CVE-2026-98287: Linux kernel · pppoatm: ensure a writable skb header and linear data
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ffc448eb54f5ba80d4212c1e870cdb92b0f709fa : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in ffc448eb54f5ba80d4212c1e870cdb92b0f709fa, ecc7253683a3c55caa868ce0ee530fcb0044bd3c, e6cd1bba7d113c15c00ac63671213a096fe4d686 +4
Exploitation evidence
Disclosed: evidence found.
CVE published 6 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been applied in the Linux kernel commits identified by hashes ffc448eb54f5ba80d4212c1e870cdb92b0f709fa and others. Users should update to a Linux kernel version that includes these patches to remediate the vulnerability.
Description
A vulnerability in the Linux kernel's pppoatm component was fixed to ensure the socket buffer (skb) header is writable and linear before pushing the LLC header. The flaw involved insufficient checks for writable skb headers in pppoatm_send(), which could lead to out-of-bounds reads or unbalanced skb operations. The fix includes using skb_cow_head() for writable headers, calling pskb_may_pull() to prevent out-of-bounds reads, and deferring protocol compression until after admission checks.
References
- git.kernel.org/stable/c/208ccc4d08b1897451e9ba01c016bf93ff107966 (opens in a new tab)
- git.kernel.org/stable/c/e6cd1bba7d113c15c00ac63671213a096fe4d686 (opens in a new tab)
- git.kernel.org/stable/c/ffc448eb54f5ba80d4212c1e870cdb92b0f709fa (opens in a new tab)
- git.kernel.org/stable/c/8e66c5969acd859ba72fb0a7fa895623fc1b3769 (opens in a new tab)
- git.kernel.org/stable/c/e2f5529b0016db7d34f411408607f5cf395a542e (opens in a new tab)
- git.kernel.org/stable/c/30992fe39e65589ed8e000425e088fa74994b811 (opens in a new tab)
- git.kernel.org/stable/c/ecc7253683a3c55caa868ce0ee530fcb0044bd3c (opens in a new tab)