In the Linux kernel, the following vulnerability has been resolved:

net: bridge: mrp: fix uninitialised bytes on the wire

br_mrp_alloc_test_skb() builds MRP test frames on an skb from
dev_alloc_skb(), which does not clear the linear data area.  On the MRA
ring-role branch the sub-option TLV header is appended with

	sub_tlv = skb_put(skb, sizeof(*sub_tlv));
	sub_tlv->type = BR_MRP_SUB_TLV_HEADER_TEST_AUTO_MGR;

so sub_tlv->length is never written, and the two trailing alignment bytes
are appended with a bare skb_put() that does not clear them either.  The
neighbouring oui and sub_opt regions are explicitly zeroed, so three
uninitialised bytes are left in every MRA MRP_Test frame that goes out.

Put the sub-option TLV header and the alignment padding in a single
skb_put_zero(), which clears both.  The AUTO_MGR sub-TLV carries no
payload, so the zeroed length field is already the value it should have.

https://git.kernel.org/stable/c/014c062d23c63ec77ef2cf17a0d9363c7441cc94

https://git.kernel.org/stable/c/06d58b8d2f053ced82e01efaeb6e7c82891eed58

https://git.kernel.org/stable/c/5912cf1822fbe53ae275c147868740eb384a5d3e

https://git.kernel.org/stable/c/63488dba65ef91373ef616575b32eb0eb21459f4

https://git.kernel.org/stable/c/7ebc23ff03668042e0b0e4034bb1518d36198d9e

https://git.kernel.org/stable/c/a5e385eeb2d6dbbbdebfa050e67c34734ae12693

https://git.kernel.org/stable/c/e08665218040f8e312abe40f74543186f3c2c941

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["net/bridge/br_mrp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f7458934b0791c39a001e4d902fc3bf697b439b5","lessThan":"014c062d23c63ec77ef2cf17a0d9363c7441cc94","versionType":"git","status":"affected"},{"version":"f7458934b0791c39a001e4d902fc3bf697b439b5","lessThan":"7ebc23ff03668042e0b0e4034bb1518d36198d9e","versionType":"git","status":"affected"},{"version":"f7458934b0791c39a001e4d902fc3bf697b439b5","lessThan":"06d58b8d2f053ced82e01efaeb6e7c82891eed58","versionType":"git","status":"affected"},{"version":"f7458934b0791c39a001e4d902fc3bf697b439b5","lessThan":"a5e385eeb2d6dbbbdebfa050e67c34734ae12693","versionType":"git","status":"affected"},{"version":"f7458934b0791c39a001e4d902fc3bf697b439b5","lessThan":"5912cf1822fbe53ae275c147868740eb384a5d3e","versionType":"git","status":"affected"},{"version":"f7458934b0791c39a001e4d902fc3bf697b439b5","lessThan":"e08665218040f8e312abe40f74543186f3c2c941","versionType":"git","status":"affected"},{"version":"f7458934b0791c39a001e4d902fc3bf697b439b5","lessThan":"63488dba65ef91373ef616575b32eb0eb21459f4","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["net/bridge/br_mrp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.14","status":"affected"},{"version":"0","lessThan":"5.14","versionType":"semver","status":"unaffected"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.152","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.104","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.45","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.9","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]