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Vulnerabilities

Vulnerability · GHSA-qwgh-2vcv-g2f7

block_buffer: panic corrupts inline buffer position

Published Aug 19, 2026 · catalog updated Oct 30, 2026 · block_buffer: panic corrupts inline

Last checked Oct 31, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for GHSA-qwgh-2vcv-g2f7. A missing EPSS score is not a low risk. Compare block_buffer: panic corrupts inline with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (block_buffer: panic corrupts inline).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Advisory link
Affected products
crates.io block_buffer

### Summary A caught panic may leave the cursor position of or in a corrupted state; this in turn allows out-of-bounds reads/writes. ### Details & PoC The following two tests fail miri: They fail on an under the invariant for the to always be within bounds of the block. ### Impact While the byte that overwrites may come from untrusted input and is therefore attacker-controlled, this still relies on the surrounding code catching the panic and carrying on, which should be uncommon in practice. For this to be exploitable, the attacker also needs a way to trigger a panic here; I have not investigated how feasible that is. ### Credits The issue was discovered by GPT-5.5

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • crates.io block_buffer0.11.0 → 0.12.1

How to fix GHSA-qwgh-2vcv-g2f7

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for GHSA-qwgh-2vcv-g2f7. A missing EPSS score is not a low risk. Compare block_buffer: panic corrupts inline with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0.11.0 → 0.12.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-119: Buffer Overflow. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 19, 2026 · GitHub Advisory Database

    Detected

    ### Summary A caught panic may leave the cursor position of or in a corrupted state; this in turn allows out-of-bounds reads/writes. ### Details & PoC The following two tests fail miri: They fail on an under the invariant for the to always be within bounds of the block. ### Impact While the byte that overwrites may come from untrusted input and is therefore attacker-controlled, this still relies o

  2. Oct 30, 2026 · GitHub Advisory Database

    Fix available

    block_buffer fixed in 0.12.1

  3. Oct 30, 2026 · GitHub Advisory Database

    Fix available

    block_buffer fixed in 0.12.1

  4. Oct 30, 2026 · GitHub Advisory Database

    Updated

    ### Summary A caught panic may leave the cursor position of or in a corrupted state; this in turn allows out-of-bounds reads/writes. ### Details & PoC The following two tests fail miri: They fail on an under the invariant for the to always be within bounds of the block. ### Impact While the byte that overwrites may come from untrusted input and is therefore attacker-controlled, this still relies o

Sources

References

Freshness

Last verified in this catalog Oct 30, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • GitHub Advisory DatabaseOct 31, 2026
  • OpenSSF OSV / OSV ScannerOct 31, 2026