Description
In the Linux kernel, the following vulnerability has been resolved: net: skbuff: don't leave stale bytes in skb_copy_and_csum_bits() When skb_copy_and_csum_bits() reaches unreadable frags it returns 0 after copying only the linear part, and the rest of the caller's buffer is left as it was. The callers copy into a buffer that is about to go out on the wire: an ICMP error quoting the offending packet, or a driver's TX bounce buffer in skb_copy_and_csum_dev(). Neither buffer is zeroed beforehand, so whatever was in memory there gets sent. Zero the part of the buffer we didn't fill. The checksum usually won't match the data any more, so the receiver will usually drop the packet, but either way it no longer carries anything it shouldn't. Only zero for a positive @len, a negative one from a broken caller must not turn into a huge memset().
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
65249feb6b3df9e17bab5911ee56fa7b0971e231 to < 5f19b9cfff79508e8cb09be40d014cb0807f3854affected65249feb6b3df9e17bab5911ee56fa7b0971e231 to < 5551399751e2c9f31e4f3428040985a07e79d9c2affected65249feb6b3df9e17bab5911ee56fa7b0971e231 to < 39d1a6b601831237c6038b5e3ac8dbb883c1700aaffected65249feb6b3df9e17bab5911ee56fa7b0971e231 to < ab9414ed70bd783e902a85c350620dee269bcb2baffected
Linux Linux
Default version status: affected
6.12affected0 to < 6.12unaffected6.12.113 to ≤ 6.12.*unaffected6.18.57 to ≤ 6.18.*unaffected7.2.11 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected