Description
In the Linux kernel, the following vulnerability has been resolved: net: appletalk: fix NULL pointer dereference in aarp_send_ddp() aarp_send_ddp() calls atalk_find_dev_addr(dev) in the LocalTalk fast path without checking for NULL. When the device has no AppleTalk interface configured (dev->atalk_ptr == NULL), this leads to a NULL pointer dereference at the at->s_net access. KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:aarp_send_ddp (net/appletalk/aarp.c:552 (discriminator 2)) Call Trace: <TASK> atalk_sendmsg (net/appletalk/ddp.c:1715) __sys_sendto (net/socket.c:2265 (discriminator 1)) __x64_sys_sendto (net/socket.c:2272) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) Add a NULL check consistent with the other callers of atalk_find_dev_addr().
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 < 51cc5e756cec6071ffc620076aebcf5bae936668affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8c4b9ceb1be780588c1c50d573d5ee308e0874d2affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < d643fd42ad96f19b5ce5cb11824fefa617191dbeaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 542c1dd41e1b0cd1c2c3ba8091c7d882eea0d680affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8fc30f0cdf4207a5aa2341c0a98d0f1713b3ce2caffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 83899a056aeb120898a6e3a989971fc63e274e2eaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9e7f36ab5b7bf68463faa5f7b926fea8f35597bbaffected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.271 to ≤ 5.10.*unaffected5.15.222 to ≤ 5.15.*unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/51cc5e756cec6071ffc620076aebcf5bae936668 ↗
- https://git.kernel.org/stable/c/8c4b9ceb1be780588c1c50d573d5ee308e0874d2 ↗
- https://git.kernel.org/stable/c/d643fd42ad96f19b5ce5cb11824fefa617191dbe ↗
- https://git.kernel.org/stable/c/542c1dd41e1b0cd1c2c3ba8091c7d882eea0d680 ↗
- https://git.kernel.org/stable/c/8fc30f0cdf4207a5aa2341c0a98d0f1713b3ce2c ↗
- https://git.kernel.org/stable/c/83899a056aeb120898a6e3a989971fc63e274e2e ↗
- https://git.kernel.org/stable/c/9e7f36ab5b7bf68463faa5f7b926fea8f35597bb ↗