Answer in brief
CVE-2023-53559 records a High severity (CVSS 7.8) vulnerability in ip_vti: fix potential slab-use-after-free in decode_session6. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2023-53559 records a High severity (CVSS 7.8) vulnerability in ip_vti: fix potential slab-use-after-free in decode_session6. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:3.19:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:3.19:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 3.19 | Not reported |
| Linux/Linuxgeneric | >=f855691975bb06373a98711e4cfe2c224244b536 <82fb41c5de243e7dfa90f32ca58e35adaff56c1d || >=f855691975bb06373a98711e4cfe2c224244b536 <7dfe23659f3677c08a60a0056cda2d91a79c15ca || >=f855691975bb06373a98711e4cfe2c224244b536 <d34c30442d5e53a33cde79ca163320dbe2432cbd || >=f855691975bb06373a98711e4cfe2c224244b536 <0b4d69539fdea138af2befe08893850c89248068 || >=f855691975bb06373a98711e4cfe2c224244b536 <e1e04cc2ef2c0c0866c19f5627149a76c2baae32 || >=f855691975bb06373a98711e4cfe2c224244b536 <2b05bf5dc437f7891dd409a3eaf5058459391c7a || >=f855691975bb06373a98711e4cfe2c224244b536 <78e397a43e1c47321a4679cc49a6c4530bf820b9 || >=f855691975bb06373a98711e4cfe2c224244b536 <6018a266279b1a75143c7c0804dd08a5fc4c3e0b | 82fb41c5de243e7dfa90f32ca58e35adaff56c1d, 7dfe23659f3677c08a60a0056cda2d91a79c15ca, d34c30442d5e53a33cde79ca163320dbe2432cbd, 0b4d69539fdea138af2befe08893850c89248068, e1e04cc2ef2c0c0866c19f5627149a76c2baae32, 2b05bf5dc437f7891dd409a3eaf5058459391c7a, 78e397a43e1c47321a4679cc49a6c4530bf820b9, 6018a266279b1a75143c7c0804dd08a5fc4c3e0b |
Published upstream
Oct 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: ip_vti: fix potential slab-use-after-free in decode_session6 When ip_vti device is set to the qdisc of the sfb type, the cb field of the sent skb may be modified during enqueuing. Then, slab-use-after-free may occur when ip_vti device sends IPv6 packets. As commit f855691975bb ("xfrm6: Fix the nexthdr offset in _decode_session6.") showed, xfrm_decode_session was originally intended only for the receive path. IP6CB(skb)->nhoff is not set during transmission. Therefore, set the cb field in the skb to 0 before sending packets.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:3.19:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:3.19:rc7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 3.19 | Not reported |
| Linux/Linuxgeneric | >=f855691975bb06373a98711e4cfe2c224244b536 <82fb41c5de243e7dfa90f32ca58e35adaff56c1d || >=f855691975bb06373a98711e4cfe2c224244b536 <7dfe23659f3677c08a60a0056cda2d91a79c15ca || >=f855691975bb06373a98711e4cfe2c224244b536 <d34c30442d5e53a33cde79ca163320dbe2432cbd || >=f855691975bb06373a98711e4cfe2c224244b536 <0b4d69539fdea138af2befe08893850c89248068 || >=f855691975bb06373a98711e4cfe2c224244b536 <e1e04cc2ef2c0c0866c19f5627149a76c2baae32 || >=f855691975bb06373a98711e4cfe2c224244b536 <2b05bf5dc437f7891dd409a3eaf5058459391c7a || >=f855691975bb06373a98711e4cfe2c224244b536 <78e397a43e1c47321a4679cc49a6c4530bf820b9 || >=f855691975bb06373a98711e4cfe2c224244b536 <6018a266279b1a75143c7c0804dd08a5fc4c3e0b | 82fb41c5de243e7dfa90f32ca58e35adaff56c1d, 7dfe23659f3677c08a60a0056cda2d91a79c15ca, d34c30442d5e53a33cde79ca163320dbe2432cbd, 0b4d69539fdea138af2befe08893850c89248068, e1e04cc2ef2c0c0866c19f5627149a76c2baae32, 2b05bf5dc437f7891dd409a3eaf5058459391c7a, 78e397a43e1c47321a4679cc49a6c4530bf820b9, 6018a266279b1a75143c7c0804dd08a5fc4c3e0b |
Published upstream
Oct 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: ip_vti: fix potential slab-use-after-free in decode_session6 When ip_vti device is set to the qdisc of the sfb type, the cb field of the sent skb may be modified during enqueuing. Then, slab-use-after-free may occur when ip_vti device sends IPv6 packets. As commit f855691975bb ("xfrm6: Fix the nexthdr offset in _decode_session6.") showed, xfrm_decode_session was originally intended only for the receive path. IP6CB(skb)->nhoff is not set during transmission. Therefore, set the cb field in the skb to 0 before sending packets.
Quoted source text, attributed separately from HOL analysis.