CVE-2026-98102
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: fix RCU list diversion in ip6_mc_del1_src() When removing a source filter whose count reaches zero, ip6_mc_del1_src() unlinks psf from pmc->mca_sources. If the filter was previously active, the code moved psf directly into pmc->mca_tomb by updating psf->sf_next. Because pmc->mca_sources is traversed locklessly under RCU (e.g. by ipv6_chk_mcast_addr()), mutating psf->sf_next before a grace period elapses diverts concurrent readers to the tombstone list. Consequently, readers miss remaining active sources in pmc->mca_sources and improperly examine deleted tombstone entries. Fix this by allocating a new tombstone node for pmc->mca_tomb (as done in sf_setstate()) and retiring the original psf via kfree_rcu().
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4b200e398953c237c86d32bf26d4cb2a96556a6f | affected | git | c3343cd7ec8706c221e52b782f386b9af14a928a | Unavailable | None listed |
| 4b200e398953c237c86d32bf26d4cb2a96556a6f | affected | git | 4352737297b262e8367675c19a7dc6a9f53c97af | Unavailable | None listed |
| 4b200e398953c237c86d32bf26d4cb2a96556a6f | affected | git | 8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4 | Unavailable | None listed |
| 4b200e398953c237c86d32bf26d4cb2a96556a6f | affected | git | 5149c60c406595b56fda0c6e9aae7fd287f636aa | Unavailable | None listed |
| 4b200e398953c237c86d32bf26d4cb2a96556a6f | affected | git | 93b49239840b91313adbd77b8b52993eff2d08c1 | Unavailable | None listed |
| 86c49119f0353f857cc08030ec9e4ebaab3d5a64 | affected | git | Unavailable | Unavailable | None listed |
| 5.10.261 | affected | semver | 5.11 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.13 | Unavailable | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.111 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.53 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.7 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |