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CVE
PUBLISHED

CVE-2024-39490

ipv6: sr: fix missing sk_buff release in seg6_input_core

AssignerLinux
Reserved2024-06-25
Published2024-07-10
Updated2024-07-15

Description

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.

Product status

Default status
unaffected

af3b5158b89d before e8688218e381
affected

af3b5158b89d before 8f1fc3b86eae
affected

af3b5158b89d before f4df8c7670a7
affected

af3b5158b89d before f5fec1588642
affected

af3b5158b89d before 5447f9708d9e
affected

Default status
affected

4.12
affected

Any version before 4.12
unaffected

5.15.161
unaffected

6.1.93
unaffected

6.6.33
unaffected

6.9.4
unaffected

6.10
unaffected

References

https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7a

https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864

https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8

https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940

https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9

cve.org CVE-2024-39490

nvd.nist.gov CVE-2024-39490

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