CVE-2024-49979
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-49979
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-49979.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-49979
- Downstream
- Related
- Published
- 2024-10-21T18:02:25.819Z
- Modified
- 2025-11-20T06:32:04.601077Z
- Summary
- net: gso: fix tcp fraglist segmentation after pull from frag_list
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: gso: fix tcp fraglist segmentation after pull from frag_list
Detect tcp gso fraglist skbs with corrupted geometry (see below) and pass these to skbsegment instead of skbsegment_list, as the first can segment them correctly.
Valid SKBGSOFRAGLIST skbs - consist of two or more segments - the headskb holds the protocol headers plus first gsosize - one or more fraglist skbs hold exactly one segment - all but the last must be gsosize
Optional datapath hooks such as NAT and BPF (bpfskbpull_data) can modify these skbs, breaking these invariants.
In extreme cases they pull all data into skb linear. For TCP, this causes a NULL ptr deref in _tcpv4gsosegmentlistcsum at tcphdr(seg->next).
Detect invalid geometry due to pull, by checking headskb size. Don't just drop, as this may blackhole a destination. Convert to be able to pass to regular skbsegment.
Approach and description based on a patch by Willem de Bruijn.
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedbee88cd5bd83d40b8aec4d6cb729378f707f6197Fixed3fdd8c83e83fa5e82f1b5585245c51e0355c9f46
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedbee88cd5bd83d40b8aec4d6cb729378f707f6197Fixed2d4a83a44428de45bfe9dccb0192a3711d1097e0
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedbee88cd5bd83d40b8aec4d6cb729378f707f6197Fixed17bd3bd82f9f79f3feba15476c2b2c95a9b11ff8
Affected versions
v6.*
v6.10
v6.10-rc1
v6.10-rc2
v6.10-rc3
v6.10-rc4
v6.10-rc5
v6.10-rc6
v6.10-rc7
v6.10.1
v6.10.10
v6.10.11
v6.10.12
v6.10.13
v6.10.2
v6.10.3
v6.10.4
v6.10.5
v6.10.6
v6.10.7
v6.10.8
v6.10.9
v6.11
v6.11-rc1
v6.11-rc2
v6.11-rc3
v6.11-rc4
v6.11-rc5
v6.11-rc6
v6.11-rc7
v6.11.1
v6.11.2
v6.9
v6.9-rc7
Database specific
vanir_signatures
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