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CVE-2024-39490
published 2024-07-10

CVE-2024-39490: In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix missing sk_buff release in seg6_input_core The seg6_input() function is…

PriorityP424medium6.2CVSS 3.1
AVLACLPRNUINSUCHINAN
EPSS
0.22%
13.2th percentile
In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix missing sk_buff release in seg6_input_core The seg6_input() function is responsible for adding the SRH into a packet, delegating the operation to the seg6_input_core(). This function uses the skb_cow_head() to ensure that there is sufficient headroom in the sk_buff for accommodating the link-layer header. In the event that the skb_cow_header() function fails, the seg6_input_core() catches the error but it does not release the sk_buff, which will result in a memory leak. This issue was introduced in commit af3b5158b89d ("ipv6: sr: fix BUG due to headroom too small after SRH push") and persists even after commit 7a3f5b0de364 ("netfilter: add netfilter hooks to SRv6 data plane"), where the entire seg6_input() code was refactored to deal with netfilter hooks. The proposed patch addresses the identified memory leak by requiring the seg6_input_core() function to release the sk_buff in the event that skb_cow_head() fails.

Affected

16 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.94-1 (bookworm)linux 6.1.94-1 (bookworm)
linuxlinux
linuxlinux>= af3b5158b89d3bab9be881113417558c71b71ca4 < e8688218e38111ace457509d8f0cad75f79c1a7ae8688218e38111ace457509d8f0cad75f79c1a7a
linuxlinux>= af3b5158b89d3bab9be881113417558c71b71ca4 < 8f1fc3b86eaea70be6abcae2e9aa7e7b994538648f1fc3b86eaea70be6abcae2e9aa7e7b99453864
linuxlinux>= af3b5158b89d3bab9be881113417558c71b71ca4 < f4df8c7670a73752201cbde215254598efdf6ce8f4df8c7670a73752201cbde215254598efdf6ce8
linuxlinux>= af3b5158b89d3bab9be881113417558c71b71ca4 < f5fec1588642e415a3d72e02140160661b303940f5fec1588642e415a3d72e02140160661b303940
linuxlinux>= af3b5158b89d3bab9be881113417558c71b71ca4 < 5447f9708d9e4c17a647b16a9cb29e9e02820bd95447f9708d9e4c17a647b16a9cb29e9e02820bd9
linuxlinux_kernel>= 0 < 6.1.94-16.1.94-1
linuxlinux_kernel>= 0 < 6.9.7-16.9.7-1
linuxlinux_kernel>= 0 < 6.9.7-16.9.7-1
linuxlinux_kernel>= 0 < 5.15.0-121.1315.15.0-121.131
linuxlinux_kernel>= 0 < 6.8.0-44.446.8.0-44.44
linuxlinux_kernel>= 4.12 < 5.15.1615.15.161
linuxlinux_kernel>= 5.16 < 6.1.936.1.93
linuxlinux_kernel>= 6.2 < 6.6.336.6.33
linuxlinux_kernel>= 6.7 < 6.9.46.9.4

CVSS provenance

nvdv3.16.2MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
osv6.2MEDIUM
vendor_ubuntu6.3MEDIUM
vendor_debian6.2MEDIUM
vendor_redhat6.2MEDIUM
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