52296fec ↗